once those 2 screws are removed the whole action lifts out of the stock . $29.99 + $4.99 shipping. Posts: 735. Since JavaScript is disabled, you will not be able to properly navigate, add items to your cart, or place an order. Our selection of firear The Marlin Model 37, .22 caliber pump action rifle was made from 1923 to 1931. . Wish List (0) . Marlin Marlin . Marlin Bullseye, 336 Series, 1894 Series, 1895, 1895S, 39A & more, free ship. thunderbolts will dirty it up in a hurry as will the winchester xperts if yours will even load them . 1101 Mason Circle Drive Pevely, MO 63070 Mon-Fri 8:00am - 4:00pm CST, 2023 Midwest Gun Works, Inc. - All Rights Reserved. USPS Priority Mail with tracking confirmation: $ 7.85 - insurance extra, if requested. Lol. Marlin Model 60 .22 Inner Magazine Tube - For Pre 1975 Rifles Part 607222. sure thing , first pull the magazine tube out and set it aside . Locking Bolt - Original - This Marlin manufactured locking bolt is for the model 37 takedown slide action rimfire rifle and is in very good condition exhibiting a brownish gray patina with light wear. Vintage MARLIN BREECH BOLT Assembly complete with FIRING PIN, EXTRACTOR and LONG LOCKING BOLT - in used and uncleaned condition. OT but you have to start somewhere. This particular Marlin Model 39 is a lever-action .22 rimfire rifle, manufactured by Marlin between 1921 and 1937. I had an old marlin 30-30 that would do that sometimes, and I found that if I umped the lever with the palm of my hand a little further open it would close just fine. by orangeace750 Thu Dec 02, 2010 6:55 pm, Post $32.95. The above procedure worked every time. Add to Cart. . then on the receiver pull the bolt back , place your finger infront of it and lightly lift up to remove the cocking lever from the side . There's the pre-war Model 39 and the 39-A. Marlin Model 37 Locking Bolt Build If you are looking for Seeley Marlin Model 37 Locking Bolt Build Yes you see this. This same locking block was also used in the 20, 20S, 29,37, and 47, but I have exhausted all the sources I could find on the internet. It is fitted with a lightweight synthetic stock as standard - when tapped lightly, it sounded hollow and 'plasticy'. Jump to Latest Follow 1 - 5 of 5 Posts. A forum community dedicated to Rimfire Central Firearm owners and enthusiasts. My Marlin 22 LR Model 60 does not lock open manually or when the last shot from the mag is fired. mine really likes the 550 federal bulk pack and won't even attempt to fire winchester xperts , but every gun is different , so pick up a few small boxes of different brand of ammo and see what it likes . Marlin 99 bolt open assist tool. This Marlin manufactured buttplate screw is for the model 37 takedown slide action rimfire rifle and.. Whether you're into hunting, shooting, fishing, or knife throwing, we've got you covered with the items you need. Feel secure in trusting Marlin Factory parts, one of the oldest names in American firearms. Avoid ordering parts until you are sure you need them, as old guns can be so jammed with century-old oil turned to hard varnish and mixed with concreted powder . -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Please study the pictures - they are the most important part of the description! $ 52.50. I have recently obtained a Marlin Model 37 .22 pump action rifle, SN 3153. Operation seems normal when pulling the bolt back, as well as pushing the bolt forward. JavaScript seems to be disabled in your browser. Model 1898 Model 16 Model 17. Manufacturer: Marlin: Model: 29: Part Number: 530520: Material: For semi-automatic options, the Model 60 is a best-seller, and popular bolt-action rifles come from the XT series. Manufacturer: Marlin Model: 37. 5 Rare Antique Gun, Rifle, Shotgun Wooden Stocks Remington, Winchester, C166 Redfield International Match Receiver Sight Winchester 52 Target Ri. This Marlin manufactured rear sight is for the model 37 takedown slide action rimfire rifle and is i.. I cannot remember, when MARLIN switched over to the short Locking Bolt and "new Model" Firing Pin - but this Breech Bolt may also be fine in a Model 47 MARLIN Rifle. the Model 1895 was and remains the woods hunter's dream gun . . Here is a Marlin Model 37, .22 caliber pump action rifle. Thanks chrifle, I look forward to what you find. Atlanta, Georgia 30328 | 877.481.5750, Vintage MARLIN BREECH BOLT Assembly complete with FIRING PIN, EXTRACTOR and LONG LOCKING BOLT - in used and uncleaned condition. Qty: 1. cfnparts.com/Marlin%20Model%2037%20Rimfire%20Rifle%20Parts-729?product_id=19787, Mozilla/5.0 (iPhone; CPU iPhone OS 15_3_1 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/15.3 Mobile/15E148 Safari/604.1. The 3 missing parts are; the locking bolt plunger, the locking bolt plunger spring and the locking bolt plunger screw. Add to Cart. Senior Member. The Fora platform includes forum software by XenForo. Second Media Inc., 30800 Telegraph Rd, Suite 1921, Bingham Farms, MI 48025 USA. I've got a M99 M1 and there is no way to lock the bolt open. Some bolt hold-open devices had a spring loaded button on top of the bolt lever, others required that you pull the lever back fully, then pull lever outward to lock it open. We use cookies to give you the best possible user experience & to analyze traffic. It's in good shape with light wear from usage, storage, and handling. Internal upgrades included a locking lug and firing pin system that prevented discharge until the bolt was locked in place. . . UBERTI PARTS MARLIN PARTS ITHACA PARTS RELOADING EQUIPMENT AND TOOLS GUN BOXES MERIDEN PARTS HOPKINS and ALLEN RIFLE PARTS PAGE-LEWIS PARTS HAMILTON PARTS SAVAGE Stock Forearm Barrel Buttplate Grip Cap Magazine Tube Screw Pin Spring Sight Elevators Sling Swivel Saddle Ring Tang Peep Sight Bolt Trigger barrels buttplats stocks screws bolts . Marlin Model 37 Slide-Action Rifle Marlin Model 38 Slide-Action Rifle Marlin Model 40 Slide-Action Rifle Marlin Model 47 Slide-Action Rifle . Manufacturer: Marlin. I'll send a pic. Maybe you need a new handle. Enfield and Mauser. Sign up with your email to be notified when this product is back in stock! Thank you for visiting our website. Oct 30, 2021. You can buy parts from Gun Parts Corp, Brownell's (current 39-AS), Jack First, Poppert's, Wisner's, and Bob's Gun Parts. The round bolt Model 336 is demonstrably stronger than the square bolt Model 1936/36. The Blue Book of Guns lists its manufacture between 1913 and 1916. Free shipping for many products! For the condition of these MARLIN Rifle Parts - p lease enlarge and st udy the pictures - you are bidding for what is pictured - nothing more / less. The Annie Oakley rifle!. On 11/4/2016 at 9:44 AM, Larsen E. Pettifogger, SASS #32933 said: Oversize locking bolts for the a Marlin may exist but I have never seen one and never heard of one advertised for sale. Reviews (0) Marlin Model 336 Locking Bolt. . SKU: M00831 Category: Marlin Model 336 Tag: Locking Bolt. Looked for the best forum, who knew it would be in Pennsylvania!My Marlin Glenfield Model 25 fails to remain cocked when I close the bolt. This BREECH BOLT is for the MARLIN .22 caliber Pump Action Repeating Rifles Model 20 - 29 & 37. Marlin Model 336 Features. 0.00. PUMP SHOTGUNS. Sponsored. 2 (5) WIN MODEL 12 PRE-FINISHED REPLACEMENT BUTTSTOCK. has closed - we expect PROMPT (within 24 hours of auction end) payment. by strongtower1 Mon Dec 12, 2011 2:37 pm, Post Add to Cart. The 18's used a slightly different bolt than any of the later models and uses the long locking lug. New Marlin 336 Rear Barrel Band Assy Blue (4063635) $11900. . $44.37. Bill. Description: Browning Citori Stock Bolt Wrench, 5MM Allen. Model 28TS Trap Gun Model 28T Trap Gun Model 30 Model 30 Field Grade Model 31 Model 42/42A. Come join the discussion about optics, ammo, gunsmithing, styles, reviews, hunting, accessories, classifieds, and more! Your credit card or PayPal account will be charged. The bolt has to fit in the mortise in the receiver. even tho it doesn't have a lock it's never really bothered me because the port is too small for me to fit my fat fingers into for single loading , and when i clean the gun i take it apart anyway . This only happened when unloading the weapon and then only a very few times. Parts are available to the public for self installation, but they can also be installed by our . ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Once the auction. Description. by Hooker53 Mon Dec 02, 2013 4:30 pm, Powered by phpBB Forum Software phpBB Limited. Marlin Model 37 Bolt Seating Problem Rimfire Firearms. Answer (1 of 3): After ensuring the magazine and chamber are empty: 1. pull the bolt back. Marlin 20, 20A, 20S, 29, 37, 47 Parts Layout w/ List. Notifications . If this item contains incorrect or inappropriate information please. I will search my parts box when back in the states in January; my list says I have one, but it's possible I already sent it out to someone else. Hoosier Gun Works, Dealing in gun parts, 100000 gun parts, 2000 gun stocks, 1000 magazines, 500 barrels. We are glad to be able to offer parts for most current production Marlin firearms. Marlin F406147 : FINGER LEVER PISTOL GRIP 39A . Mainspring and trigger spring were of coil type and the hammer design was improved. Welcome to The Great Outdoors Firearm and Sportsman Auction, your one-stop shop for all your outdoor activities! The short locking lug bolts from a 20A would 'fit' in the action but would be recessed . The Marlin Model 336 is a lever-action rifle and carbine made by Marlin Firearms. also don't use hyper rounds in your 99 , it's not meant for the high powered rounds . After about 100 rounds the lever became hard . Marlin . Add to Cart. Product Details. 226 Williams Ln. We request a Postal Carrier pickup, as soon as we receive payment. A 24" tapered round barrel was standard. The 37 has the wider receiver like the 29N & 47 and the short locking lug like the 20S and 20A and possibly another model. Mailing Address: P.O. The parts listed in this section are specific to the Marlin rifles made post 2009. JavaScript is disabled. It's in good shape with light wear from usage, storage, and handling. Qty: 1. This Marlin manufactured rear sight elevator is for the model 37 takedown slide action rimfire rifle.. I need the firing pin and the other parts for the breech. This Marlin manufactured locking bolt is for the model 37 takedown slide action rimfire rifle and is.. Does anyone know of where such a piece can be found? After watching a few youtube videos I tried smoothing out the action by polishing the lever, locking block, feed ramp, bolt and extractor groove, I also replaced the stock 2 piece extractor with a one piece extractor. .As per eBay's RULES & REGULATIONS: Gun Parts CANNOT be sold outside the USA. Product #: 375000 . Find many great new & used options and get the best deals for Marlin 336 Lever Action Vintage Carrier #1 at the best online prices at eBay! Notice: We are a "Mail Order Only" company and do not have a show room or location for the public to pick up merchandise. I know nothing about it. Website by Hudson, This product is no longer available, however, Marlin 20, 20A, 20S, 29, 37, 47 Parts Layout w/ List, Cartridge Guide Base Assembly, Used Factory Original, Cartridge Guide Spring, New Factory Original, Firing Pin, Steel, New Reproduction (Minor Fitting May Be Req'd), Locking Bolt Plunger, Used Factory Original, Magazine Plug, Inner, Used Factory Original, Magazine Plug, Outer, .22 Cal., Used Factory Original, Barrel, .22 Cal., 20", New Factory Original, Round (For 17" Magazine Tube), Barrel, .22 Cal., 20", Round, Used Factory Original, Barrel, .22 Cal., 24", Factory Original, Round (For 22-1/2" Magazine Tube), Barrel, .22 Cal., New Factory Original, Round (For 14-3/4" Magazine Tube), Cartridge Cut-Off Screw, New Factory Original, Cartridge Guide Base Screw, New Factory Original, Cartridge Guide Base Screw, New Reproduction, Forend, Wood, Used Factory Original (For Round Barrel), Magazine Spring, .22 Cal., New Reproduction (Fitting Req'd), Rear Sight w/ Elevator, Semi-Buckhorn, Blued, New Repro (Fits 3/8" Dovetails), Stock, Straight Grip, Semi-Finished w/ Inlet For "S" Crescent Buttplate. UBERTI PARTS MARLIN PARTS ITHACA PARTS RELOADING EQUIPMENT AND TOOLS GUN BOXES MERIDEN PARTS HOPKINS and ALLEN RIFLE PARTS PAGE-LEWIS PARTS HAMILTON PARTS SAVAGE Stock Forearm Barrel Buttplate Grip Cap Magazine Tube Screw Pin Spring Sight Elevators Sling Swivel Saddle Ring Tang Peep Sight Bolt Trigger barrels buttplats stocks screws bolts . Model 39A; Model 60; Model 70; Model 795; Model XT-17 Detachable Magazine; View Product Details. marlin model 37 locking bolt Please specify an ID for the Contact Form in Video Settings > Video Post > Spam Flag-Contact Form 7 ID or Spam Flag-Gravity Form ID If you have any questions or concerns, please send an email through our contact us page or use the link below. BREECH BOLT FRONT NICKEL 915YS . With its solid receiver and side ejection, Marlin added a round bolt rather than the square bolt of earlier rifles. Above is a reference image to show the general condition of the parts we have in stock. Due to the increasing cost of ammunition, there will be no warning shot! Qty: 2. The action got a lot smoother. Add to Wish List Add to Compare . All Rights Reserved. I am not sure what Marlin calls this part, but that is the simple explanation. You are considering a vintage Factory Original Marlin Model 1894 Locking Bolt. Above is a reference image to show the general condition of the parts we have in stock. If you are the site owner (or you manage this site), please whitelist your IP or if you think this block is an error please open a support ticket and make sure to include the block details (displayed in the box below), so we can assist you in troubleshooting the issue. Monday-Friday 8:00 AM 5:00 PM Eastern Standard Time. Fits Marlin Model 308, 336, 338, 410 Lever, 444 and 1895 rifles. This gun belonged to my father who recently passed away. Does anyone know what the problem is or might be. To be kind covers everything--even honesty. Qty: 5. There's the post-war 39-A that stayed the same until the early 1980's, then there's the current 39-AS with the safety. Immediate payment will ship the next morning. Your email address will not be published. This Marlin manufactured butt plate is for the model 37 takedown slide action rimfire rifle and is i.. After doing some research on the Marlin online boards it appears this is a pretty rare gun. The Marlin 336-1895 action has a "locking bolt" which moves vertically into a "notch" cut into the underside of the bolt at the rear. Marlin 336 Carrier- Rocker & Locking Bolt- Lever Action Model 336 30 375-19307. . To the best of my knowledge it hasnt been fired in the last 30+ years. any time , have you had a chance to shoot it yet ? Your email address will not be published. All Rights Reserved. $5.86. This Marlin manufactured "B" stamped rear sight elevator is for the model 37 takedown slide action r.. By the time the bolt is in its locked home position, the . When you purchase through links on our site, we may earn an affiliate commission, which supports our community. Chrifle, Any luck finding a part for me? I think the 99m1 was first manufactured in 1964. Condition: Used Used bluesea112. 2. once the bolt is all the way back, press the charging handle to the left (inwards towards the body of the rifle). Bob's Gun Shop Po Box 200 Royal AR 71968 MILLIONS OF GUN PARTS !! $29.99 + $4.99 shipping. Out of stock. Welcome visitor you can login or create an account. We prefer to ship your item quickly, and not sit on it for days. Due to the nature of the used parts industry, there may be some variation in wear and finish. Gun Marlin 917V In 17 HMR Bolt Action Rifle-Used, Factory Original Marlin Model 19 Breech Bolt Complete Minus Firing Pin F, Gun Marlin 925M In 22 Mag Bolt Action Rifle-Used, Gun Marlin 882SS In 22 WMR Bolt Rifle-Like New, 1889 Marlin Rifle 32-W Breech Bolt Assembly With Firing Pin & Extractor, Gun Marlin Model 100 Bolt Action Single Shot 22, 2023 - WorthPoint Corporation | 5 Concourse Parkway NE, Suite 2900. Box 413 Glenside, PA 19038, Business Address: 1 Limekiln Pike Glenside, PA 19038, Phone: +1 215-887-2391 Email: sales@poppertsgunparts.com, Be the first to review Marlin Model 336 Locking Bolt. (Marlin) (37) Semi-Auto .22 (51) Special Offfers (10) Stocks and Forearms (14) Upgrades and Tuning (71) DIP (4) Thanks man. Its serial # is 2963 so I am assuming it to have been made in the 1911-1914 range. Many times the recoil will cause one of those pieces of wood to break off and fall into the action mechanism. The cheapest place in the UK to buy Marlin Spares and Upgrades. by strongtower1 Mon Feb 20, 2012 9:48 pm, Post I don't even know how to clear this rifle. It is the same action as the model 60. By continuing to use our site, you accept our use of cookies. Shipping Show Details. This model has a straight-grip stock and a reduced magazine capacity of 20 short, 15 long, or 14 long rifle cartridges. Access from your Country was disabled by the administrator. New Marlin 1895 45-70 Loading Gate/Spring Blue (406094) $7900. At 40 1/2" in length and 7 lbs. then lift out the bolt (carefully as there's a rod and spring behind it ) clean and oil everything and put it back together , thats about it . I took my rifle to a local gunsmith and found that I am missing some parts. More Info Out of Stock. Find Marlin/Glenfield Model 37 parts and schematics today with Numrich Gun Parts. Marlin Models 20, 20A, 20S, 25, 29, 37, 47 firing pin spring #85-28. reproduction This part is manufactured of high quality spring steel and heat-treated to precise spec.. $4.00. Hours of Operation: FAX 24 hours a Day (501)-767-2750 (Leave Your FAX # when you FAX.) My Model 60 was made in 1986, and it does have a last shot hold open, and you can push the bolt in when it's fully retracted to lock it wide open for storage. Marlin 29 locking bolt. Locking Bolt Plunger Spring Enlarge Image. Due to the nature of the used parts industry, there may be some variation in wear and finish. This information will make owning this. Thanks loads for your help. Thank you. 2023 Gravel Agency Store. Add to Wish List . View Product Details. The store will not work correctly in the case when cookies are disabled. Items in the Price Guide are obtained exclusively from licensors and partners solely for our members research needs. This Marlin manufactured locking bolt is for the model 37 takedown slide action rimfire rifle and is.. $54.50 Ex Tax: $54.50. By continuing to use our site, you accept our use of cookies. Its serial # is 2963 so I am assuming it to have been made in the 1911-1914 range. Military and comercial. lay the left side of the action on a table and examine how the bolt and bolt lock (#37) move and lock into battery in the action. Marlin 336 Lever Action Vintage Breechbolt #2. remove those 4 screws and that whole assembly comes off in one piece . I had to grind the bolt to get it to fit into the shell casing, and I used electrical tape to keep the tool from scraping the rifle. It hasn't wiped out the idea of shopping in a monster store, but it gave the consumers an swing means to shop and a greater than before make known . Marlin 336 Locking Bolt- Lever Action Model 30 336 30-30- 20238. Add to Wish List . Where can I get an owners manual? Front Ramp Sight Insert 36 Hammer 37 Hammer Screw 38 Hammer Spring / Mainspring 39 Hammer Spring Adjusting Plate 40 Hammer Spur 41 Hammer Spur Screw 42 Hammer Spur Wrench 43 Hammer Strut 44 Hammer Strut Pin 46 Loading Spring Screw 47 Locking Bolt 49 Magazine . New Marlin 336 Rear Barrel Band Blue (4063634) $6900. I have cut and ground a 223 shell casing to hold open the bolt and allow me to feed a bore snake into the action for cleaning. Any input from you out there? He told me that a common problem found in Marlin lever guns is that there are two small slivers of wood machined into the stock. Copyright 1999 2023 GoDaddy Operating Company, LLC. Click below to begin your paid subscription. Here's my homemade tool, made from a 223 shell, cut off at the neck, spread a bit, and with a machine screw handle. JavaScript is not enabled on your browser - our site will not work for you as intended. Marlin Model 37 Takedown Slide Action Rimfire Rifles: 1913 - 1916. Lewis. Product Information. When the bolt is pushed down though, the striker drops. . I am restoring my dad's first gun, a Marlin 20A pump action .22 rifle. It was 1996, 37 years after the demise of all three Marlin bolt-action centerfire rifles, that Marlin once again threw its hat into the ring with the Marlin MR7, a completely new rifle built on an action of its own design and manufacture. mine is a 1959 , when i first got it i spent almost 10 minutes messing with the cocking lever trying to get it to push in or pull out , but once you take it apart the first time you'll see it just sits on the bolt . Locking Bolt Plunger Spring. Pick it up today to repair or complete your Marlin Model 1893 Lever-Action Centerfire Rifle. That's the reason that Marlin re-designed the Model 1936/36 into the Model 336. . by orangeace750 Sun Dec 12, 2010 5:56 pm, Powered by phpBB Forum Software phpBB Limited, This is an area for guests to post questions. Oct 28, 2008. Pick it up today to repair or complete your Marlin Model 1894 Lever-Action Rifle. . Please ask questions BEFORE you bid. Browning Browning Citori; Citori. 1101 Mason Circle Drive Pevely, MO 63070 Mon-Fri 8:00am - 4:00pm CST, 2023 Midwest Gun Works, Inc. - All Rights Reserved. 4 in stock. On my 989M2, if I pull the bolt back and push in on the handle, the bolt stays back. Free shipping for many products! The Marlin Model 1894 is a lever-action repeating rifle introduced in 1894 by the Marlin . We sell our items the way we find them - and leave any cleaning, repair or oiling up to the high bidder. Rear Sight Elevator - Stamped "B" - Original. These will have a "REP" proof mark on the right side of the barrel. by strongtower1 Fri Dec 16, 2011 6:28 am, Post Our site uses JavaScript for a smooth and modern shopping experience; we protect your data and never sell it to 3rd parties. For the best experience on our site, be sure to turn on Javascript in your browser. $69.95 . Marlin Model 60 Bolt Parts Complete Set .22 Lr New Style Bho Original 4. Description: Marlin Locking Bolt. $63.69. Of all tyrannies, a tyranny sincerely exercised for the good of its victims may be the most oppressive. Add to Wish List Add to Compare. Out of Stock Save. Additional information. I have ordered the first 2 parts from Numrich but the screw is not in stock. by chrifle Tue Dec 13, 2011 1:45 pm, Post Model 17 Brush Gun Model 17 Riot Gun Model 19 Model 21 "Trap"Model 24 Marlin "Trap Gun"Model 26 Model 26 Brush Gun Model 26 Riot Gun Model 28 Hammerless. Marlin Glenfield Model 60 70 795 7000 70pss Replacement Parts Buffer. Marlin Model 37 Takedown Slide Action Rimfire Rifles: 1913 - 1916. I may just have to try and make it, but I thought I would give the membership here a ring and see if something would come of it. This same locking block was also used in the . With the action open, it is easy to see the notch in the underside of the bolt where the locking bolt engages. It it were oversize (i.e., thicker or wider) it would not fit in the receiver. The parts listed in this section are specific to the Marlin rifles made post 2009. Official site for collectors of Marlin firearms, Moderators: Regnier (gunrunner), JohnK, Sure-Shot, Post This part is a Marlin factory OEM part made to the highest factory specifications, materials and standards. These will have a "REP" proof mark on the right side of the barrel. Model: 20A, 29, 37, 47. by Regnier (gunrunner) Thu Dec 02, 2010 10:41 pm, Post Save my name, email, and website in this browser for the next time I comment. Lift out the bolt and bolt lock together. This Marlin manufactured forearm screw is for the model 37 takedown slide action rimfire rifle and i.. The 20 is longer but don't know if the bosses are the same. online shopping has now gone a long way; it has untouched the quirk consumers and entrepreneurs get issue today. http://i400.photobucket.com/albums/pp88/timberbeast63/Firearms/Marlin99boltholdPic1.jpg, http://i400.photobucket.com/albums/pp88/timberbeast63/Firearms/Marlin99boltholdPic2.jpg, Scopes, Sights, Rings, Mounts & Other Optics. Marlin 20A locking bolt. Marlin F406305 : MAGAZINE TUBE 357MAG/38SPL 1894CB 20" BLUED GUNS . Numrich Gun Parts Corporation on the underside of the action you'll see 4 screws holding 2 rails with springs in them . Required fields are marked *. This BREECH BOLT is for the MARLIN .22 caliber Pump Action Repeating Ri For a better experience, please enable JavaScript in your browser before proceeding.

Tribute To A Friend Who Died Of Cancer, Samhsa Detailed Budget And Narrative Justification Template, Articles M

marlin model 37 locking bolt