Non-adjustable piston. My 1377 is a very accurate gun. Crosman 1377 Mods Collection by Cody Lawhorn. And yes there are a lot of things you can do with a 1377. If you order the flat top piston and valve combo is does everything in one shot, just check the transfer port size while you have it apart. For Crosman 1322 1377 PC77 2289 P1322 P1377. You can buy a refurbished one for as little as $50, put a shoulder stock on it, a steel breach to mount a scope onto, a longer barrel and a flat top piston. Many of the ideas presented here also apply in one shape or form to other airguns as well. Relevance. Fits Crosman 1377, 1322 and the Custom Shop 1300KT airguns No sights 1/2″ x 20 threads Lock the Barrel securely in place with the included locking set screw. 50. Favorite Answer. Crosman 1377, 1322 and Custom Shop 1300KT barrel band sight. Recently the fully modified Crosman 1377 model, 2289G or 1389 has caught my eye. Why mod the Crosman 1377? Crosman Mod.1377 Plastic Barrel Rail $8.00 CAD Crosman Mod.1377 Pump & Pump Aim Pin $20.00 CAD Crosman Mod.1377 Set of Plastic RH & LH Grip Panels with Screw $20.00 CAD Crosman Mod.2240 Back Sight Complete $10.00 CAD It was doing 3.2 ftlbs! Crosman 1377 piston and valve mods - YouTube. Crosman 1377- love the shroud. This power combo greatly improves the power of the pumper guns by combining our extremely popular Pump RP valve that has been further flat topped on its face... and our NEW (Oct. 2016) solid BRASS non-adjustable flat top piston.Yes, you read that right. 2100 w/solid piston, bolt probe seal, TP seal, 1760 barrel, integrated silencer 1377 w/2100 pump assembly, 1760 barrel, TP seal, steel breach, custom stock 2240 w/valve mods, steel breach, TP seal, 13" barrel, bolt probe, hammer spring adjuster Would love to shoot the breeze sometime. Get the best deals for crosman 1377 pistol at eBay.com. This valve adds.Put a stronger hammer spring, an ... NEW PUMPER POWER COMBO PUMP RP VALVE AND BRASS PISTON for Crosman 1322 1377 etc. I don't have the tools … Skip navigation ... Crosman 1377 piston and valve mods - … And he speak about change We have a great online selection at the lowest prices with Fast & Free shipping on many items! $62.88 Buy It Now 13d 1h. ... 1377, 1322, PC77, 1300KT & 2289G BACKPACKER $ 12. Crosman 1377 piston and valve mods. Here, for example, is a near-stock 1377, apart from a non-adjustable but "stuffed" piston, and debouncer. UPGRADE PISTOL GRIPS for Crosman 13XX & 22XX HIGH PERFORMANCE PUMP RP VALVE for Crosman 1322 1377 BackPacker NO FLAT TOP Reqd - $42.66 ... and it costs less.Modders know that getting a little more from each mod can really add up. Our piston is machined the exact correct length so that when used with our flat top valve it is always plug and play. ...in the stock 1377 (i.e., 0.1ci : 0.26ci), your results aren't really surprising. CUSTOM CROSMAN & BENJAMIN AIRGUN PARTS. In a files for modicate 1377 that Jon Walls send me. Testing out the new modifications done on my crosman 1377. ... trigger kit, longer barrell, upgraded barrell band and maybe some piston/valve mods. well, if you have 10 extra bucks, you can put a flat top piston and valve in the gun. Which of the available mod kits is the best? It's making 5.7 ftlbs I bought a brand new 1377 (the one with the black plastics). First mod was trigger and sear po 24 ... Upgraded trigger, spring, piston, valve, breech, and fore grip. Yes, you read that right. The custom piston pin is machined from tool steel with radiused ends to match the internal tube contour. 22XX Power Valve Mods. Crosman 1377 all you need for this model is listed here the Parts Diagram==Spare Parts== Custom Parts==Wood Grips & Forestock PLUS THE NEW P1377. A rigid piston helps too (metal). I am planning a project and would like to know what pressure can the 1377 pump pistol develop in the valve. Getting the Most Out of Your 22xx These mods work specifically with the Crosman 2240, 2250, and 2260. I used to sell something called the Hard Mount C, that I stopped selling because it looked sketchy with similar reliability. These mods WILL make a 1377 PAL rated! FYI, they will hold. A person tell the modifications that he made in a 1322 pistol. Klayton Kidd uploaded this image to '1377c'. Hand Guns Diy And Crafts Youtube Pistols Youtube Movies Revolvers. I have an early phase III 1377 (bolt action) pistol - I've converted it into a carbine with a QD shoulder stock and it's very good indeed. Share with: Link: Copy link. Fully adjustable with the highest quality viton duro. Where can I get wood grips for the 1377 for a cheap price (Under 20$). 00. Outdoor Tv Antenna Shops Chicken Bites Air Rifle Paintball Rifles Shotgun Nerf Outdoor Power Equipment. ... 1377 Flat Top Piston is easy to install and can increase performance. The Green Crosman Forum > TheGreenCrosmanForum > Crosman Airgun ... and valve seals capable of holding such pressures. Sold Out. FLAT-TOP VALVE & PISTON for Crosman 1377, 1322, 1300KT, 2289G - EXTREME POWER ! Crosman Mod.1377 Breech Top w Bolt. However, you might consider trying air conservation. The Green Crosman Forum > TheGreenCrosmanForum > Crosman Airgun Forum > 1377 piston and valve mod. Saved by paul lai. Cody Lawhorn. Also, are the 1377's grips and stock hollow ... 4 Answers. 1377 Diagram & Spare Parts 1998-Present . It felt the same to pump, same effort required but it just made that power. #Airgunscan be modified even by me. I've been looking up all the 1377 mods posted here and have done a number of them, but my performance has gone down. Hi all. ... MAGNUM 13XX FLAT-FACE VALVE & PISTON SET $ 89. ! Porting and barrel are absolutely bone-stock, and the valve has never been out of the gun. 90. orings, A must have for 13XX owners. I've done the usual squash-the-sear-spring mod but it's still creepy and notchy. Now it's just the trigger that lets the show down. Non-adjustable piston. Crosman 1077 Powerlet Conversion Kit Hard Mount D: Here is another one of my adapter kits. Cody Lawhorn. because you can Seriously for some people half the fun of airgunning is the modifications. 2 posts 1377 piston and valve mod 1377 piston and valve mod. Crosman 1377. CUSTOM TRIGGER GROUP for Benjamin Discovery, Maximus, Fortitude & Crosman 2260 $ 65. Use with … Read More $ Jonathan. Details. alright, here is my crosman 1322: flat top PISTON and VALVE buy a set from ebay 24" benjamin discovery barrel steel breech leapers bug buster skeleton stock, if i had to do this again i would buy an AR stock adapter, with said stock backpacker forearm all that adds up to 550 fps with 15 pumps. Is the GMac one any good? 9oz tanks are on the way and will probably work well, too. 00. I've sorted the valve TP and hammer spring and it's running a nice 5.2 ftlbs with JSBs. 9 years ago. Share. You would need to cut coils off the hammer spring to get it back under if you were concerned about that. Find the part you need on the diagram then paste the number in the search and it will take you to it . by 100 fps. The valve body, cap and piston head are machined from 7075 aluminum. Details. This direct bolt on ... hammer strike on the valve resulting in more FPS by keeping the valve. Cheapest mods for Crosman 1377? Similar to my Streamlined Kit, this is a lot cleaner looking and is utilizing a 12oz CO2 (shown in photos). I'd done some reading and seen mention of reduced transfer port sizes. Forums › Air Pistols › Air Pistols – Discussion › 1322 flat top valve and piston question Views : 314 Likes : 0 Likes : 0 | Subscribe August 2, 2020 at 11:08 am Link Mark2282Participant Member I would really like to do some power mods on my Crosman 1322. 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