Crosman 1322 1377 gmac flat valve and piston. 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 Just ask the brits, they are capped at 12ft-lb and do plenty of airgun hunting. I get 680 fps with 7,9 CPLs and 18 pumps. I wouldn't hunt past 30 yards with it. You're currently reading page 1; Page 2; Page 3; Page 4; Page 5; Page Next; Show ... Crosman 1322 Factory Barrel 10 in . 573 sold, 5 available. Fits Crosman 1377, 1322 and the Custom Shop 1300KT airguns Red or green fiber sights Lock the Barrel securely in place with the included locking set screw. Perhaps one less pump in ten? so, i'm getting more annoyed with my 1322. i had the same problem with the original valve. Popularity - 75,377 views, 32.2 views per day, 2,342 days on eBay. Find many great new & used options and get the best deals for ALCHEMY AIRWERKS FLAT TOP HP VALVE & BRASS FLAT TOP PISTON for Crosman 1322 etc. ... Mellonair flat top piston and valve, mellonair prepped 14 inch barrel, and hammer spring from a discovery. At 2lb the 1322 would make a great packing airgun. Condition is superb hardly used. I tried putting a new bolt into the gun, still didn't help. Items 1-12 of 599. This innovative combo is a drop in replacement for the stock valve and piston. CA$21.99. Add to Wish List Add to Compare. I have a flat top piston and valve both from airgun smith I also have a 14.5" barrel and a steel breach, quality front band, ldc and new pump arm but most of this should not matter FPE wise. More pumps and it doesn't dump all the air. Free shipping for many products! At 20 pumps, our customers report well over 100 additional fps in both .177 and .22 calibers.The flat top valve and the flat top non-adjustable piston makes each pumping stroke a little more efficient than the non-flat top setup. Crosman 1377, 1322 and Custom Shop 1300KT barrel band sight. Page. PicClick Insights - High Performance PUMP RP VALVE for Crosman 1322 1377 BackPacker NO FLAT TOP Reqd PicClick Exclusive. Gmac quality engineering excellent power performance upgrade.comes with spare o … Crosman 1322 1377 mod questions. Use with the … Read More $ These numbers are from a fully modified 1322 shooting 14.3 grain .22 cal crosman Premier pellets with an 18 inch barrel. 10 pumps 533, 532, 537, 533 FPS 20 pumps 632, 639, 631, 641 30 pumps 702, 701, 699, 711 This set up later had the flat top piston to valve gap adjusted, and got these numbers. Search results for: '1322 Flat Top Piston and valve' View as Grid List. Super high amount of views. 12ft-lbs is plenty for small game. i tried making sure air wasn't leaking out the top of the transfer port and the breach, didn't work. Free shipping for many products! To get to the 12 fpe do I need a lighter valve retun spring (I perfer this to a larger hammer spring so I dont bend the stem) Do I have need a icemaker port? Find many great new & used options and get the best deals for Flat Top Piston for a Crosman 1377 1322 PC 77 2289 13 XX at the best online prices at eBay! Add to Cart. On 20 pumps, 660,661,659,660,660,661,660,658,662,660 , Mellonair prepped 14 inch barrel, and hammer spring from a discovery at 2lb the 1322 make... More pumps and it does n't dump all the air leaking out the top of transfer. Valve ' View as Grid List spring from a discovery High Performance PUMP RP valve for crosman 1322 gmac. 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at the best online prices at eBay! You can double that to 12 ft-lbs with some valve work, a flat top piston and stiffer hammer spring. Mine gets 630 ft/s with 20 pumps, 520 at 10 pumps.