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 We don't list older 13XX pump forearms, only the current Crosman Custom Shop & P13XX style shown in the photos.

 The no-wobble model 1399 shoulder stock has a felt pad inside that keeps it mounted straight and tight. The felt pad is an upgrade we add that works extremely well and lasts indefinitely. We've been mounting these this way since 2009 and haven't heard of one loosening to date. They fit all versions of the 1377, 1322, 2289, 2240, 2250, 2300T, 2300S, 2300KT, 2400KT, 1300KT, Marauder Pistol and similar models. The 1399 Custom Shoulder Stock is the standard stock issued with 2250B, Crosman Custom Shop and Marauder Pistol models. It's the same as the 2289G Backpacker stock except it has screw holes to mount it firmly to the grip frame.

 The 22XX forearm, barrel band and forearm mounting bracket are Crosman Custom Shop 2400KT parts also original to the 2250B. They will fit 2260 if you convert to a pistol trigger group and Discovery models if you install our Gauge Bypass Cap on the valve which eliminates the pressure gauge. The forearm mounts to the barrel band and bracket with two forearm mounting screws. The bracket mounts to the front of the trigger frame, the frame screw goes through the larger hole in the bracket. That screw needs to be 7/16" long, the standard length of an original front trigger frame screw. All of these screws can be selected in the STANDARD CROSMAN SCREWS listing and upgrades are included with our custom alloy-steel socket screw kits.

 The 13XX forearm is the newer style that mounts to the pump lever with screws instead of pins. The lever has threaded holes for the screws. These parts are standard on the P1377, P1322 and Crosman Custom Shop 1300KT. They are a perfect fit for all versions of the 1377, 1322, 2289G Backpacker and PC77 if you use the original tension pins or you can upgrade to the pump lever with threaded holes and use screws to mount it. It matches the 1399 stock and 1701-P pistol grips we have listed. The screws for mounting this forearm have a head on them and will damage the forearm if over-tightened. They should only be snugged down lightly, medium-strength threadlocker can be used to keep them from loosening if that becomes an issue. The factory screws are listed in the Crosman Factory Screws category. Upgrade screw kits are also listed in Custom & Upgrade Parts.