Check the listing for details. ATI / GSG / Sig / Mauser Enhanced Recoil System for the 1911 22LR. Condition: New. Listed at 19.95 USD. Sig & GSG 1911-22 Full Length Guide Rod / Recoil Spring & Recoil Buffer Our full length guide helps with reliability in a way no other competitors parts do. Not only does the full length rod alleviate bind that can occur with the shorter factory guide rod, but the aluminum base on ours has been modified to give the slide more rearward movement. The added movement allows the slide to travel farther rearward allowing for more reliable feeding from the magazine. This enhancement package will work for the Mauser, Sig Sauer or ATI GSG (German Sport Gunworks) 1911 22LR pistols. See my other listings for more GSG parts as well as Basepads. Sig Sauer, Mauser and ATI GSG (German Sport Gunworks) 1911 22LR pistols1 x Stainless Steel Full length Guide Rod with Enhanced Aluminum Base1 x Chemical Resistant Polyurethane Shock Buffer1 x Recoil SpringNOT A MAGAZINE OR GUN