Glock G20 G21 Gen 4 Recoil Spring Assembly 10mm .45 Acp Mpn 30077

The Glock Recoil Spring Assembly for G20/G21 Gen 4 pistols is a direct-fit replacement engineered to restore crisp slide cycling and reliable function for 10mm and .45 ACP shooters who put hard use on their pistols, whether on the range, in the field, or on duty. This OEM-style recoil spring assembly matches the Gen 4 factory spec for spring tension and guide length, helping manage the strong recoil impulse of the G20 series 10mm and G21 .45 ACP platforms while reducing battering on the frame and slide rails, which is especially useful for high-round-count training sessions, hunting trips, or competitive strong-hand shooting. If you run a suppressed or threaded-barrel setup on your Glock, maintaining the correct recoil spring is critical for consistent cycling and reliable ejection, and this assembly keeps your Gen 4 Glock operating within its intended timing window. Made by Glock for their modular Gen 4 models, this recoil spring assembly is an essential maintenance part for owners who value consistent function, longevity of components, and smooth follow-up shots with their G20 or G21.