Armaspec Stealth Recoil Spring Big Bore Gen 4 SS/BLK

Armaspec Stealth Recoil Spring AR-15 SRS-9 9mm Luger Black/Silver. The Stealth Recoil Spring is designed to reduce felt recoil as well as keep the buffer spring from rubbing against the inner wall of the buffer tube. The buffer mass is designed to stay under constant tension against the bolt carrier and the O-ring on the head of the buffer mass prevents metal on metal contact. SRS-Carbine at about 3.3oz equivalent SRS-H at around 3.8oz equivalent SRS-H2 at around 4.7oz equivalent SRS-9 at around 5.3oz equivalent and SRS-H3 at around 5.6oz equivalent and SRS-308 5.7oz. Pat. Pend. COMPATIBILITY: AR-15 with carbine-length buffer tube Most bolt carriers have a rear opening of over .60 there are a couple of bolt carriers in the market place that have a rear opening of under .60 and will not function with the SRS. 9mm Bolt Carriers ONLY: For proper function of the SRS-9 in your 9mm rifle or pistol the extra weight on the back of the bolt carrier needs to be removed. It is held in with a spring pin. Specifications for Armaspec AR-15/AR-10 Stealth Recoil Spring: Manufacturer: Armaspec Color: Black/Silver Model: SRS-9 Gun Make: AR Platform Gun Model: AR-15 Weight: 6.4 oz Additional Features: 9mm Luger Included Accessories: Standard Condition: New Features of Armaspec AR-15/AR-10 Stealth Recoil Spring: Drop-in replacement for standard buffer and spring; Reduce felt recoil; Keep the buffer spring from rubbing against the inner wall of the buffer tube; Buffer mass is designed to stay under constant tension against the bolt carrier. Package Contents: Armaspec AR-15/AR-10 Stealth Recoil Spring What firearm models does the manufacturer say Armaspec AR-15/AR-10 Stealth Recoil Spring is compatible with? The manufacturer suggests that Armaspec AR-15/AR-10 Stealth Recoil Spring is compatible with AR-15Armaspec ARM153-9: Stealth Recoil Spring AR-15 SRS-9 9mm Luger Black/Silver