The Armaspec A5 Spacer is designed specifically for AR-15 rifles with A5 style stocks providing precise 0.75" length spacing for optimal buffer system performance.Armaspec A5 Spacer for AR-15 rifles0.75" length for precise spacingCompatible with A5 style stocksDesigned for Stealth Recoil Spring (SRS) systemsWorks with Sound Mitigation Buffer (SMB) systemsSKU: ARM154-RFLA5Essential component for AR-15 builders and enthusiasts looking to optimize their rifle's buffer system performance with Armaspec's Stealth Recoil Spring or Sound Mitigation Buffer in A5 configurations.