Mitchell Defense Enhanced Carbine Flat-Wire Buffer Spring Silver. Its flat-wire design resists compression fatigue maintaining consistent performance across thousands of cycles. Compatible with both carbine and A5 buffer systems this spring enhances reliability in suppressed and unsuppressed setups and is ideal for shooters who demand long-term durability. Specifications for Mitchell Defense Enhanced Carbine Flat-Wire Buffer Spring: Manufacturer: Mitchell Defense Color: Silver Fabric/Material: Steel Gun Make: AR Platform Gun Model: AR-15 Gun Type: Rifle Features of Mitchell Defense Enhanced Carbine Flat-Wire Buffer Spring Flat-wire construction for extended compression life Reduced spring resonance for smoother recoil impulse Consistent performance across suppressed and unsuppressed setups Compatible with carbine and A5 buffer systems Package Contents: Mitchell Defense Enhanced Carbine Flat-Wire Buffer Spring What firearm models does the manufacturer say Mitchell Defense Enhanced Carbine Flat-Wire Buffer Spring is compatible with? The manufacturer says that Mitchell Defense Enhanced Carbine Flat-Wire Buffer Spring is compatible with AR-15Mitchell Defense 641001: Enhanced Carbine Flat-Wire Buffer Spring Silver