Armaspec AR15 BBS Braided Buffer Spring SS/Black. The Armaspec Braided Buffer Spring - BBS provides improved performance reliability and functionality to your standard mil-spec buffer spring. You will experience a smoother quieter and more reliable weapon system. The braid is designed with 51 active coils to give tighter tolerances while being compressed and the three strand design allows for the energy from the bolt carrier to be absorbed and dispersed evenly during cycle time. Utilizing this technology gives you more than double the life of a standard mil-spec buffer spring. The BBS will fit over standard buffer weights it can be paired with most buffers on the market. The BBS is for the use with standard carbine length buffer tubes. It is NOT compatible with rifle length A5 buffer tubes or receiver extensions. Specifications for Armaspec AR15 BBS Braided Buffer Spring: Manufacturer: Armaspec Color: Black Gun Make: AR Platform Gun Model: AR-15 Gun Type: Rifle Condition: New Country of Origin: USA Features of Armaspec AR15 BBS Braided Buffer Spring Do not try to snap the spring onto the ledge on the buffer weight like standard springs; just slide on buffer it should sit on the top of the ledge. If you are using the spacer make sure the spacer goes on first then install the spring. Is for the use with standard carbine length buffer tubes. It is NOT compatible with rifle length A5 buffer tubes or receiver extensions. Package Contents: Armaspec AR15 BBS Braided Buffer Spring What firearm models does the manufacturer say Armaspec AR15 BBS Braided Buffer Spring is compatible with? The manufacturer says that Armaspec AR15 BBS Braided Buffer Spring is compatible with AR-15Armaspec ARM181-AR15: AR15 BBS Braided Buffer Spring SS/Black