AIM Sports Inc AR15 Mil-Spec Buffer Tube Black Small Black Small. Specifications for AIM Sports Inc AR15 Mil-Spec Buffer Tube: Manufacturer: AIM Sports Inc Color: Black Gun Make: AR Platform Gun Model: AR-15 Features of AIM Sports Inc AR15 Mil-Spec Buffer Tube Fits standard AR15 and AR10/M5 (.308) lower receivers 7075 Aluminum Tube only (no endplate/buffer/spring) Uses a stardard end-plate and standard castle nut Package Contents: AIM Sports Inc AR15 Mil-Spec Buffer Tube What firearm models does the manufacturer say AIM Sports Inc AR15 Mil-Spec Buffer Tube is compatible with? The manufacturer suggests that AIM Sports Inc AR15 Mil-Spec Buffer Tube is compatible with AR-15AIM Sports Inc AR15BT: AR15 Mil-Spec Buffer Tube Black Small AR15BT Black Small