Aero Precision AR15/M4 Carbine Buffer Kit No Stock H3 Buffer Black. This kit includes a Buffer and is designed to increase reliability in rifles carbines or pistols with short gas systems. These parts would be perfect for your new build or as direct replacements for worn out parts. Specifications for Aero Precision AR15/M4 Carbine Buffer Kit No Stock: Manufacturer: Aero Precision Color: Black Fabric/Material: 7075-T6 Aluminum Gun Model: AR-15 Length: Carbine Condition: New Country of Origin: USA Package Contents: Aero Precision AR15/M4 Carbine Buffer Kit No Stock Mil-Spec 7075-T6 Aluminum Buffer Tube 6-position Carbine buffer Carbine Buffer spring End plate and lock nut What firearm models does the manufacturer say Aero Precision AR15/M4 Carbine Buffer Kit No Stock is compatible with? The manufacturer suggests that Aero Precision AR15/M4 Carbine Buffer Kit No Stock is compatible with AR-15Aero Precision APRH100960C: AR15/M4 Carbine Buffer Kit No Stock H3 Buffer Black