Guntec USA AR-15 Mil-Spec Buffer Tube Set w/Heavy Buffer

Guntec USA AR-15 Mil-Spec Buffer Tube Set w/Heavy Buffer. 4 oz Heavy CAR Buffer & Upgraded Chrome Teflon CoatedSpring T6 Aluminum Six Position Buffer Tube Specifications for Guntec USA AR-15 Mil-Spec Buffer Tube Set w/Heavy Buffer: Manufacturer: Guntec USA Color: Black Gun Make: AR Platform Gun Model: AR-15 Additional Features: w/ Heavy Buffer Package Contents: Guntec USA AR-15 Mil-Spec Buffer Tube Set w/Heavy Buffer What firearm models does the manufacturer say Guntec USA AR-15 Mil-Spec Buffer Tube Set w/Heavy Buffer is compatible with? The manufacturer suggests that Guntec USA AR-15 Mil-Spec Buffer Tube Set w/Heavy Buffer is compatible with AR-15GUNTEC USA MILTUBESET-H: AR15 Mil-Spec Buffer Tube Set w/Heavy Buffer