Comes with free polymer buffer tube Features High quality polymer construction with rubber butt pad Side battery storage compartments fit many crane stock / nunchuck / butterfly-type batteries Ambidextrous QD sling swivel mounts as well as slots for non-QD slings Flared cheek rest for a comfortable weld when aiming Manufacturer: ZCI Specifications: Compatibility: Fits Airsoft and real Mil-spec sized M4 / AR series buffer tubes Material: High-durability polymer, Rubber Check out my page for other items of interest! I