This is a Bore-Up Piston Head by SHS

stable accuracy and velocity

Weight: 2240g

OVERALL LENGTH: 31" - 34

No winding needed

KRISS Arms DS150 Stock for AR15 Rifles (Color: Flat Dark Earth) model This is a Bore-Up PistonFeatures Extremely rugged injection molded polymer construction Heavy duty rubberized butt pad with anti slip texturing Ambidextrous QD sling points Oversized textured adjustment cam can be used in the most adverse conditions For use with Mil Spec buffer tubes Color: Black Dimensions: 7" x 5. 5" x 1. 5" Length: 7" Compatibility: Mil Spec AR15 buffer tubes Material: Injection molded polymer Manufacturer: Kriss Arms