High-tube adapters are specialized adapters for law enforcement applications or competition. They feature a much higher stock elevation (equivalent to an AR-15) and require an optics rail (included),  Accessory mounting points on the sides of the High-tube aluminum adapters accept Picatinny rails, sling mounts or Mesa Tactical shell carriers, and are fitted with Timesert.

Kit Includes: M4 Stock, Crosshair™ 12ga Shotgun Shock Buffer, Stock Adapter, Hogue Grip, Rail, Push Button Sling Swivel, Wrench, and Screw pack.