ProShot 3 Piece AR Platform Service Kit for Mil-Spec AR-15 5.56mm/.223. 56mm/.223 Cal. Rifles The Pro-Shot AR Platform Service Kit is a Simple Superior Patented System for Cleaning Servicing or Building your AR Platform Rifle. Place in your range bag or use on your bench this is one of the most handiest AR tools you will ever use The Pro-Shot Sentinel Base Plate is an interchangeable system that accepts our patented magazine post system. Its ideal to hold your rifle for cleaning building or servicing to hold the lower receive while you assemble rifle. Excellent for displaying your favorite AR platform rifle The Pro-Shot AR15/M4 Magazine Post firmly holds your Mil-Spec rifle and assembles directly into the Sentinel Base Plate. Made of tough polymer it will not scratch or mar your rifle. The Pro-Shot AR Hook acts as a "third hand" to Hook the upper receiver and pin to the lower with the take down pin. The top of the AR Hook works as a rod guide and makes cleaning AR Platform rifles fast & easy to clean. Specifications for ProShot 3 Piece AR Platform Service Kit for Mil-Spec AR-15 5.56mm/.223: Manufacturer: Pro-Shot Caliber: 5.56mm .223 Remington Package Contents: ProShot 3 Piece AR Platform Service Kit for Mil-Spec AR-15 5.56mm/.223 ProShot AR-SKIT: 3 Piece AR Platform Service Kit for Mil-Spec AR-15 5.56mm/.223