The XS AR Upper Receiver Block is designed to allow the user to hold an AR-15/M4, AR-10, SR-25, or DPMS GII upper receiver in a bench-mounted vise for assembly, modification, and maintenance. This upper receiver armorer's block will allow the gunsmith or enthusiast to assemble, modify, or maintain almost every AR-pattern modern sporting rifle. While most blocks will only fit one specific style, the XS block provides the versatility needed to work on any AR pattern upper receiver AR-15, AR-10, SR25, or DMPS GII. This versatility, plus the reliability of an XS Sights Made in the USA 6061 T6 aluminum product, is a one size fits all solution.
Note Will not work for ARs in .300 Win Mag or 12 ga.