Aluminum AR Magwell easily attaches to any Millspec GI Lower with minimal Fitting and immediately you are reloading like A Pro. Specifically designed for the various mags each shooter prefers, this Magwell is compatible with everything we’ve tried, including singled or coupled GI, Troy, Lancer or Pmags, and Surefire 60 rounders. The GB Customs Magwell decreases the time and concentration taken away from the Tactical shooter during a bolt lock reload. “The less I’m concentrated on the reload the more focused I am at the task at hand.”