Tag: str-556

Was Ruger Developing an AR-15 Automatic Rifle?

Posted January 28, 2012 in Rifles by Steve Johnson with 20 Comments

A Ruger patent for a “Firearm Barrel Retaining System”, filed in 2009, was published by the USTPO yesterday. The patent application (#20120017483) describes a quick change barrel system that includes an old school machine gun carry handle that help [Read More…]