Tag Archives: multi caliber ar

By David Crane defrev (at) gmail (dot) com Several weeks ago, DefenseReview had an interesting conversation with Ralph Lermayer, Editor of

by David Crane [email protected] Back in February (2006), DefenseReview briefly discussed the new and improved MGI QCB (Quick Change Barrel) Upper Receiver system and MGI D-Fender "D-Ring" in our article titled DefRev Quick Hits 3 from SHOT Show 2006: And the Hits Keep Comin’. We got to handle and examine both of these items, as well as MGI’s Modular Lower …