Courtesy of Breach Bang Clear Down’n’Dirty: Forward Controls All Angles Augmented Bolt Catch ABC/R-AA Military Morons The ABC/R-AA (Augmented Bolt Catch/Release – All Angles) is a variant of the ABC/R [note: previously reviewed here, Mad Duo] with dimples on the control surfaces instead of horizontal serrations. Everything else is the same. The horizontal serrations on the […]