ATF Clarifies Legality of AR Pistol Arm Brace UsePosted on April 25, 2017 by Dean Weingarten Arizona – -(Ammoland.com)- Late in 2012, the ATF approved of a device that fit on the buffer tube of AR-15 style pistols. It made one handed shooting of these firearms much easier, and hence more accurate. The SB15 was invented by a disabled veteran, Alex Bosco. He quickly sold the rights to produce the arm brace to Sig Sauer. As you can see, the device can also be used as a very short stock for the AR-15 pistol, even though that is not what...