Magpul BDA Arm Brace Black AR15/M4 Compatible W/ Mil-Spec Pistol Amb. An integrated rear QD cup provides ambidextrous sling mounting options and the braces large lateral surface area supplies plenty of forearm contact. Combined these features allow application of sling tension drastically increasing single-handed control of the firearm. With a straight-forward design and Magpul innovation the BDA Arm Brace is a simple solution to improving your AR pistol. Specifications for Magpul MAG1251BLK BDA Arm Brace Black AR15/M4 Compatible W/ Mil-Spec Pistol Amb: Manufacturer: Magpul Industries Hand: Ambidextrous Magpul MAG1251BLK BDA Arm Brace Black AR15/M4 Compatible W/ Mil-Spec Pistol Amb