The SBA4 Pistol Brace is improved with new features that make it much more ergonomic and comfortable to use on any pistol that can accept a Mil-Spec buffer tube. It features 5 positions of adjustment and has an ambi QD sling socket. Another improvement this model has is the M4 style shape that improves rigidity. The adjustable strap wraps around your forearm and the adjustable length of pull makes it easy to use no matter your arm length. Or simply use it braced against your cheek for more accurate shots. Building a compact AR Pistol has never been easier with the SB Tactical SBA4 Arm Brace.