The SBM4 Pistol Stabilizing Brace is the evolution of the original SB15 . Thinner, lighter and with enhanced cheek weld ergonomics. The SBM4 provides increased stability, improved accuracy and usability. Product Features ATF compliant, US veteran designed and proudly made in the USA Product Includes: brace, adjustable nylon strap Product Specifications Fit: All platforms equipped with an AR-style pistol buffer tube Length: 7.2 in Weight: 8.4 oz Width(Max): 2.1 in Diameter Compatibility: 1.1-1.25 in Strap Width: 1 in