SIG SAUER® introduces the SB15 Pistol Stabilizing Brace, a shooter’s aid that is designed to improve the single-handed shooting performance of buffer tube equipped pistols.This veteran-designed and U.S.-manufactured accessory enhances accuracy and reduces felt recoilwhen using an AR-style pistol.Made from high-quality, elasto-polymer, the SB15 is manufactured to close tolerances and fits all pistolsequipped with an AR-style buffer tube 1.0” – 1.2” in diameter. The Pistol Stabilizing Brace uses theoperator’s forearm to provide stable support, thereby minimizing accuracy-robbing spin and shift. Aflexible cuff with two adjustable nylon straps allows the SB15 to be custom fit to any user.Features- Fits all pistols equipped with an AR-style buffer tube 1.0" - 1.2" in diameter.- ATF compliant*- Veteran designed- Made in USA- Quick and easy to install* ATF has reviewed this product and determined that attaching the SB15 to a firearm does not alter the classification of the firearm or subject the firearm to NFA control.
http://www.sigsauer.com/upFiles/ATF-Compliant-Letter.pdf