Booligan Airsoft & Shooting Sports features the Shockwave Blade 2.0 Pistol Brace for AR Pistols. Not sure though if you can readily fit this with AR pistol-style AEGs... "If you're running an AR pistol, you probably want a brace of some sort, and Shockwave Technologies has recently released their new and improved version of their ubiquitous Blade system. I'm in love with this thing."