Specifications: - Caliber 5.56 NATO (.223 REM) - Carbine length gas system - 16" Barrel with a 1:7 twist rate - Overall length: 32.5 - 36" - 6.09 LBS w/o magazine - Salt Bath Nitride MPI bolt carrier group - A2 Birdcage flash hider 1/2 x 28 - 7075 Forged A4 Flat top optics-ready upper receiver - 7075 Forged XM15-E2S™ lower receiver - Milspec trigger   Features: - MOE SL® Hand Guard, Carbine-Length - Magpul® PMAG® 30 AR/M4 GEN M2 MOE® - Magpul® CTR® Carbine Stock - Magpul® MOE® Grip - Magpul® MOE® Enhanced Polymer Trigger Guard - Detachable Carry Handle - F-Marked A2 Front Sight