Calibers: 5.56 NATO. Similar to other Franklin Armory offerings but with billet lower. Incorporates integrated ambidextrous, anti-rotational Quick Detach sling mounts. Textured Memory Index Point, enlarged and beveled magazine well, integral over-sized triggerguard. Front of the magazine well is also textured so it can be used as a grip for forward support. Carbine length, 6-position collapsible stock. Barrel: 16 in. M4 Contour 1:7 RH twist. Handguard: 15 in. FSR. Sights: Magpul MBUS. Mid-length gas system. Stock: Magpul CTR. Grip: Ergo Ambi Sure.