Q Sugar Weasel, Semi-automatic, Rifle, 223 Remington/556NATO, 16 Barrel, 1/2x28 Threaded, Anodized Finish, Black, Magpul SL-K Stock, 15 Free Floated M-LOK Handguard, 30 Rounds, 1 Magazine SW-556-16IN-RIFLE-BLK The Q Sugar Weasel rifle is a 16-inch direct impingement rifle chambered in 5.56 NATO. It is built on a M16 spec receiver set (no forward assist), and features a 1:7 twist barrel, Cherry Bomb 2-Piece Flash Hider, adjustable gas block, Literally The Best Trigger Ever Made and 6-position receiver extension that houses a carbine length action spring and buffer and is topped off with a Magpul SL-K stock.