Tippmann Arms Company M4-22 Redline, Semi-automatic Rifle, AR, 22 LR, 16 Red Barrel, TandemKross Gamechanger Pro Compensator, Matte Finish, Black with Red Accents, Composite Free Float M-LOK Handguard, M4 Collapsible Stock, TandemKross Black and Red Hive Grip, Front/Rear Flip Sights, 25 Rounds, 1 Magazine A101111 The M4-22 REDLINE is a joint collaboration between Tippmann Arms and Tandemkross with a goal to offer the M4-22 in a competition ready configuration. The M4-22 REDLINE features the TK Game Changer PRO Compensator and the ultra-comfortable TK AR15 hiveGrips, 16 inch red Fluted barrel, and red accents. The M4-22 REDLINE a premium .22 caliber semi-automatic tactical rimfire rifle with aluminum upper and lower receivers and all the features of a true M4. The M4-22 REDLINE is largely mil-spec compatible and will accept most AR15 stocks, handguards, and sights. The M4-22 REDLINE has the look, feel and controls of a true M4.