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.