Sniper MFLRS02-T Tan Tactical Smart Polymer Picatinny/Weaver Front and Rear Combo Set Flip Up Backup AR15 AR-15 M16 M4 M-4 Flattop A1 A2 Post Back Up Sight High quality flip-up front and rear sight towers complete with A2 square post assembly with locking Retention and precision elevation adjustments for greater accuracy Mounting decks designed to be used with handguard rails or front gas blocks (front sight tower) and both will fit all 7/8 inch Picatinny/Weaver style rails Allen wrench with locking Retention for maintaining zero under heavy conditions Easy and quick installation Color is tan