This factory-original upper assembly from FN is designed for the FN-15 TAC3 modern sporting rifle system. This upper system features an 16" government profile barrel with a 1:7 twist rate and an A2-style muzzle break. This assembly includes a mid-length gas tube and gas block, an M16-style bolt carrier group, and an ambidextrous Radian Raptor-LT charging handle. A 14-5/8" free-floating handguard completes this assembly by offering one continuous Picatinny rail section down the 12 o'clock position.