LMT MRP-L MLOK 7.25″ Upper Receiver Chassis & 8.25″ 300BLK Barrel Combo LMT’s shortest and most compact 300BLK offering to date. Each combo includes one 7.25″ MLOK Upper Receiver (L7NX1A) and one 8.25″ 300BLK barrel (R-L7BX1B). The receiver and handguard are made from a single piece of aerospace grade aluminum. The barrel is held in place with a proprietary locking system that utilizes two locking bolts accessible from the right side of the receiver. The only tool needed is a standard T-30 Torx bit to tighten the bolts. This receiver sports 4 QD sling swivel attachment locations. Pistol length gas system and 1:7 twist.
