MRP-H M-LOK 7.62MM ASSEMBLED UPPER RECEIVER The patented LMT Monolithic Rail Platform, MRP(TM) upper receiver. 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 requires the patented LMT monolithic barrel assembly which has a low profile gas block with straight gas tube. The MRP-H monolithic upper receiver for large caliber rifle platforms. Created with M-LOK compatible attachment points on all 8 sides. Utilizes two lo Mfg: Lmt Defense