The LMT Monolithic Rail Platform (MRP) upper receiver is a groundbreaking innovation in firearm design, offering unparalleled strength and precision. Crafted from a single-piece of forged aerospace-grade aluminum, this receiver and handguard combination ensures maximum durability and rigidity. The unique design features a proprietary locking system that secures the barrel with two easily accessible locking bolts on the right-side, requiring only a standard T-30 Torx bit for installation and maintenance. This advanced receiver is compatible exclusively with the patented LMT monolithic barrel assembly, which includes a low-profile gas block and a straight gas tube for optimal performance. The MRP-L QUAD 13-1/4 inches model is specifically engineered for rifle length applications, accommodating barrels ranging from 14-1/2 inches - 20 inches. It features a quad rail system at the 3, 6 and 9 O'clock positions, providing versatile bipoding options for accessories. Additionally, the receiver is equipped with five QD sling swivel attachment points, offering flexibility and convenience for various tactical configurations. Please note that the barrel is not included with the receiver. This innovative platform is designed for those who demand precision, reliability and adaptability in their firearm systems.

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Shipping Restrictions

It is the customer’s responsibility for understanding state laws regarding all purchases made. For a comprehensive list of all Shipping Restrictions, please refer to our Shipping Restrictions By State Page found Here.

All NFA Rules Apply

These items are controlled by the U.S. Government and authorized for export only to the country of ultimate destination for use by the ultimate consignee or end-user(s) herein identified. They may not be resold, transferred, or otherwise disposed of, to any other country or to any person other than the authorized ultimate consignee or end-user(s), either in their original form or after being incorporated into other items, without first obtaining approval from the U.S. government or as otherwise authorized by U.S. law and regulations.

Local Law Compliance

Certain firearm parts and accessories, including AR-style upper receivers, are subject to complex and frequently changing federal, state, and local laws and regulations. While an upper receiver may be lawfully sold and shipped as a component, the legality of possessing, assembling, configuring, or using an upper receiver in certain states (e.g., California, Washington State) and localities depends on how it is assembled, combined with other components, and ultimately used. You are solely responsible for ensuring that any assembly, configuration, possession, or use complies with all federal, state, and local laws, including any so-called “assault weapon” bans and short-barreled rifle restrictions. We do not provide legal advice and are not responsible for unlawful configurations or uses.