The LMT monolithic Rail Platform (MRP ) employs a patented design, crafted from a single-piece of aerospace-grade aluminum forging, representing the only true monolithic Rail Platform. It features two side-accessible locking bolts on the receiver securing the barrel extension with a 360 degree engagement. This innovative technology allows for rapid barrel removal and reinstallation, ensuring a consistent return to zero. The system supports multiple barrels of varying lengths, materials and calibers. The upper receiver is equipped with an 18-1/2 inches uninterrupted 1913 picatinny rail at the 12 o'clock position, while the remaining seven sides offer M-LOK compatible attachment points. The monolithic Rail Platform barrels a redesigned with a low-profile gas block and straight gas tube, featuring a proprietary coating and cryogenic treatment for enhanced durability. The MARS-L ambidextrous lower receiver includes an LMT ergonomic textured grip and SOPMOD stock, with ambidextrous controls for the bolt catch, magazine catch and safety selector. Consistent with all LMT lower receivers, the extension tube is treated with a dry film lubricant. The weapon system is supplied with three grip panels, one magazine and an owner's manual.

MRP upper receiver assembly
Dual-sided charging handle
S-A bolt carrier assembly
MARS-H lower receiver - a precision-engineered component designed for optimal performance in modular firearm systems, ensuring compatibility and reliability across various configurations
16 inches barrel chambered for 5.56x45mm (.223 Cal) with a chrome-lined finish and a right hand twist rate of 1:7 inches

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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.

Magazines will be removed from firearms when shipping to states with magazine capacity restrictions.

California 10+ Round Magazine Buyers: PSA values your freedom and constitutional rights above all else. However, PSA will not accept new orders nor will ship any order until the Ninth Circuit Federal Court of Appeals mandate becomes finalized. Once this mandate is finalized, we will start accepting new orders and ship 10+ round magazines to California Customers.

WARNING: Handling firearms or firearms parts can expose you to lead and other petroleum products known to the State of California to cause cancer, birth defects, or other reproductive harm. Wash hands thoroughly after handling. For more information go to www.p65warnings.ca.gov (CA Health and Safety Code Section 25249.6).