The LMT MARS-H 7.62 DMR-ARCA | 18″ Rifle is a semi-automatic precision rifle chambered in 7.62 NATO (.308 Winchester) and designed for long-range shooting, designated marksman applications, and precision rifle competition. Built around LMT’s patented Monolithic Rail Platform (MRP®), the rifle features a one-piece aerospace aluminum upper receiver with a quick-change barrel system that allows compatible barrels to be swapped while maintaining repeatable alignment. The 15.3-inch MRP-H M-LOK® upper incorporates an integrated ARCA rail for tripod and bipod compatibility, a full-length Picatinny top rail, and M-LOK attachment points for accessories.

The rifle is equipped with an 18-inch stainless steel barrel featuring a 1:8 right-hand twist, cryogenic treatment, and a proprietary protective coating for long-term durability. The MARS-H ambidextrous lower receiver includes an AXLE Precision two-stage trigger, adjustable DMR stock, ambidextrous controls, ergonomic grip, and winter trigger guard. The rifle ships complete with one 20-round magazine, owner’s manual, and three rail panels.

Specifications

• Caliber: 7.62 NATO (.308 Winchester)
• Barrel Length: 18 in (457 mm)
• Barrel Material: Stainless Steel
• Barrel Twist Rate: 1:8 RH
• Operating System: Direct Impingement
• Upper Receiver: MRP-H 15.3″ Monolithic M-LOK® with Integrated ARCA Rail
• Rail System: M-LOK® with Full-Length Picatinny Top Rail
• Lower Receiver: MARS-H Ambidextrous
• Trigger: AXLE Precision Two-Stage
• Stock: Adjustable DMR Stock
• Charging Handle: Ambidextrous
• Bolt Carrier Group: Semi-Auto
• Magazine Capacity: 20 Rounds
• Gas System: Low-Profile Gas Block with Straight Gas Tube

Included in the Box

• LMT MARS-H 7.62 DMR-ARCA Rifle
• 20-Round Magazine
• Owner’s Manual
• Three Rail Panels

Features

• Patented Monolithic Rail Platform (MRP®) upper receiver
• Quick-change barrel system with return-to-zero capability
• Integrated ARCA rail for tripod and support compatibility
• M-LOK® handguard with full-length Picatinny top rail
• Cryogenically treated stainless steel barrel
• Proprietary barrel coating for enhanced durability
• Fully ambidextrous controls
• AXLE Precision two-stage trigger
• Adjustable DMR stock with comb height and length-of-pull adjustment
• Made in the USA

At a glance