LMT MARS-H
The LMT MARS-H (Modular Ambidextrous Rifle System — Heavy) is LMT's flagship 7.62×51mm NATO battle rifle. The MARS-H is built around LMT's patented Monolithic Rail Platform (MRP™) upper — milled from a single solid piece of aerospace aluminum forging — paired with the fully ambidextrous MARS-H lower receiver. The MRP™ engages the barrel extension 360° for superior lockup, and the barrel is user-removable in seconds via two locking bolts, returning to zero when reinstalled. One upper can accept multiple barrel lengths, materials, and calibers. Available in a standard 16" configuration (MLKMWS-MARS) and a 13.5" battle rifle configuration with pinned LMT 3-prong flash hider (MLKMWSB-MARS).
Specifications
Caliber | 7.62×51mm NATO (.308 Win) |
Barrel (Standard) | 16" chrome-lined, 1:10 RH twist, low-profile gas block, proprietary coating, cryogenically treated |
Barrel (Battle Rifle) | 13.5" chrome-lined, 1:10 RH twist, pinned LMT 3-prong flash hider |
Upper Receiver | MRP™ Monolithic Rail Platform — single aerospace aluminum forging; 19.25" uninterrupted Picatinny top rail; 7-sided M-LOK handguard |
Lower Receiver | MARS ambidextrous lower — ambi bolt catch, mag catch, and safety selector |
Trigger | EDM two-stage trigger |
Stock | LMT SOPMOD collapsible stock on mil-spec buffer tube |
Grip | LMT ergonomic textured grip |
Other Controls | Winter trigger guard; QD sling endplate |
Magazine | 20-round 7.62×51mm detachable box magazine |
SKU — Standard (16") | MLKMWS-MARS |
SKU — Battle Rifle (13.5") | MLKMWSB-MARS |
Key Features
Patented MRP™ upper: the only truly monolithic rail platform, milled from a single aerospace aluminum forging — no separate handguard tube or barrel nut required
360° barrel extension engagement: two locking bolts (accessible from the receiver side) secure the barrel with a full 360° interface, enabling rapid field swaps with return to zero
19.25" uninterrupted Picatinny top rail with 7-sided M-LOK attachment on remaining faces
MARS fully ambidextrous lower: all primary controls operable from either side without repositioning the firing hand
Chrome-lined, cryogenically treated, proprietary-coated barrels for long-term durability
Available in 16" standard and 13.5" battle rifle (pinned flash hider) configurations
Made in Milan, Illinois, USA
Manufacturer Contact
For additional information, visit lmtdefense.com.