LMT Defense MARS-LS AR Pistol 5.56 NATO with HK MR-Series Piston Upper, 11 in Barrel, Geissele Trigger, SB Tactical Brace
This custom AR pistol pairs an LMT MARS-LS ambidextrous lower with a Heckler & Koch MR-series short-stroke piston upper for a robust, feature-rich build. It adds an upgraded Geissele trigger and Super Safety FRT, an approximately 11-inch threaded barrel with a 3-prong flash hider, and an SB Tactical adjustable pistol stabilizing brace. The handguard is an M-LOK free-float design with an integral QD sling socket and a Picatinny top rail, while the bolt carrier is marked "HK MR."
Condition
Overall Condition: Good condition, showing some signs of prior use and handling.
Bore Overall Condition: Excellent - Clean, mirror finish, no signs of wear.
Bore Rifling: Excellent Rifling - Sharp lands and grooves.
Specific Condition Notes: There are visible handling marks from previous use. Please refer to the photos for a closer look.
What's Included
- 1x 30-round Magpul PMAG (windowed) polymer magazine for 5.56x45
The HK MR-series upper uses a short-stroke piston system with an external two-position gas regulator, offering a clean-running action. The bolt carrier is marked "HK MR," and the free-float handguard provides M-LOK mounting along with an integral QD sling socket. A Picatinny top rail runs along the top.
The LMT MARS-LS lower delivers true ambidexterity with a right-side bolt catch/release, ambidextrous safety selector, and ambidextrous magazine controls. The receiver set is aluminum with a hard-coat anodized finish, and the lower is marked MULTI-CAL.
The barrel is approximately 11 inches, threaded at the muzzle, and fitted with an open-tine 3-prong flash hider. The free-float handguard helps maintain accuracy while keeping weight forward of the receiver.
Controls and furniture are set up for practical use with an upgraded Geissele trigger and Super Safety FRT, a polymer AR-15 pistol grip, and a carbine receiver extension wearing an SB Tactical adjustable pistol stabilizing brace with a hook-and-loop strap. Capacity is 30+1 with the included magazine.