LMT Defense Sale: Save 20% on MARS-H Rifles & Lowers at Boss Firearms

The MARS-H platform running through this sale is the same ambidextrous, monolithic-rail architecture LMT has supplied to U.S. Special Operations and NATO partner forces, and for a limited time you can pick it up at Boss Firearms for 20% off.

Use code LMT20 at checkout to take 20% off every item below. The code is valid on these six LMT Defense products only — complete rifles, one SBR, and two AR-10 lowers for anyone building their own. Here's what's in stock and what makes each one worth a look. While supplies last. This sale is running until September 30th, 2026. 

LMT MRGG-A 14.5" 6.5 Creedmoor SBR — MLK65145L-MARS-SR

Regular price: $4,680.00 → $3,744.00 with code LMT20 (save $936)

The MRGG-A is a factory reference build off the platform LMT developed for U.S. Special Operations Command, built around a monolithic 7075-T6 upper with quick-change barrel capability. The stainless barrel is cryogenically treated with LMT's proprietary coating and cut with a 1:8 twist for stable long-range 6.5 Creedmoor performance in a package short enough to run in tight spaces.

Highlights:

• 14.5" stainless barrel, 1:8 twist, cryo-treated
• Monolithic 7075-T6 upper with quick-change barrel system
• MARS-H ambidextrous lower with flared magwell
• AXLE two-stage trigger
• Full-auto-profile BCG with dual-ejector bolt
• Ships with one magazine and operator's manual

Shop the MRGG-A 14.5" 6.5 Creedmoor SBR →

Reminder: as an SBR, this item requires an approved NFA transfer through your dealer of record. Ask us about current wait times and the Texas suppressor/SBR law update before you order.

LMT MLKMWS 20" 6.5 Creedmoor MARS Rifle — MLK6520LA-MARS

Regular price: $4,347.00 → $3,477.60 with code LMT20 (save $869.40)

LMT's premier long-range precision rifle, and new for 2026 with a 15.3" M-LOK upper that now has an integrated ARCA rail built in — no separate mount needed for your bipod or tripod. The 20" chrome-moly barrel is cryo-treated and coated the same way as the MRGG-A above, so you're getting match-grade consistency without stepping outside the MARS-H family.

Highlights:

• 20" chrome-moly barrel, 1:8 twist, cryo-treated with proprietary coating
• 15.3" M-LOK upper with integrated ARCA rail (new for 2026)
• MARS-H ambidextrous lower and ambidextrous charging handle
• LMT EDM two-stage trigger
• LMT SOPMOD adjustable stock with QD endplate
• Ships with magazine, owner's manual, and 3 rail panels

Shop the MLKMWS 20" 6.5 Creedmoor MARS Rifle →

FFL transfer required; not available for sale in all states.

LMT MLKMWS 16" Light .308 MARS Rifle — MLKMWSLT16L-MARS

Regular price: $3,717.00 → $2,973.60 with code LMT20 (save $743.40)

If the 20" is built for distance, the 16" Light is built to move. Same monolithic MARS-H architecture and the same ambidextrous controls, but with a lightweight barrel profile that trims weight without giving up the rigidity that makes the platform accurate. This is the same rifle system NATO partners like the Estonian Defence Forces have put into service — proven, not just marketed.

Highlights:

• 16" lightweight chrome-lined barrel, 1:10 twist
• Monolithic Rail Platform (MRP) upper, 15.3" M-LOK handguard machined from one piece
• MARS-H ambidextrous lower and controls
• LMT EDM two-stage trigger, low-profile gas block
• LMT SOPMOD adjustable stock, winter trigger guard
• Ships with magazine, manual, and 3 rail panels

Shop the MLKMWS 16" Light .308 MARS Rifle →

FFL transfer required; not available for sale in all states.

LMT MARS-H 7.62x51 Battle Rifle, 13.5" Pinned — MLKMWSB-MARS

Regular price: $3,537.00 → $2,829.60 with code LMT20 (save $707.40)

LMT's flagship 7.62 NATO combat rifle, built for the shooters who need a .308 that runs reliably in any condition. The 13.5" barrel is pinned to keep overall length compliant, with a chrome-lined bore and cryo treatment for durability under hard use, feeding from 20-round magazines through a fully ambidextrous MARS-H lower.

Highlights:

• 13.5" pinned barrel, chrome-lined, cryo-treated, 1:10 twist
• MRP-H M-LOK monolithic upper with 19.25" Picatinny top rail
• Fully ambidextrous controls (charging handle, bolt catch/release, safety, mag catch)
• AXLE two-stage trigger
• Pinned 3-prong flash hider
• 20-round magazine capacity

Shop the MARS-H 7.62x51 Battle Rifle →

FFL transfer required; not currently available for sale in CA, CO, CT, DC, HI, IL, MA, NJ, NY, VT, or WA.

Building your own? Two MARS-H AR-10 lowers are on sale too

Not everyone wants a complete rifle off the shelf — some of you are building. Both of these lowers are covered by code LMT20 and are compatible with 7.62x51/.308 and 6.5 Creedmoor uppers.

LMT AR-10 Lower, MARS-H Complete — LM308AM

Regular price: $1,363.50 → $1,090.80 with code LMT20 (save $272.70)

A fully assembled MARS-H lower — trigger group, SOPMOD stock, and grip already installed — so all you need is an upper to finish the build. Ambidextrous selector, mag release, and bolt catch/release are machined directly into the 7075-T6 forging, not bolted on as an afterthought.

Shop the Complete MARS-H AR-10 Lower →

Note: LMT MWS/MARS-H lowers are compatible with LMT MWS/MARS-H uppers — mixing platforms with other manufacturers' components isn't guaranteed to fit or function.

LMT MARS-H Stripped AR-10 Lower — LM308AMSL

Regular price: $545.40 → $436.32 with code LMT20 (save $109.08)

For builders who want to spec their own trigger and furniture, this stripped lower ships with the ambidextrous components installed and nothing else — a clean canvas built on the same forging as the complete version above. Compatible with .260 Rem., 6.5 Creedmoor, and 7.62x51.

Shop the Stripped MARS-H AR-10 Lower →

Ready to buy?

All six of these are in stock now — just enter LMT20 at checkout for 20% off (valid on these LMT Defense items only). Every rifle also qualifies for financing through Credova and our military/first responder discount. Give us a call at 979-704-6269 or stop by our College Station showroom — our team can walk you through which MARS-H configuration fits how you actually shoot, and get your FFL transfer or NFA paperwork started the same day.

Discount applied via code LMT20 at checkout; valid on the six LMT Defense products listed above only, while supplies last. All rifles require an FFL transfer; the MRGG-A SBR additionally requires an approved NFA Form 4 before transfer.