J
Jando_pdwminor gripes
Reviewed on April 17, 2026Verified with Build
works as expected. price is a little steep
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Lmt Mars-L Ambidextrous Ar-15 Stripped Lower Receiver
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Lewis Machine & Tool
Overview
The LMT Mars-L Ambidextrous AR-15 Stripped Lower Receiver is designed for builders looking to create a versatile platform, featuring ambidextrous controls that facilitate operation for both right and left-handed users. This stripped lower is compatible with standard AR-15 components and has a trigger pin diameter of .154, ensuring compatibility with a wide range of trigger assemblies. Builders often integrate this receiver into mid-length gas system builds chambered in 5.56 NATO, making it a solid choice for those aiming for a balance of accuracy and reliability.
Specifications
MPNM7SL
ControlsAmbidextrous
Trigger Pin.154
FinishHardcoat Anodized
AssemblyStripped
PlatformAR-15
Frequently Built With
Based on build data
Geissele Automatics Llc Ar-15 Ssa-E X Lightning Bow Trigger
B5 Systems Trigger Guard ATG-001-01
Strike Industries Ambidextrous Magazine Release, Black - ARAMBIMRBK
Fortis Lightweight Enhanced AR-15 End Plate, Gold - LE-BLK-K1-GOLD
Strike Industries Flat Wire Spring for AR Carbine - AR-FWS-C
CMMG AR-15 HD Pivot and Takedown Pin Parts Kit - 55AFF3B
Build Configuration Breakdown
Aggregated and anonymized data showing how builders use this product
PlatformBased on real build data showing which platform (AR-15, AR-10, AR-9) builders pair with this product.
100%
AR-15100%
CaliberBased on real build data showing which calibers builders choose alongside this product.
83.3%
5.56 NATO83.3%
.223 Wylde16.7%
Gas SystemBased on real build data showing which gas system lengths builders use with this product.
54.5%
Carbine54.5%
Mid-Length45.5%
| Product | Category | Times Built Together |
|---|---|---|
| Geissele Automatics Llc Ar-15 Ssa-E X Lightning Bow Trigger | 85 | |
| B5 Systems Trigger Guard ATG-001-01 | 53 | |
| Strike Industries Ambidextrous Magazine Release, Black - ARAMBIMRBK | 46 | |
| Fortis Lightweight Enhanced AR-15 End Plate, Gold - LE-BLK-K1-GOLD | 40 | |
| Strike Industries Flat Wire Spring for AR Carbine - AR-FWS-C | 40 | |
| CMMG AR-15 HD Pivot and Takedown Pin Parts Kit - 55AFF3B | 39 |
| Platform | Percentage |
|---|---|
| AR-15 | 100% |
| Caliber | Percentage |
|---|---|
| 5.56 NATO | 83.3% |
| .223 Wylde | 16.7% |
| Gas System | Percentage |
|---|---|
| Carbine | 54.5% |
| Mid-Length | 45.5% |
Builds Featuring This Part
See all 24 →Builds in the community that include the Lmt Mars-L Ambidextrous Ar-15 Stripped Lower Receiver
| Build | Parts | Total |
|---|---|---|
 | 16 | $1694.70 |
 | 21 | $2939.93 |
 | 27 | $2104.50 |
 | 28 | $2587.62 |
 | 21 | $3525.44 |
| 12 | $3732.08 |
 | 25 | $3618.69 |
 | 22 | $5853.17 |
 | 8 | $1508.14 |
 | 24 | $6372.24 |
 | 12 | $2293.64 |
| 22 | $1994.45 |
Customer reviews
4.3out of 5
3 global ratings
Top reviews
Z
ZaccaiahLMT MARS-L tight fit
Reviewed on March 27, 2026Verified with Build
LMT MARS-L ambi stripped lower mates with any quality upper with zero detectable play at the takedown pin lugs. Ambi controls cut into the receiver. Black anodize is consistent. Premium lower that lives up to the LMT reputation.
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P
PatchMe556LMT MARS-L anodize batch
Reviewed on January 31, 2026Verified with Build
LMT MARS-L ambi lower quality is excellent. Mate to any quality upper has zero play. The black anodize varies slightly between production batches - mine matches a recent run but a side by side with an older LMT lower shows tone differences.
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