Z
zNathanGzhappy with it
Reviewed on March 24, 2026Verified with Build
free float feel with no contact on the barrel. great length for my build
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Bravo Company Mfg M-LOK 13" Modular Rail, Black - MCMR13556BLK
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Bravo Company
Overview
The Bravo Company Mfg M-LOK 13" Modular Rail is a free-float handguard designed for the AR-15 platform, providing a stable mounting interface for accessories without adding unnecessary weight. The M-LOK mounting system allows for versatile attachment options, making it easy to customize your setup. This rail is typically found on builds featuring a mid-length gas system and chambered in 5.56 NATO, making it a popular choice for those looking to enhance their rifle's performance and modularity.
Specifications
MPNMCMR13556BLK
PlatformAR-15
ColorBlack
Handguard Length13
Mounting InterfaceM-LOK
Construction TypeFree-Float
FinishHardcoat Anodized
August 2026 on GunPartPicker
Bravo Company Mfg M-LOK 13" Modular Rail, Black - MCMR13556BLK was the fourth most added handguard on GunPartPicker in August 2026, behind the Forward Controls Design AR-15 Handguard 13.7in. M-LOK Black, with about 4% of all handguards added to builds. Up from #6 in July. Builds with this handguard are nearly all chambered in 5.56 NATO, mostly on mid-length gas (78%, then carbine-length 22%), and nearly all AR-15.
Availability is good: it was in stock at one retailer or another nearly every day in August 2026, and today both retailers we track have it in stock. Prices barely moved in August 2026, holding around $224.99, so there haven't been real sales lately. Buying today, the lowest price is $224.95 at Classic Firearms, which matches the best price we saw in August.
Updated · from real builds on GunPartPicker · Prices checked · refreshed daily across 31 retailers
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Frequently Built With
The part most often added in each category by the 81 builds that include this one
Daniel Defense 14.5" 5.56 NATO CHF Mid-Length 1:7 Government Contour AR-15 Barrel With Gas Block
Barrel$420in 8 builds
Bravo Company Mfg Upper Receiver Assembly w/ Laser T-Markings, Hard Coated Anodized - 4-UR-M4
Upper Receiver$129 · out of stockin 31 builds
Aero Precision AR-15 Breach Charging Handle Ambidextrous Small Levers
Charging Handle$69 · out of stockin 10 builds
Aero Precision Stripped M4E1 AR-15 Lower Receiver - Special Edition - Freedom
Lower Receiver$155 · out of stockin 9 builds
Bravo Company M16 Bolt Carrier Group Black
Bolt Carrier Group$199in 25 builds
Geissele Automatics AR-15 SSA-E X Lightning Bow Trigger
Trigger$335in 9 builds
Build Configuration Breakdown
Aggregated and anonymized data showing how builders use this product
Gas SystemBased on real build data showing which gas system lengths builders use with this product.
77.8%
Mid-Length77.8%
Carbine22.2%
Builds Featuring This Part
See all 17 →Builds in the community that include the Bravo Company Mfg M-LOK 13" Modular Rail, Black - MCMR13556BLK
| Build | Parts | Total |
|---|---|---|
 | 10 | $1470.00 |
 | 13 | $1787.05 |
 | 12 | $2123.85 |
| 15 | $2594.66 |
 | 6 | $1615.39 |
 | 23 | $2328.44 |
| 25 | $2091.49 |
 | 20 | $1876.54 |
| 26 | $3853.00 |
 | 18 | $1161.33 |
 | 16 | $1908.20 |
 | 11 | $1197.71 |
Customer reviews
5.0out of 5
2 global ratings
Top reviews
J
jakedogg44887MCMR 13 M-LOK solid
Reviewed on March 15, 2026Verified with Build
BCM MCMR 13 inch M-LOK rail has tight tolerance M-LOK slots and the anti-rotation tabs sit flush against the upper. Free float aluminum body. Black anodize is consistent. BCMs barrel nut wrench makes install straightforward.
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