SIG Sauer M-LOK 15" M400 Tread Free Float Handguard, Black - HGRDTRDE15MLOKBLK
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Sig Sauer
Overview
The Sig Sauer M-LOK 15" M400 Tread Free Float Handguard is designed to enhance your AR-15's performance by providing a lightweight and rigid platform that doesn’t interfere with barrel harmonics. With its free-float construction, it allows for improved accuracy by preventing any contact with the barrel, while the 15-inch length offers ample space for accessories along the M-LOK mounting interface. This handguard is particularly favored in mid-length gas system builds chambered in 5.56 NATO, making it a solid choice for those looking to optimize their rifle setup.
Specifications
SIG Sauer M-LOK 15" M400 Tread Free Float Handguard, Black - HGRDTRDE15MLOKBLK
Available Merchants(7)
Prices checked
Price Alert
October 2026 on GunPartPicker
SIG Sauer M-LOK 15" M400 Tread Free Float Handguard, Black - HGRDTRDE15MLOKBLK ranked #54 of the 290 handguards builders added on GunPartPicker in October 2026. Builders have added it to their builds on GunPartPicker. Since April 2026, it ranks #262 of the 884 handguards builders have added.
Availability is good: it was in stock at one retailer or another nearly every time we checked in October 2026, and today 4 of the 7 retailers we track have it in stock. Prices barely moved in October 2026, holding around $112.84, with no real sale all month. Buying today, the lowest price is $112.84 at BattleHawk Armory, which matches the best price we saw in October.
Updated · from real builds on GunPartPicker · Prices checked · refreshed daily across 37 retailers
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Frequently Built With
The part most often added in each category by the builds that include this one
Anderson Manufacturing Closed Trigger AR15-A3 Lower Receiver AR15-A3-LWFORUM
Aero Precision AR-15 M4E1 Stripped Upper Receiver Black 5.56mm
FAXON Firearms 16" Gov't/socom 5.56 NATO Mid-Length 4150 QPQ
5.56 Bolt Carrier Group, No Logo - Phosphate
WMD Guns AR-15 Gas Tube Nitromet Mid-Length
Timney AR-15 Impact Trigger Flat Black 3lb
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.
CaliberBased on real build data showing which calibers builders choose alongside this product.
Gas SystemBased on real build data showing which gas system lengths builders use with this product.
Builds Featuring This Part
See all builds →Builds in the community that include the Sig Sauer M-LOK 15" M400 Tread Free Float Handguard, Black - HGRDTRDE15MLOKBLK
| Build | Parts | Total |
|---|---|---|
 | 16 | $1320.02 |
 | 20 | $1913.97 |
| 11 | $885.71 |
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