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Geissele
Overview
The Geissele Automatics MK4 10.5" M-Lok Super Modular Rail in black is a lightweight aluminum handguard designed specifically for AR-15 platforms. With a 5-inch handguard length and M-LOK mounting interface, it allows for versatile accessory attachment while maintaining a slim profile for improved maneuverability. This handguard is frequently found on builds featuring a carbine gas system and chambered in 5.56 NATO, making it a solid choice for tactical setups and compact configurations.
Specifications
Geissele Automatics MK4 10.5" M-LOK Super Modular Rail Black
Available Merchants(8)
Prices checked
Price Alert
October 2026 on GunPartPicker
Geissele Automatics MK4 10.5" M-LOK Super Modular Rail Black ranked #25 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 #80 of the 885 handguards builders have added.
It was in stock most times we checked in October 2026, but today only Brownells has it in stock. Buying today, the lowest price is $325 at Brownells, 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
Expo Arms Combat Series 11.5" 5.56 NATO Chrome Lined AR-15 Barrel - Socom Profile - Carbine Length
Wilson Combat AR-15 Billet Upper Receiver
Cryptic Coatings 5.56 NATO AR-15 Bolt Carrier Group - Mystic Bronze
Aero Precision Stripped M4E1 AR-15 Lower Receiver - Special Edition - Freedom
Radian Weapons Talon Ambidextrous Safety Selector 2-Lever KIT - Radian Grey
Geissele Automatics .154" SSA Trigger
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 Geissele Automatics Llc Mk4 10.5" M-Lok Super Modular Rail Black
| Build | Parts | Total |
|---|---|---|
 | 21 | $2085.16 |
 | 26 | $3374.43 |
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