Geissele Automatics MK4 10" Federal Super Modular Rail M-LOK Gray
3 options
- Blackfrom $383.99, in stock
- Gray, this page
- OD Greenout of stock
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Geissele
Overview
The Geissele Automatics MK4 10" Federal Super Modular Rail in Gray is a lightweight aluminum handguard designed for AR-15 platforms, featuring an M-LOK mounting interface for easy attachment of accessories. With its 10-inch length, this handguard provides ample space for mounting optics, lights, and grips while maintaining a sleek profile that optimizes maneuverability. This handguard is commonly found in builds utilizing a rifle gas system with a 5.56 NATO caliber.
Specifications
Geissele Automatics MK4 10" Federal Super Modular Rail M-LOK Gray
3 options
- Blackfrom $383.99, in stock
- Gray, this page
- OD Greenout of stock
August 2026 on GunPartPicker
Geissele Automatics MK4 10" Federal Super Modular Rail M-LOK Gray ranked #86 of the 243 handguards builders added on GunPartPicker in August 2026. Builders have been adding it to their builds on GunPartPicker since February 2026. All time, it ranks #59 of the 677 handguards builders have added. Builds with this handguard are mostly chambered in 5.56 NATO (60%, then 300 Blackout 30%), mostly on pistol-length gas (63%, then rifle-length 38%), and mostly AR-15 (89%, then AR-9 11%).
Today the one retailer we track is out of stock. Listed prices start at $324.99 at Brownells for when it comes back.
Updated · from real builds on GunPartPicker · Prices checked · refreshed daily across 35 retailers
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Frequently Built With
The part most often added in each category by the 27 builds that include this one
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FN 20" CHF Government Rifle, 5.56x45mm 1:7 Rh Twist
Geissele Automatics AR-15 16 Super Duty Stripped Upper Receiver Ddc
Battle Arms Development Rack Ambidextrous AR-15 Charging Handle - Mod C
Geissele Automatics AR-15 SSA-E X Lightning Bow Trigger
LMT Piston Full Auto 5.56 AR-15 Bolt Carrier Group
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 2 →Builds in the community that include the Geissele Automatics Llc Mk4 10" Federal Super Modular Rail M-Lok Gray
| Build | Parts | Total |
|---|---|---|
 | 24 | $3272.66 |
 | 13 | $1204.80 |
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