Geissele

Geissele Automatics MK4 10" Federal Super Modular Rail M-LOK Gray

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Geissele Automatics Llc Mk4 10" Federal Super Modular Rail M-Lok Gray - Handguard for AR-15 - view 1
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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

MPN05-430G
PlatformAR-15
ColorGray
Handguard Length10
MaterialAluminum
Mounting InterfaceM-LOK

Available Merchants(1)

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$324.99
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Build history on GunPartPicker

Builders have added the Geissele Automatics MK4 10" Federal Super Modular Rail M-LOK Gray to their builds on GunPartPicker. Since April 2026, it ranks #80 of the 880 handguards builders have added. Builds with this handguard are split between 5.56 NATO (52%) and 300 Blackout (19%), split between rifle-length (44%) and pistol-length (38%) gas systems, and mostly AR-15 (90%, then AR-9 10%).

Today the one retailer we track is out of stock. Listed prices start at $324.99 at Brownells for when it comes back.

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Frequently Built With

The part most often added in each category by the builds that include this one

Foxtrot Mike Products Complete FM9 Premium 9mm AR-15 Lower Receiver

Foxtrot Mike Products Complete FM9 Premium 9mm AR-15 Lower Receiver

Lower Receiver$275 · out of stockin 7% of them
FN 20" CHF Government Rifle, 5.56x45mm 1:7 Rh Twist

FN 20" CHF Government Rifle, 5.56x45mm 1:7 Rh Twist

Barrel$322 · out of stockin 15% of them
Geissele Automatics AR-15 16 Super Duty Stripped Upper Receiver Ddc

Geissele Automatics AR-15 16 Super Duty Stripped Upper Receiver Ddc

Upper Receiver$1,150in 19% of them
Battle Arms Development Rack Ambidextrous AR-15 Charging Handle - Mod C

Battle Arms Development Rack Ambidextrous AR-15 Charging Handle - Mod C

Charging Handle$80in 15% of them
Geissele Automatics AR-15 SSA-E X Lightning Bow Trigger

Geissele Automatics AR-15 SSA-E X Lightning Bow Trigger

Trigger$335in 11% of them
LMT Piston Full Auto 5.56 AR-15 Bolt Carrier Group

LMT Piston Full Auto 5.56 AR-15 Bolt Carrier Group

Bolt Carrier Groupin 7% of them

Build Configuration Breakdown

Aggregated and anonymized data showing how builders use this product

Platform

90%
AR-1590%
AR-910%

Caliber

52.4%
5.56 NATO52.4%
300 Blackout19%
.223 Wylde9.5%
.308 Win4.8%
.50 Beowulf4.8%
Other9.6%

Gas System

43.8%
Rifle43.8%
Pistol37.5%
Carbine18.8%

Builds Featuring This Part

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Builds in the community that include the Geissele Automatics Llc Mk4 10" Federal Super Modular Rail M-Lok Gray

BuildPartsTotal
for plinking 16" build
for plinking 16"		24$3261.06
SBR 8.2" 5.56 build
SBR 8.2" 5.56		13$913.27

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