Geissele Automatics MK8 10.5" M-LOK Super Modular Rail Black

Geissele Automatics Llc Mk8 10.5" M-Lok Super Modular Rail Black - Handguard for AR-15 - view 1
Geissele Automatics Llc Mk8 10.5" M-Lok Super Modular Rail Black - Handguard for AR-15 - view 2
Geissele Automatics Llc Mk8 10.5" M-Lok Super Modular Rail Black - Handguard for AR-15 - view 3
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Geissele

Overview

The Geissele Automatics MK8 10.5" M-Lok Super Modular Rail is a robust handguard designed specifically for the AR-15 platform. With an overall handguard length of 11 inches, it provides ample space for mounting accessories via the M-LOK interface, enhancing the versatility of your build. Constructed from aluminum, this handguard is lightweight yet durable, making it ideal for a variety of builds, particularly those utilizing a carbine gas system chambered in 5.56 NATO.

Specifications

MPN05-1657B
PlatformAR-15
Mounting InterfaceM-LOK
ColorBlack
MaterialAluminum
Handguard Length10.5

Available Merchants(6)

Prices checked

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KY Gun Company logo
KY Gun Company
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In Stock
$275
BattleHawk Armory logo
BattleHawk Armory
Shipping varies
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In Stock
$306
Brownells logo
Brownells
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In Stock
$325
Palmetto State Armory logo
Palmetto State Armory
Free shipping
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In Stock
$326
Optics Planet logo
Optics Planet
Free shipping
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Out of Stock
$325
Primary Arms logo
Primary Arms
Free shipping
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Out of Stock
$325

August 2026 on GunPartPicker

Geissele Automatics MK8 10.5" M-LOK Super Modular Rail Black ranked #28 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 #62 of the 683 handguards builders have added. Builds with this handguard are mostly chambered in 5.56 NATO (71%, then .223 Wylde 29%), split between carbine-length (57%) and mid-length (29%) gas systems, and mostly AR-15 (78%, then AR-10 22%).

Availability is good: it was in stock at one retailer or another nearly every day in August 2026, and today 4 of the 6 retailers we track have it in stock. It dipped to $244.44 at Brownells for a stretch in August 2026, well under its usual $325, so sales do come around. Buying today, the lowest price is $274.62 at KY Gun Company, above August's low of $244.44, so a better deal may come back.

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Frequently Built With

The part most often added in each category by the 19 builds that include this one

Build Configuration Breakdown

Aggregated and anonymized data showing how builders use this product

Platform

77.8%
AR-1577.8%
AR-1022.2%

Caliber

71.4%
5.56 NATO71.4%
.223 Wylde28.6%

Gas System

57.1%
Carbine57.1%
Mid-Length28.6%
Pistol14.3%

Builds Featuring This Part

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Builds in the community that include the Geissele Automatics Llc Mk8 10.5" M-Lok Super Modular Rail Black

BuildPartsTotal
8" Sharps Bros carbine build
8" Sharps Bros carbine
15$1478.56
14.5" aero precision clone build
14.5" aero precision clone
11$957.18
first 5.56 build build
first 5.56 build
9$882.02

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