CMMG

CMMG MK4/AR15 Stripped Lower Receiver Tungsten

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CMMG Mk4/AR15 Stripped Lower Receiver Tungsten - Lower Receiver for AR-15 - view 1
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Overview

The CMMG Mk4 Stripped Lower Receiver is designed as a foundation for your AR-15 build, offering a multi-caliber capability that allows for versatile performance depending on your selected upper. Finished in a tungsten Cerakote, this receiver not only provides a distinct aesthetic but also enhances durability and resistance to wear. This stripped lower is commonly utilized in a variety of custom builds, making it a flexible choice for builders looking to create a personalized firearm.

Specifications

MPN55CA102-TNG
AssemblyStripped
PlatformAR-15
ColorTungsten
FinishCerakote
CaliberMulti

Available Merchants(2)

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MidwayUSA
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In Stock
$132
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BattleHawk Armory
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$98
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September 2026 on GunPartPicker

CMMG MK4/AR15 Stripped Lower Receiver Tungsten ranked #128 of the 477 lower receivers builders added on GunPartPicker in September 2026. Builders have been adding it to their builds on GunPartPicker since March 2026. All time, it ranks #242 of the 1,036 lower receivers builders have added. Builds with this lower receiver are split between 300 Blackout (43%) and 5.56 NATO (43%), split between pistol-length (50%) and carbine-length (25%) gas systems, and nearly all AR-15.

It was hard to find in September 2026, in stock on only 1 of the 7 days we checked, and today only MidwayUSA has it in stock. The best price drifted down from $131.99 to $97.95 over September 2026 without a real sale. Buying today, the lowest price is $131.99 at MidwayUSA, above September's low of $97.95, so a better deal may come back.

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Frequently Built With

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

CMMG AR-15 Mil-Spec Trigger KIT

CMMG AR-15 Mil-Spec Trigger KIT

Trigger$29in 30% of them
Magpul MOE K2 Grip Polymer Gray

Magpul MOE K2 Grip Polymer Gray

Pistol Grip$15in 20% of them
CMMG MK4 .300BLK Banshee Upper Group Receiver 8in 1-7 Twist 5/8 X 24 TPI 16.5in Armor Black

CMMG MK4 .300BLK Banshee Upper Group Receiver 8in 1-7 Twist 5/8 X 24 TPI 16.5in Armor Black

Upper Receiver$790in 10% of them
Leapers UTG Ambidextrous 45/90 AR-15 Safety Selector - Black

Leapers UTG Ambidextrous 45/90 AR-15 Safety Selector - Black

Safety$25in 10% of them
CMMG AR15 Ambi Mag Catch, Black - 55AFF6E

CMMG AR15 Ambi Mag Catch, Black - 55AFF6E

Magazine Release$30in 30% of them
Strike Industries AR-15 Buffer Tube - 7-Position Advanced Receiver Extension - Blue

Strike Industries AR-15 Buffer Tube - 7-Position Advanced Receiver Extension - Blue

Buffer Tube$54in 10% of them

Build Configuration Breakdown

Aggregated and anonymized data showing how builders use this product

Caliber

42.9%
300 Blackout42.9%
5.56 NATO42.9%
.223 Wylde14.3%

Gas System

50%
Pistol50%
Carbine25%
Rifle25%

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