CMMG RESOLUTE MK4/AR15 Complete Lower Receiver Mil-Spec Trigger Armor Black

Name: CMMG RESOLUTE MK4/AR15 Complete Lower Receiver Mil-Spec Trigger Armor Black
Brand: CMMG
SKU: 55CA3BE-AB
Price: 456.99 USD
Availability: InStock

All CMMG lower receivers

CMMG RESOLUTE Mk4/AR15 Complete Lower Receiver Mil-Spec Trigger Armor Black - Lower Receiver for AR-15 - view 1

CMMG RESOLUTE Mk4/AR15 Complete Lower Receiver Mil-Spec Trigger Armor Black - Lower Receiver for AR-15

Click to see full view

Buy Now

Plan where it ships

Firearms ship to a dealer (FFL), not your door. Pick one now to see your full cost.

CMMG

Overview

The CMMG RESOLUTE Mk4 Complete Lower Receiver is designed for the AR-15 platform, featuring a forged construction from 7075-T6 aluminum for enhanced durability and strength. This assembly includes a non-ambidextrous control layout and comes finished in a hardcoat anodized black, ensuring a rugged and corrosion-resistant surface. With a standard trigger pin size of .154, this lower is compatible with a wide range of aftermarket triggers, making it suitable for various builds, from tactical setups to precision rifles.

Specifications

MPN55CA3BE-AB

AssemblyComplete

ColorBlack

Trigger Pin.154

Material7075-T6 Aluminum

PlatformAR-15

ControlsNon-Ambi

FinishHardcoat Anodized

StyleForged

Visit the CMMG Store All CMMG lower receivers

CMMG RESOLUTE MK4/AR15 Complete Lower Receiver Mil-Spec Trigger Armor Black

Available Merchants(1)

Prices checked Oct 11, 2026

Price Alert

Get an email if the price drops 10% or more.

MidwayUSA

Free shipping

Shipping Speed

In Stock

$457

Buy Now

September 2026 on GunPartPicker

CMMG RESOLUTE MK4/AR15 Complete Lower Receiver Mil-Spec Trigger Armor Black ranked #248 of the 477 lower receivers builders added on GunPartPicker in September 2026. Builders on GunPartPicker first added it to a build in March 2026.

Today the one retailer we track has it in stock. Buying today, the lowest price is $456.99 at MidwayUSA.

Trending lower receivers →

Updated Oct 11, 2026 · from real builds on GunPartPicker · Prices checked Oct 11, 2026 · refreshed daily across 37 retailers