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CMMG
Overview
The CMMG MK4 .223 Remington AR Lower is a stripped lower receiver designed for the AR-15 platform, crafted from durable 7075-T6 aluminum and finished with a Cerakote in black. This lower is compatible with a multi-caliber setup, allowing builders to customize their firearms for various applications. It is a forged design, which adds strength and reliability, making it a solid choice for builds that typically feature a mid-length gas system and utilize the .223 Wylde caliber.
Based on build data

CMMG AR-15 HD Pivot and Takedown Pin Parts Kit - 55AFF3B

Bravo Company Mfg Upper Receiver Assembly w/ Laser T-Markings, Hard Coated Anodized - 4-UR-M4

Bravo Company M16 Bolt Carrier Group Black

Cmmg Ar-15 Bolt Catch

Wmd Guns Ar-15 Gas Tube Nitromet Mid-Length

Magpul Ar-15 Moe Stock Collapsible Mil-Spec Blk
Aggregated and anonymized data showing how builders use this product
| Product | Category | Times Built Together |
|---|---|---|
| CMMG AR-15 HD Pivot and Takedown Pin Parts Kit - 55AFF3B | 8 | |
| Bravo Company Mfg Upper Receiver Assembly w/ Laser T-Markings, Hard Coated Anodized - 4-UR-M4 | 4 | |
| Bravo Company M16 Bolt Carrier Group Black | 3 | |
| Cmmg Ar-15 Bolt Catch | 3 | |
| Wmd Guns Ar-15 Gas Tube Nitromet Mid-Length | 3 | |
| Magpul Ar-15 Moe Stock Collapsible Mil-Spec Blk | 3 |
| Platform | Percentage |
|---|---|
| AR-15 | 100% |
| Caliber | Percentage |
|---|---|
| 5.56 NATO | 66.7% |
| 9mm | 33.3% |
| Gas System | Percentage |
|---|---|
| Mid-Length | 50% |
| Blowback | 25% |
| Carbine | 25% |
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