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CMMG
Overview
The CMMG AR-15 8.2" 300 Blackout MR Barrel is designed for those looking to maximize the performance of their compact builds. With a medium profile and a pistol-length gas system, this barrel offers a balance of stability and maneuverability, making it ideal for close-quarters applications. Its 1:7 twist rate helps stabilize a wide range of bullet weights for enhanced accuracy. This barrel is frequently found in builds specifically configured for the 300 Blackout caliber, catering to shooters who prioritize versatility and effectiveness in short-range engagements.
Based on build data
Aero Precision Gas Tube, Pistol Length - Stainless Steel
Sons of Liberty Gun Works Ar-15 Gas Tube Stainless Steel Pistol
Aero Precision Ar-15 Breach Charging Handle Ambidextrous Small Levers
Aero Precision Ar-15 5.56 Bcg W/c158 Bolt - Aero Logo - Phosphate
Aero Precision M4e1 Threaded Stripped Ar-15 Upper - No Forward Assist - Anodized Black
Timber Creek Outdoors Ambidextrous Safety Selector - Black
Aggregated and anonymized data showing how builders use this product
| Product | Category | Times Built Together |
|---|---|---|
| Aero Precision Gas Tube, Pistol Length - Stainless Steel | 4 | |
| Sons of Liberty Gun Works Ar-15 Gas Tube Stainless Steel Pistol | 3 | |
| Aero Precision Ar-15 Breach Charging Handle Ambidextrous Small Levers | 3 | |
| Aero Precision Ar-15 5.56 Bcg W/c158 Bolt - Aero Logo - Phosphate | 3 | |
| Aero Precision M4e1 Threaded Stripped Ar-15 Upper - No Forward Assist - Anodized Black | 3 | |
| Timber Creek Outdoors Ambidextrous Safety Selector - Black | 3 |
| Platform | Percentage |
|---|---|
| AR-15 | 100% |
| Caliber | Percentage |
|---|---|
| 300 Blackout | 100% |
| Gas System | Percentage |
|---|---|
| Pistol | 100% |
Builds in the community that include the Cmmg Ar15 8.2" 300blk Mr Barrel
| Build | Parts | Total |
|---|---|---|
 | 17 | $2052.92 |
 | 16 | $2837.01 |
| 7 | $920.88 |
 | 20 | $1874.64 |
 | 17 | $1506.56 |
1 global rating
CMMG 8.2 inch 300 BLK barrel cycles subsonic and supersonic 300 BLK from the same gas port. Chamber finish is clean. Standard 5/8x24 threading. Heats up quick as expected for short barrel suppressed shooting.
