CMMG .223 Rem 12.5'' Multi-Role Barrel Sub-Assembly - 55DDF0A (UPC 815835016221)
Build the ultimate CQB AR with the CMMG 12.5'' .223 Remington Barrel Sub-Assembly Multi-Role – model 55DDF0A, UPC 815835016221. This complete drop-in unit features a nitride-treated barrel, integrated low-profile gas block, and pin/weld muzzle device for NFA compliance or pistol builds. CMMG's battle-proven design for suppressed or unsuppressed dominance.
Top-Tier Features of the CMMG Multi-Role Barrel
- 12.5'' 4150 CMV Barrel: Multi-role profile balances weight, velocity, and maneuverability.
- QPQ Nitride Finish: Melonite treatment for corrosion resistance and 20,000+ round life.
- Integrated Gas Block: Low-profile, dimpled for rock-solid set screws.
- M4 Feed Ramp Extension: Reliable feeding with any mag.
- 1:7 Twist Rate: Stabilizes 55-77gr bullets perfectly.
- Pre-Pinned Muzzle Device: A2 flash hider or brake – legal 16'' OAL without stamp.
- Complete Sub-Assembly: Barrel, gas tube, block, pin – ready for your upper.
Powerhouse Performance for AR Builders
12.5'' barrels excel in home defense and duty – CMMG tunes it for flawless function. "Runs suppressed like a dream – zero tuning needed!" lauds a PDW user. Accuracy under 1.5 MOA with quality ammo.
Essential for CMMG 12.5 AR barrel, .223 multi-role sub assembly, 55DDF0A barrel, and pinned AR15 barrel. UPC 815835016221 – CMMG reliability.
Complete Specifications
| Specification | Details |
|---|
| Model Number | 55DDF0A |
| UPC | 815835016221 |
| Caliber | .223 Remington / 5.56 NATO |
| Barrel Length | 12.5 inches |
| Twist Rate | 1:7 |
| Material/Finish | 4150 CMV QPQ Nitride |
| Gas System | Carbine-Length |
| Includes | Gas Block, Tube, Pinned Muzzle Device |
Builder Buzz
"Drop-in perfection for my 12.5 SBR – eats everything!" – NFA Nate, VA
"CMMG quality shines. Accurate and reliable." – Duty Dave, TX
Assemble Your CQB King
The CMMG 55DDF0A 12.5'' Barrel Sub-Assembly is ready for action. Complete your upper – supreme maneuverability awaits!
Build better with CMMG!
The End
