Description
DSI 14.5" 5.56 NATO AR-15 Barrel – MTOP / Medium Taper
The DSI 14.5" 5.56 NATO MTOP Barrel is manufactured in-house for AR-15 builds and upgrades that benefit from a medium-taper barrel profile. Machined from 4150 chrome moly vanadium steel, it combines a 1:7 twist with a mid-length gas system and M4 feed ramps.
The medium-taper profile provides a balance between barrel rigidity and overall weight, while the mid-length gas system offers a longer operating system than a traditional carbine-length 16-inch configuration. The barrel also features a .750-inch gas block journal, 1/2-28 threaded muzzle, and durable nitride finish.
Proudly made in the USA.
Technical Specifications
| Caliber | 5.56 NATO |
| Barrel Length | 14.5 inches |
| Profile | MTOP / Medium Taper |
| Material | 4150 CMV Steel Mil-B-11595 |
| Twist Rate | 1:7 |
| Gas System | Mid-length |
| Gas Block Journal | .750 inch |
| Feed Ramps | M4 style |
| Muzzle Thread | 1/2-28 |
| Finish | Nitride |
Specifications subject to change without notice.