The Stern Defense 00645ACPBARREL105INCHD 45 ACP 10.50" Black Melonite 4150 Chrome Moly Steel Barrel is purpose-built for shooters assembling a dedicated .45 ACP AR-15 upper. This compact 10.5-inch barrel combines a durable 4150 chrome moly steel construction with a Black Melonite treatment, delivering a smooth bore, corrosion resistance, and consistent performance. The muzzle is threaded .578-28, giving you straightforward compatibility with common .45 ACP muzzle devices.
With its 1:16 twist rate optimized for standard .45 ACP projectiles, this barrel is well suited for range use, training, and general-purpose pistol-caliber builds where reliability and accuracy matter. The installed locating pin simplifies installation into your upper, helping ensure proper alignment and repeatable results. Stern Defense’s attention to detail and precise machining make this barrel a dependable foundation for your next .45 ACP AR project.
Key Features:
- Manufacturer: Stern Defense
- Model: 00645ACPBARREL105INCHD
- Caliber: .45 ACP
- Barrel Length: 10.50"
- Material: 4150 Chrome Moly Steel
- Finish Color: Black Melonite
- Twist Rate: 1:16
- Threaded Barrel: Yes, .578-28
| __Model | 006-45ACP BARREL10.5INCH-D1-M |
| __Caliber | .45 ACP |
| __Capacity | NA |
| __Optic Footprint | NA |
| __Action | NA |
| __Barrel Length | 10.50" |
