$796.86
Availability: In Stock
Current Stock: Out of stock
Building a custom AR pistol or short-barrel rifle? The Colt AR-15 pistol upper receiver assembly in 5.56x45mm NATO gives you a proven platform without the unnecessary factory handguard. This 14.5" barreled upper comes stripped of rail furniture, letting you bolt on the free-float handguard of your choice—whether that's a lightweight tube, a modern M-LOK system, or anything in between. It's a straightforward approach: pay only for what you'll actually use, then customize to your needs.
The upper features a 1:7 twist button-rifled barrel with a standard 1/2"-28 threaded muzzle, paired with a low-profile gas block engineered to work under most contemporary handguards without fitment drama. That gas block clearance matters when you're running premium aftermarket rail systems. Everything you need to complete a functioning upper is in the box: the bolt-carrier group, charging handle, and barrel extension—no surprises, no missing parts.
Whether you're building a precision rifle, a compact combat platform, or a home-defense AR pistol, this Colt upper gives you a quality foundation with real-world compatibility. Colt's manufacturing heritage means the barrel extension and receiver fitment are tight and reliable. From there, the build is yours to customize.
| Caliber | 5.56x45mm NATO |
| Barrel Length | 14.5" |
| Barrel Rifling | Button rifled, 1:7 twist |
| Muzzle Thread | 1/2"-28 TPI |
| Gas Block | Low-profile, free-float compatible |
| Includes | Bolt-carrier group, charging handle |
| Handguard | None included |
The low-profile gas block is designed to clear most modern free-float handguards on the market. Any handguard with a standard AR-15 receiver extension will fit. Confirm your specific rail choice clears the gas block before purchase.
Yes. This upper assembly ships complete with the bolt-carrier group and charging handle, so you're ready to pair it with a lower receiver and start building.
The upper itself is caliber and mechanical neutral—it will work with any AR-15 compatible lower receiver. Your configuration (rifle vs. pistol) is determined by the lower and your final assembly. Always verify your build complies with local and federal firearms laws.
The 1/2"-28 threaded muzzle accepts any muzzle device compatible with that standard: suppressors, brakes, flash hiders, compensators, and more. Verify your device of choice is legal in your jurisdiction before installing.
SKU: 115686071 • Weight: 6.58oz
Availability: In Stock
Current Stock: Out of stock
Building a custom AR pistol or short-barrel rifle? The Colt AR-15 pistol upper receiver assembly in 5.56x45mm NATO gives you a proven platform without the unnecessary factory handguard. This 14.5" barreled upper comes stripped of rail furniture, letting you bolt on the free-float handguard of your choice—whether that's a lightweight tube, a modern M-LOK system, or anything in between. It's a straightforward approach: pay only for what you'll actually use, then customize to your needs.
The upper features a 1:7 twist button-rifled barrel with a standard 1/2"-28 threaded muzzle, paired with a low-profile gas block engineered to work under most contemporary handguards without fitment drama. That gas block clearance matters when you're running premium aftermarket rail systems. Everything you need to complete a functioning upper is in the box: the bolt-carrier group, charging handle, and barrel extension—no surprises, no missing parts.
Whether you're building a precision rifle, a compact combat platform, or a home-defense AR pistol, this Colt upper gives you a quality foundation with real-world compatibility. Colt's manufacturing heritage means the barrel extension and receiver fitment are tight and reliable. From there, the build is yours to customize.
| Caliber | 5.56x45mm NATO |
| Barrel Length | 14.5" |
| Barrel Rifling | Button rifled, 1:7 twist |
| Muzzle Thread | 1/2"-28 TPI |
| Gas Block | Low-profile, free-float compatible |
| Includes | Bolt-carrier group, charging handle |
| Handguard | None included |
The low-profile gas block is designed to clear most modern free-float handguards on the market. Any handguard with a standard AR-15 receiver extension will fit. Confirm your specific rail choice clears the gas block before purchase.
Yes. This upper assembly ships complete with the bolt-carrier group and charging handle, so you're ready to pair it with a lower receiver and start building.
The upper itself is caliber and mechanical neutral—it will work with any AR-15 compatible lower receiver. Your configuration (rifle vs. pistol) is determined by the lower and your final assembly. Always verify your build complies with local and federal firearms laws.
The 1/2"-28 threaded muzzle accepts any muzzle device compatible with that standard: suppressors, brakes, flash hiders, compensators, and more. Verify your device of choice is legal in your jurisdiction before installing.
SKU: 115686071 • Weight: 6.58oz
