Product Description
Colt M4 CQB 10.3 Inch 5.56mm Barrel Assembly w/ Fixed Front Sight P/N: SP64049 UPC: 098289600240
Factory Colt M4 CQB profile barrel. 10.3 inch, 5.56x45mm NATO, carbine-length gas system. Complete assembly with M4 feed ramps, barrel nut, and fixed front sight tower with sight post. Muzzle is threaded 1/2-28 for your choice of muzzle device.
Same barrel family Colt uses on CQB / Commando-length uppers. Chrome-lined, 1:7 twist, government contour.
Features
- Factory Colt M4 CQB 10.3" barrel assembly
- 5.56x45mm NATO chamber
- Chrome-lined chrome-moly barrel
- 1:7 twist, six-groove rifling
- Government / M4 contour
- Carbine-length gas system
- M4 feed ramps and barrel extension
- Barrel nut included
- Fixed front sight tower with sight post
- Muzzle threaded 1/2-28
- Parkerized / matte black finish
Specs
- Manufacturer: Colt
- Part number: SP64049
- Caliber: 5.56 NATO / .223
- Length: 10.3"
- Twist: 1:7
- Gas system: Carbine
- Gas block journal: 0.750"
- Threads: 1/2-28
- Contour: Government
- Chrome lined: Yes
- Includes: Barrel, barrel nut, FSB / sight post
- Platform: M4 / AR-15
- Origin: USA
NFA notice
A barrel under 16" is restricted. Install only on a pistol, a registered SBR, or a registered machine gun. Do not put this barrel on a Title I rifle. Buyer is responsible for all federal, state, and local laws.
Muzzle device, gas tube, and upper receiver are sold separately.
Product Videos
Custom Field
Product Reviews
30 Reviews Hide Reviews Show Reviews
-
Colt 10.3" barrel
I bought this barrel for a CQBR build that I am acquiring parts for, so I have not shot it yet. I am very pleased with the quality of the barrel. It was packaged very well and shipping was fast. I will but more parts from AU.
-
quality product
outstanding value, colt quality, best price on the market by far. it makes me happy!!!
-
Colt M4 CQB Barrel
Excellent Oem Colt barrel in the wrapper. Original Colt quality and the best price on the internet by far!!
-
Non F-marked FSB
Bought this for a MK18 build but the front sight is NOT F-marked. It has codes I’ve NEVER seen on a fixed front sight. BUYER BEWARE. I’ll update my review IF I can get it to sight in with a flattop receiver. The makings on the left side are “AOK” and on the right side are an unknown circle forge ID possibly and “76” to the right of that. Can’t find anything about those marks anywhere.
-
Shipping was fast!
Really happy with the product came in blue back sealed, no damages, 100% colt product and shipping was fast!!
-
Great barrel
I picked this up on impulse to finish out a MK18 carbine. This is a great quality barrel. It came packaged very nicely and went together without issue. I took the carbine to the range and was pleasantly surprised with the accuracy. It was gassed nicely with and without a suppressor using an H2 buffer.
-
Colt 10.3 barrel
colt mk18 commando now, looks super cute!!!!
-
Mk18 block II FSP
Great price, great shipping speed and communication.
-
Colt Barrels, Master Race
If you’re into that sort of thing, get this pronto
