16" 4150 Steel M4 Contour Barrel, .350 Legend, Carbine Length Gas System w/
Out of stock
Here at AR15Discounts.com we work with a wide variety of machine shops and barrel manufacturers. When we come across a barrel maker we like, we will often decide to private label those barrels for resale under the NBS brand. We purchase these barrels in large quantities and then pass the savings on to our customers.
Why buy an NBS Brand Barrel:
- American Made – Sourced from a variety of Tier 1 Manufacturers here in the United States
- Quality Control – All barrels are manufactured under ISO-9001 or better quality standards
- MOA Guarantee – All barrels 16 and longer are guaranteed to hold 1 MOA or better using properly weighted match grade factory ammo and shooting from a rest.
- Best Value for the Money
| Weight | 40 oz |
|---|---|
| Dimensions | 18 × 3 × 3 in |
| Finish | Nitride / Melonite |
| Barrel Profile | M4 |
| Gas System Length | Carbine |
| Gas Block Journal | 0.75 |
| Barrel Length (inches) | 16 |
| Barrel Chamber | 350 Legend |
| Platform | AR-15 |
| Twist Rate | 1-16 |
| Muzzle Thread Pattern | 5/8×24 |
| UPC | 4188 |
Compliance
NFA (National Firearms Act) compliance is crucial for legal ownership and transfer of regulated firearms and accessories like short-barreled rifles, suppressors, and certain types of ammunition, ensuring adherence to federal regulations to avoid legal penalties and ensure responsible firearm ownership.
Customer Reviews
- Reviews
- Questions
USNBS 16" 4150 Steel M4 Contour Barrel, 350 Legend, Carbine Length Gas System w/ 1:16 Twist Barrel
I purchased this barrel to see what the buzz was about with this new caliber for the AR platform rifle. After a couple of hundred rounds with factory and handloads, this barrel has exceeded my expectations! Best groups have been between 1" and 11/2" with the average about 2" making it a handy, hard-hitting hunting rifle for this upcoming season....I would like to see an 18" or 20" medium contour barrel in the future to get the full potential of this cartridge...
m4 350 16 inch barrel
very good but the gas block dimple is off by 2 to 3 deg. so if your going to use your a2 gi front sight you will have to recut the dimple to a slot to get a correct front sight alignment i added a second dimple for the bayonet mount set screw 10/32 x 1/2 inch and rear 10/32 x .250 inch the chamber cut is like the ks47 or ar47 feed ramp cuts very nice i polished my chamber all in all very nice. I just wished they would have left out the m4 barrel cut for the bipod its ok for 300aac or 7.62x39 but the .355 bore only leaves a .128 wall thickness without the cut it would be .197 instead of .128 that .069k more like my bca 20" ss .750 profile full rifle length gas system . all in all it works very good and every one say s/w makes a 350L no i do. oh i almost forgot its very accurate and super soft shooting 145 true 165 180 185 190 and 200gn custom reloads .
United States
m4 350 16 inch barrel
the fit was very good the bore was a little dirty i also polished it and the chamber with mother oxidations remover and a 45 cal mop brush no chambering issues but the gas block barrel dimple was off by 2 to 3 degrees i had to recut the right hand side so i could get true front sight alignment i used a micro cut off wheel and also redimpled the front bayonet holder and tapped it for 10/32 x 1/2 set screw and the rear set point with a 10/32 x .250 set screw this took about an additional 20 minutes because the factory dimple was off i decided to just fix it instead of sending it back . now if your not going to use your a2 m4 gi front sight a low gas block wont matter. all in all very happy with it i just would have not to have the m4 bipod cut in the barrel being at that point the barrel is only .128 thousands thick diameter wise with the .355 bore its find for the 7,62x39 or 300aac and .197 thousands i difference of .0345 thousands diameter wall thickness diameter more like my bca 20 ss rifle length gas system barrel. for 85.00s i can live with it all in all I'm very happy.
US
Barrel
It was out of stock and I'm waiting on it to be manufactured. They let me know and gave me options. Overall I can't complain or have any negative to state.
US350 Legend
It seems to be good so far.
