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CMMG 300 AAC Blackout 16.1″ Barrel – Carbine Length 1:7 Twist – 4140 CrMo Salt Bath Nitride
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We have a 90-day no-hassle return policy. We pay return shipping.
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After 90 days, defective items will still be covered under the manufacturer’s warranty, where applicable.
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Shipping cost is $7.99 for orders under $50. We ship with UPS or USPS, depending on the item.
Most orders received by 1pm CST ship the same day
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Perfect for building your custom AR15 upper group. Comes with properly installed M4 barrel extension. All barrel sub-assemblies are properly headspaced.
- Multi Role Profile
- 4140 Chrome Moly
- Salt Bath Nitride Finish inside and out
- 1:7 Twist
- 300 AAC Blackout Chamber
- Threaded 5/8-24
- Carbine length gas port
- .750? Gas Journal
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Barrel works as advertised. Not a $300 barrel, so it probably won't last through 100k rounds, but it's exactly what I needed. The biggest reason for 5 stars is just AT3 Tactical, hands down the best customer service I've come across building AR's from the internet. Had a problem with a defective product, let them know, received a response within 3 hours, they sent out a new one, and a return box for the defective one. You can buy from these guys with all confidence that you'll be satisfied or they'll make it right. The pic is sighting in with AT3's 2 MOA Red Dot firing 3 round groups, and checking placement. 75 yds with 1X optics, I'm more than satisfied with everything AT3 Tactical.