▼ 19% below avg
CMMG MC 4140CM .300 AAC Blackout Barrel Black 8-inch
Lowest Price
$129.99
MSRP
$199.95
Savings
35% off
Verified In Stock at
12 Stores
Updated
Aug 26, 2026
Compare Deals from 16 Retailers
Verified availability, then price
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Code ARMSAGORA — 7% Off Most Items
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.750 Gas Journal
1:7 Twist
300 AAC Blackout Chamber
4140 Chrome Moly
8.0";Medium Taper Profile"
Pistol length gas port
Salt Bath Nitride Finish inside and out
Threaded 5/8-24
Specifications
Description
CMMG INC. SALT BATH NITRIDE BARREL SUB-ASSEMBLY 300 BLK a Pistol length gas port a Medium taper profile a Gas Block Journal: 0.750 a Threaded 4140 CrMo steel 8.0 barrel a Salt Bath Nitride (SBN) finished inside & out a Installed barrel extension a Properly headspaced
