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SIONICS Barrels are manufactured from CMV 4150 Ordnance Steel. All Barrels are Radiograph and MPI tested.
11595E CMV 4150 Steel
M4 Barrel Extension
5.56mm NATO Chamber
1/7 Twist Rate
.750 Low Profile Gas Block
SIONICS Designed Medium Contour
Chrome-Lined Bore and Chamber, Maganese Phospate outer finish
Standard 1/2X28 Muzzle Threading
Carbine Length Gas System
X-Rayed and MP Inspected
Note: This is a stripped Barrel and includes the gas block. All Barrels are pre-dimpled for low profile gas block usage.