https://midstatefirearms.com/product/13-9-5-56-223-gov-profile-midlength-ar-15-barrel-ba-modern-series/

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DETAILS

Buy The Ballistic Advantage 5.56 chambered 13.9 inch Government Profile Mid-Length Modern Series Barrel. It is machined from 4150 Chrome Moly Vanadium steel with a QPQ Corrosion Resistant Finish and QPQ coated M4 feed ramp extension.

SKU BABL556035M
Length 13.9″
Material 4150 Chrome Moly Vanadium
Profile Government
Finish QPQ Corrosion Resistant
Twist Rate 1:7 inches
Gas System Length Mid-Length
Gas Block Journal .750″
Muzzle 1/2×28 Threaded
Weight 26oz