CHF Chrome Lined Switchblock® Barrel 5.56

Please allow 3-4 business days for shipment-these barrels are built to order. If an expedited shipping method is chosen, your order will ship next business day after it is completed. All expedited orders with this barrel will be held and shipped together.

5.56mm Lo-Pro Gas Block Barrel with Switchblock®

CHF Chrome Lined Barrel -556

--1 in 7" twist 

--Extended feed ramps 
--Manganese Phosphate finish 

--Pinned Switchblock
--1/2x28 threads 
--Light Contour

 To allow access to the Switchblock®, it cannot be covered up by a handguard. The longest handguard that can be used with a carbine gas system is 7" and a 9" for the mid-length, intermediate, and rifle length.

Gas System Weight
10.5" LSLP Carbine 25 oz.
12.5" LGPRLP Carbine 26.5 oz.
14.5" LCLP Mid 30 oz.
16" LRLP Mid 32 oz. 


Our chrome lined barrels are cold hammered forged and made with the material callouts and manufacturing process for the M249 Machine Gun barrel.

The cold hammer forging process work hardens the steel around a rifled mandrel, which creates the lands and grooves. The barrel is then chrome lined to the spec for a M249 Machine Gun barrel, which is about twice as thick as that of an M4 barrel. The end result is a rifle that can be run hard day after day. For any high round count, high temperature, heavy shooting, we recommend our chrome lined barrel.

All NFA Regulations apply. Please check your local and state laws before ordering. 
Contact your local ATF Field Office with any NFA questions you may have.


You can add a headspaced bolt to your barrel for $65, click here


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