Threading.308 Engraving

308 AR10740 drop-in 20″ Fluted



The shorter barrel in the image is our AR10740 contour, very similar to our .223 AR740 contour in our .223 barrels. Gas block size is .750″. The diameter in front of the barrel extension is 1.200″ and then the profile drops down to .750″ and then up to a shoulder for the .750″ diameter gas block section and then down to .740″ to the muzzle. Muzzle threads are 5/8 – 24.

This profile is offered in two lengths; 18″ and 20″.

20″ Specifications:

The fluted weight is 2.34 pounds in .308 Winchester. To see a .pdf drawing file of this profile – Click Here


In stock

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Product Description

We are offering an AR type barrel chambered for the  .308 Winchester cartridges. These are available in four styles and all are completely finished drop-in type barrels. They are finish-chambered and have a DPMS-style barrel extension installed and the gas port hole drilled for a rifle-length gas system. They also are threaded 5/8″ – 24 at the muzzle. These barrels are not compatible with the Armalite or Rock River Arms rifles.


All versions of this stainless steel AR-type barrel are chambered with a PTG semi-auto match reamer. They are rifled with an 11″ twist 3-groove configuration in .308 Winchester and an 8″ twist 3-groove in .260 Remington. These barrels are also hand-lapped to our internal finish standards. The section forward of the gas block section is engraved: “Lilja AR .308 Win. 11T”. The barrel extensions are a DPMS type and these barrels will headspace properly with DPMS type bolts. The gas block and gas port hole are positioned for standard rifle length gas tubes.

Additional Information

Weight 4 lbs
Dimensions 24 x 1.5 x 1.5 in