M4_navy.308 ar10740 threading.223 Engraving

.223-8 M4 Threaded

$490.00

These barrels are a true match-grade barrel, we only have one grade for all of our barrels, our best. All of these barrels are made from 1″ diameter 416 alloy rifle-barrel-quality stainless steel. Every barrel is drilled, reamed and rifled in our shop followed by a stress relieving heat treatment operation. They are then hand- lapped for a superior internal finish and diameter uniformity.

M4: .975″ diameter for 2″ then a radius down to .850″ diameter to the .750″ diameter gas block section. From the gas block to the muzzle the diameter is .725″. Barrel length is 17″ including the M4-type barrel extension and the M4 barrels are furnished with a .500″ x 28 TPI x .600″ long threaded muzzle. The gas system is carbine-length. This barrel profile is an exact copy of the Recon barrel we’ve made for the US Navy SEALS. Weight is 2.18 pounds. Engraved: Lilja M4 .223 8T”. To see a .pdf drawing of the profile – Click Here

We also offer a fluted version of the M4 in .223. The contour is the same as the M4 described above and like our other fluted AR type barrels there is a fluted section in front of and behind the gas block area except where the barrel is engraved. The fluted weight is 2.0 pounds.

In stock

Categories: , , ,

Product Description

The .223 version is chambered with a Wylde-type chamber. These barrels are threaded for and furnished with a pinned barrel extension with proper head space and the gas port hole drilled and an 11º target crown. We are milling a narrow flat on the bottom side of the gas port section for set screws used with some types of gas blocks. This prevents marring of the .750″ or .936″ diameter by the set screws and helps align the gas block with the gas port hole.

This image shows the three AR-type contours that we are keeping in-stock as a drop-in type barrel (muzzle threading is standard but not shown in image). The top contour is our AR24 contour, the middle one is our AR740 with the Wasp weight reduction section turned on the .975" diameter. The bottom contour is the carbine length gas system M-4.
This image shows the three AR-type contours that we are keeping in-stock as a drop-in type barrel (muzzle threading is standard but not shown in image). The top contour is our AR24 contour, the middle one is our AR740 with the Wasp weight reduction section turned on the .975″ diameter. The bottom contour is the carbine length gas system M-4.

All current production drop-in barrels use an M4 style barrel extension.

The front section of the barrel is engraved with “Lilja AR .223 8T”. Just add your gas block and tube and drop into your upper receiver.

Additional Information

Weight 4 lbs
Dimensions 24 x 1.5 x 1.5 in