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AR Barrels: .204 Ruger, .223, and 6.5 Grendel, .300 Blackout Chamberings

We offer a threaded and finish chambered AR-15 type drop-in barrel. These barrels are available in .204 Ruger, .223 and 6.5 Grendel chamberings. They are made from our 416 type stainless steel and rifled with our Special Forces-proven 8" twist in .223 and a 12" twist in .204 Ruger, and the 8" twist 3-groove in 6.5 Grendel.

February 2015 - one-time availability of intermediate-length gas system .223 AR barrels in two lengths and at special prices Click Here

New as of January 2015 we are offering a 9" long .300 Blackout SBR barrel Click Here

New Products - Muzzle thread caps and Muzzle Brakes

General Specifications for all AR15 type barrels:

The .223 version is chambered with a Wylde-type chamber and the .204 Ruger with a semi-auto match-type chamber. These barrels are threaded for and furnished with a pinned barrel extension with proper headspace 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. To see additional information concerning the .204 Ruger cartridge and functioning in AR's - Click Here

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", "Lilja .204 Ruger 12T" or 6.5 Grendel 8T. Just add your gas block and tube and drop into your upper receiver.

We are also offer a reduced price chrome-moly version .223 AR barrel called our Patrolman. For details - Click Here

Contour Specifications for .204 Ruger and .223 barrels:

We make a variety of profiles for AR type rifles including the AR-15, AR-10 and M-4's as non-drop-in barrels. To see a listing of our AR type contours in a .pdf file - Click Here These other contours are not available from us as finished drop-in barrels; only those contours listed on this page are available as drop-in's.

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.

AR24: .975" diameter from the barrel extension to the gas block section, gas block section is turned to .936" diameter for a large gas block and the forward section is .875" diameter with a finished length of 23" including the barrel extension. This barrel uses a rifle-length gas system. Weight is 4.16 pounds. Engraved: Lilja AR .223 8T. To see a .pdf drawing of this profile - Click Here This profile is not threaded at the muzzle in .204 Ruger or .223 but it is threaded 5/8-24 in 6.5 Grendel.

We have these that are fluted also. There are five flutes on the front section, leaving a missing flute where the barrel is engraved and six flutes on the back section. The fluted weight is 3.84 pounds. Fluting adds $130 to the price.


AR740: .975" diameter in front of the barrel extension with the Wasp section turned to a diameter of .750" and then tapering back up to .975" diameter at the gas block. The gas block section is turned to .750" and from the gas block to the muzzle the diameter is .740". The barrel length is 20" including the barrel extension and is set for a rifle-length gas system. The muzzle end is threaded .500" x 28 TPI (threading is not shown in this image). Weight is 2.60 pounds. Engraved: Lilja AR .223 8T. To see a .pdf drawing of the profile - Click here

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.

Image of our threaded .500" x 28 TPI muzzle end.


Contour specifications for 6.5 Grendel barrels:

At the time of our 6.5 Grendel barrel introduction (January 2014) we are making these available in four contours. These are the AR740 and AR 24 contours shown above as standards for the 204's and .223's and in addition we are also stocking two mid-length gas system contours; our 19" long contours 318 & 319. To see drawings of these contours click on the designation: AR740, AR24, 318 ,319. The 318, 319 and AR 24 profiles are also available in a fluted version. All 6.5 Grendel barrels are threaded at the muzzle with a 5/8"-24 thread - (although the linked drawings above may show 1/2-28).

The 6.5 Grendel barrels are headspaced using a Maxim Firearms bolt. Headspace may not be correct with our barrel using an Alexander Arms or LBC bolt. Bolts are not included. We suggest contacting Maxim Firearms for an MF bolt at 928-486-2296.

Barrel extensions are an M4 type.

Price for all barrel types as of January 2015 is $480 or five for $430 each (contours and calibers can be mixed) fluting adds $130 or $115 with the five barrel discount price

Muzzle thread caps available - Click Here

Short Barreled Rifles (SBR)

.300 Blackout 9" long SBR - Click Here

We've been asked about making AR type barrels shorter than 16" for SBR's. We are now accepting orders for short barrels for AR's with a minimum order of 20) barrels per type. For more information - Click Here


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