ar24.204 Ruger Engraving

.204 Ruger 11-Twist AR24


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. To see a .pdf drawing of this profile – Click Here This profile is not threaded at the muzzle in .204 Ruger.

We also keep fluted version of these in stock. 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.

Only 1 left in stock

Product Description

The .204 Ruger is chambered 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 11ยบ 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 .204 Ruger 11T”. Just add your gas block and tube and drop into your upper receiver.


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.


Additional Information

Weight 5 lbs
Dimensions 24 x 1.5 x 1.5 in