ar740.308 ar10740 threading6.5 Grendel engraving

6.5-8 Grendel AR740


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 5/8″ x 24 TPI (threading is not shown in this image). Weight is 2.43 pounds. Engraved: Lilja AR 6.5 Grendel 8T. To see a .pdf drawing of the profile – Click here

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. Fluting adds $130 to the price.

We also have for sale a 6.5 Grendel bolt made by Maxim Firearms. This bolt is a perfect match for our 6.5 Grendel barrels.

Machined from certified 9310 AQ (aircraft quality) steel

Matte black; phosphate finish

Completely assembled with extractor, rings, and ejector, ready for installation into your bolt carrier

Also referred to as “Type II” bolt which has a .136″ bolt face depth

In stock

Product Description

The 6.5 Grendel 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 11º target crown in a match grade barrel. 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. All current production drop-in barrels use an M4 style barrel extension. The front section of the barrel is engraved with “Lilja 6.5 Grendel 8T”. Just add your gas block and tube and drop into your upper receiver. ar_new_product_full 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 4 lbs
Dimensions 24 x 1.5 x 1.5 in