AR-10 chambered in .243 Winchester is a fabulous all purpose upper in part because of the all purpose .243 Winchester cartridge. The .243 Winchester is ultra accurate and outperforms other varmint type ammunition. This round fits the AR-10 platform with no alterations and has much less recoil than the 7.62 NATO.
Caliber: .243 Winchester
Barrel: 20" Inch Match Grade Chrome Moly Barrel, M-4 Feed Ramps
Rifling Twist: 1:10 RH
Muzzle Device: None
Front Sight Base: Picatinny Gas Block, Top of gas block is .398 (+/- .010) lower than top of receiver
Upper Receiver: Forged Flat Top Receiver with Picatinny Rail and Forward Assist 7175-T74 Aluminum