Every 243 WINCHESTER Upper we sell can be configured to your specifications. Customize your 243 WINCHESTER Complete Upper with an optic, muzzle device, rail, bolt carrier group, magazine, or charging handle from our matched selection. Your 243 WINCHESTER AR 10 Upper Receiver will arrive turn-key and ready to shoot out of the box.

243 WINCHESTER (6.2x52mm) is a necked-down 308 that is ideal for small- to medium-game hunting. It is the smallest caliber legal for deer hunting in 10 US states. With a muzzle velocity of 3900 fps and low recoil, it is highly accurate at 300 yards.

.243 WINCHESTER Uppers For Sale