Product Details
This upper receiver is the top half of your rifle - the part that holds the barrel, bolt, and gas system. It's made by Colt and chambered for .223 Remington or 5.56 NATO ammunition, so you've got flexibility if you ever want to swap between them. It comes with the little dust cover to keep things clean, a forward assist to help seat the bolt, and M4 feed ramps so it'll run reliably with most ammunition out there. Great foundation piece if you're building or upgrading.