The best parts and accessories to build your budget, mil-spec, or ultimate AR-9 9mm rifle. Cast, CNC, and forged 80 percent lowers, lower parts kits, tiggers, upper receivers, and everything else you need to complete your ghost AR9. We’re also the best place to sell your guns. Whether you’re selling a large gun collection or just a single inherited rare firearm, RIAC is the best and easiest way to sell your collectible firearms for the most money. Read about our consignment process and look at our past results. We’re the best at what we do.