A modular approach to the AR-15 lower receiver, benefitting both durability, print times, and the first lower with the ability to swap calibers on the fly. This lower is also the first to have a fully-printed buffer tube/stock system that attaches directly to the lower. This lower also has the option to utilize the UBolt for increased durability and strength.
Available in 5.56, .45 ACP, and 9mm.
STEP files included.