: Builders must source a brand-new or intact surplus barrel and a newly manufactured semi-automatic receiver, or expertly re-weld the cut receiver pieces with heavy internal modifications to prevent automatic fire.
Parts kits enter the market in surplus batches and quickly go out of stock. When looking to buy or source components: DP series semi auto parts and Mods - SmgGunsStore
: Kits generally feature a bolt, bolt carrier, gas piston, bipod, stock, trigger group, and the massive top-mounted "pancake" drum magazine.
: Because the receiver (the part legally considered the "firearm") is destroyed, these kits can be shipped directly to your door without an FFL transfer. 🛠️ Turning a Kit into a Firearm