Upper Receiver:
Lower Receiver:
DISCLAIMER:
The Bureau of Alcohol, Tobacco, and Firearms does not classify a partially assembled AR-15 80% lower receiver as a firearm (ATF). This means you can buy and possess it without worrying about getting caught up in bureaucratic red tape. Lower receivers for the AR-15 can be manufactured out of aluminum, polymer, or steel, but the other 20% are created up of other materials. The remaining 20% of the machining is what gives these parts their "80%" designation. You'll need to make holes for the trigger pin, hammer pin, and fire control group pocket. Putting together your own AR-15 from a bare lower receiver can be a fun and affordable method to get a weapon that fits your exact needs. Gun aficionados who take pleasure in the challenge of designing and constructing their own weapons may also find this activity rewarding.
It is the builder's responsibility to check federal, state, and local regulations to make sure their finished gun is legal. Included in this are the ATF's regulations regarding homemade firearms, which can be seen on their website. In conclusion, 80% lower receivers for the AR-15 are a popular alternative for people who wish to construct their own custom rifles and have the necessary expertise and experience to do it safely and lawfully. They offer a fun and fulfilling method to acquire a one-of-a-kind gun built to your specifications at a reasonable price.
