AR-15 Lower Receiver Parts

Build an exceptional AR-15 with high-quality lower parts kit from AT3 Tactical

Among the different AR-15 parts, the lower parts kit is the most important.

In AR-15, the lower receiver is considered the legal receiver or the legally controlled part. Hence, it’s the part that is serialized.

Browse through our list of standard AR-15 lower receiver such as buttstocks, receiver extension buffer tube parts, pistol grips, triggers, magazines, and other lower parts kit.