Purchased new direct, factory assembled. About 400 rounds through it, ran flawlessly in my AP5-P. Also works in MAC-5K and Z5F-K. Comes with slip trip and ARCfire upgrade also installed at the factory and I threw on the newer selectors with some texture. Recommend getting a 90 degree locking piece, I can sell you mine I have in the gun for $40 as an add-on if you want to hit the ground running. SAFE/ SEMI/ FRT. not a serialized item so technically not a firearm, just a part. Happy to answer any questions! $600 OBO