I finally got to test fire mine today, in the rain, ran well, its fast with the 3 round burst trigger in it....a couple of bugs to be work out .....the bolt shaves( rubs ) the top side feed lip of every mag though

, Korean, Glock and ETS mag now , I guess they will be dedicated to this gun, also the bolt stop has trouble holding the bolt open ???, might need to clearance it some or look at the enhanced models, its a Palmetto lower, palmetto 9mm bolt and Spikes Upper.... and the plastic mag button has to go, I know Spikes and others sell a billet aluminum one, I can see where the plastic mag button will definitely wear over time...it has a hard time inserting mags on a close bolt too
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https://imgur.com/a/t3SAy
In the days of the old west a 6 shooter was as common as cell phones are today and just annoying if they go off in a theater.