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Doesn't get simpler than this. I love banging away with this thing, the only mod I would ever want is possibly a larger ejection port. Its from Armco, so everything works great, a real "sleeper".
Actually they are cousins: NP58 Sig226 clone in 40S&W and plain vanilla 1911A1 with Colt slide lock, long trigger, reshaped King's drop-in beavertail, ring hammer and Pachmayr grips. BTW, these two, together with a Ruger P90, came in a trade for my Mini-30/Aimpoint3000.