i have been on other forums lately and there seems to be one constant misinformed idea around the PT1911. most are afaid of the pt1911 because all the parts are proprietary. they are afraid aftermarket parts of any make will not fit or work in in pt1911's. most have not owned ,handled or ever fired a pt 1911. they go to the extreme that a slide stop other than a taurus will not work because the barrel link a pin are different size. i was under the impression taurus designed the pt1911 to mil spec tolerances but with the improvments. so the other day i took apart my pt 1911, my colt government series 80,started swaping parts to see what would fit and would not. most of the parts would drop in some would work with some minor fitting. didn't bother takink my kimber 1911 apart to see, that may be my next experiment. b ottom line my pt 1911 out shoots my other 1911's even with all the MIM parts. just wondering how mant pt 1911 owners have changed out parts? have you run into parts that would not fit because the pt 1911 is out of spec.? the only parts i have changed in my pt 1911 is a left sided saftey and a extended slide stop.