Safety & fitment issues! I purchased two (2) GSX100 frames. The holes for the trigger pin and the locking block pin were NOT placed correctly. The metal frame rails are sharp and cut into the slide. The rear rails are also not square with the frame. The rear frame rails are also too high and do NOT allow the striker to contact the trigger bar sufficiently which allows for premature release of the striker, or with tolerance stacking can and does in some cases cause the striker to miss the crucifix on the trigger bar completely so the gun will not fire. Also, the fit of the magazine release is poor as the lower front portion of the release stands proud of part of the frame on the right side which creates a sharp edge and looks bad. The frames came with a note mentioning the user might have to file the locking block or frame with the "included" file which was not included. It turns out the holes were much too far off for the average user to fix and in my opinion, most gunsmiths would not be willing to modify the locking block or frame as much as is necessary for assembly. I realize "it was designed to be tight", but I doubt it was designed so the holes do not align with the locking block. Although I was eventually able to get the locking block installed with the locking block pin and the trigger pin, the interreference is too tight for the pins to be removed without a hammer the way Glock intended and stock Glocks can be. The funny thing is the holes actually fit too far loose without the locking block in the frame. My guess is the holes have been enlarged slightly oversize in order to accommodate the poor placement of the holes which do not align correctly with the block. I watched the product video prior to purchasing and heard words such as "we did a damn good job" and "it's a high-end mold" only to be disappointed in fitment issues I would not associate with the comments in the video.