size ? no diff. inside and trigger changes. The Gen1 has a WONDERFUL trigger. The G2 G3 have the 2 piece finger eater triggers.
So true! One of the main reasons that my late production first gen PT111 will stay as one of my favorite CCW's.
Also, the First Gen PT111's, like the early 24/7's, were built with a full Aluminum Sub-Framewith full length slide rails, inside a Polymer overshell.
It should also be noted that the Steyr M9 and L9 series Pistols as well as the S&W M&P series Pistols share this type of construction.
The newer Taurus Polymer Framed Pistols are built like Glocks with Rail Inserts for the Polymer Frame, which while entirely adequate, is definitely a cheaper construction.

Late Production PT111 Millennium Pro 9mm
Lawsuit be damned, I love it and I'm keeping it!!!! :shooter: