[focus2]

I have a G21 gen.2.5 and wound like to find out how long and how many Glock made the gen 2.5? Thank's..........

[MakeMineA10mm]

I would call them "uncommon." Don't know if anyone knows an exact number for you, but the place I'd start is the Glock Serial Number Thread in the "useful information sub-forum. Scanning that will tell you the approximate era of the Gen2.5 and you can then see how many of those were G21s.