it is a ballistic advantage glock 19/45/19x or any of that size or even a glock 26 fits gen 3,4,5 paid 160 after tax at bass pro a year ago has like 100 shots thru it pretty good condition has multiple grooves for the different gens i had it on a 19x a 19c a glock 26 a 19 gen 5 and a 45 fits all types send me offers also have a universal mount too remove back sight and put a optic plate with a bunch of holes for any mount