The 1131 will fit the 19,23,32 and 38. The 1131 will NOT fit the Gen4. I hope this helps.
Thanks but I went to Glock Store and they sell s bushing that will allow you to use the LaserMax LMS1131 in Generation 4 Glocks. So the problem is basically solved. Just not sure if the spring is any good as after I installed the switch/ejector the switch did not make any clicking sounds as demonstrated in a YouTube video. Also after I installed the slide back on the gun it became jammed and would not even let me rack the slide. So either I installed the spring improperly or it's bad. Just waiting on the bushing so I attempt to install it again. Thanks for your input.THEGLOCKBROTHERS said:The 1131 will fit the 19,23,32 and 38. The 1131 will NOT fit the Gen4. I hope this helps.