MM, I am a big fan of grinding down the back of my glocks and reshaping with devcon but this is issued, I cannot even swap out the sights.
Free me use it as you like!!
I was also advised this problem has already come up. Glock is already making a "4.1" frame with a tiny bump right below the back of the slide that will help the backstraps stay in place. Yet another reason I wish I could trade it in for an M&P.
Hunt hard, kill clean, waste nothing and offer no apologies.
"In rifle work, group size is of some interest...but it is well to remember that a rifleman does not shoot groups, he shoots shots." Jeff Cooper
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