[TexasPOff]

As others have said, the third pin was added with the advent of the 40 cal. It was to keep cavitation of the locking block to a minimum with recoil of the 40.

At the time the long term effects of the higher recoil of the 40 having ill effects on the polymer, wasn't completely known. It was more of a preventative maintenance thing than it was a mandatory addition, because of failures.

Years later enough data has been provided by long term usage to determine the third pin really isn't needed. Yes the 9mm didn't need them, but Glock is also producing 40 caliber pistol in the 2 pin design now.

One of the MHS guns submitted, a 23X style pistol was a 2 pin gun. The Brazilian police just adopted a 5th Gen 40 caliber, also a 2 pin design.

I suspect there was a good deal of testing with those 40 caliber two pin guns. Any issues with not having the third pin would have likely popped up during their trials.

MHS23

Brazilian Gen5 40

I suspect we will see 40 caliber Gen5 guns before long. 40's are on the back burner right now, so Glock hasn't made it a priority to get them out.




TXPO