Originally Posted by jimmyp
I am getting more interested in the 45 super over a 10mm. Need to find out how to set up a gen4 g21!



JP,

I use both the 10mm, and the .45 Super.

While the 10mm velocity is higher--for most the most part, I prefer the Super, and typically shoot either 250 grain, or 260 grain at 1050 FPS, loaded in Starline brass.

A Glock 21 works fine, but I don't have personal experience with converting a gen 4 model. Possibly there is a recoil rod/spring assembly that is already made that would work. If not, have you looked into the small bushing made by Glock Store that will fit into the recoil rod hole in the front of the slide? If it would work, this would allow you to use a non captured assembly from Wolff.

Here is a video that might help; https://www.youtube.com/watch?v=1-gZuS2Um6o

Of course you could just shell out the scratch for a USP. I've fired 250 grain pills in one since back in 1996, though not loaded to the higher Super pressures...

edit to add this video, which is a better, longer version by Angry Dick;

https://www.youtube.com/watch?v=W4MQGY87THY&t=335s

Last edited by Hi_Vel; 05/17/19. Reason: add another video
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