Glock 40cal Mag Extensions

[davidd]

Been reading up on Glock mags extensions, and it seems that some people can get 20 rounds in the 40cal mags, some 20 but non-reloadable, and some 19. I bought one of the newly redesigned Dawson extensions to try, and I can get 20 rounds in by the skin of my teeth, but it is definitely not reloadable. Any on here have any luck getting 20 rounds reloadable? Did you have to butcher the follower a lot? All I did was round the back bottom edge some as shown in the demo video (so far).

I'm using late model Gen4 mags.

 

[JBP55]

Why not use the OEM Glock 20 round magazines?

 

[davidd]

It's too long for USPSA Limited. Otherwise, yeah, factory 22 round for $35ish beats the hell out of a factory mag plus a $30 extention plus custom work, plus testing...

 

[John58]

When I had my Glock and shot limited with it, I used the Dawson basepads. The trimming of the follower was not that hard, Dave even has a video on his site that can help you out. Only took a couple of minutes and was well worth it.

 

[Jesse Tischauser]

Leave it loaded for a little while the spring will compress. Otherwise start with a 20 and reload to a 19. You should never need more than 40 rounds.

 

[davidd]

Thanks Jesse, it's been sitting with 19 rounds for about a week now. I actually forgot to check it this weekend. I was trying for 20 reloadable because Spanky has a way of setting up stages where natural reloading points are sometimes after 20 rounds. That 20th round may help keep the flow going a little better.

 

[lilbeauxdawg]

Try Arredondo base pads. I know a buddy of mine gets 20 rounds in his mags. U can find them at Arredondo's website or shooters connection.

 

[Pigfish73]

I have tried Dawson Precision, Taylor Freelance, and Arredondo. I use the Arredondo's and sold the others. No problem getting 20 rounds (reloadable) in the 40 mags. 23 in the 9 mags. I trimmed the bottom of the follower so that it's flat. I haven't had any problems from either caliber. Check out Shooters Connection, Power Factor or Shooters Source.

 

[davidd]

Thanks guys, I appreciate the suggestions. I'll give Arredondo a shot next.