STI Magazine Dimensions

Rockon71385 · Sep 20, 2012

Anybody know what the external dimensions of STI .40 mags are supposed to be? I know the feed lips are supposed to be .380", but that's all I can seem to find. Mine are binding up somewhere and refusing to drop free. Also, if anybody has the dawson mag tuning kit and wouldn't mind loaning it to a trustworthy individual such as myself, I would be extremely appreciative.

drmitchgibson · Sep 20, 2012

I remember seeing a thread on Enos about this. It had some dimensions listed, but I'm not sure if it amounted to a full set.

Rockon71385 · Sep 20, 2012

I've been searching over there for hours. Can't seem to find what I'm looking for.

brandt9913 · Sep 20, 2012

http://www.brianenos.com/forums/index.php?showtopic=5194&st=0&p=1721489&hl=sti%20magazine%20tuning&fromsearch=1&#entry1721489

ryanncass · Sep 20, 2012

1.370 front to back

http://www.brianenos.com/forums/index.php?showtopic=141880&pid=1594260&st=0&#entry1594260

drmitchgibson · Sep 20, 2012

Ryan Alexander said:
1.370 front to back

http://www.brianenos...0

That's the one.

The Antichrome · Sep 20, 2012

Optimum dims per Dawson.

Mag body front to back 1.370" Maximum (it should be slight under that)

Feed lips .380" in the back and up to .385 at the front. (they should flare slightly .003-.005)

I've found these to work perfectly for me.

DonC · Sep 21, 2012

If you have a steel ruler you can do a simple check to see if you have any bulges. I used a vise with hard rubber bumpers to adjust my mags but be careful not to over compress.