Jump to content
Brian Enos's Forums... Maku mozo!

STI mag tuning


cyburg

Recommended Posts

Feed lip width per STI info sheet:

38S, 38SC,9mm, 9x23---.355"-.360"

40 S&W---.385"-390"

45ACP---.435"-.445"

Other individual mag tuners may have somewhat different dimensions. I tweak mine open with a small crescent wrench. When I am within a couple of thou I polish the inside of the lips with a fine diamond file and then do a final polish on my buffer feeding the lips into the wheel. I measure at the rear, middle and front of the feed lips. If the lips are too wide to begin with I use a brass hammer to close them up.

CYa,

Pat

Link to comment
Share on other sites

Its seems that I'm the exception, but I put guts in a tube and go shoot. No massage required. I have almost 2 dozen STI/ SV mags that all run without adjustment of the feed lips. A couple of the SVs are out of spec and required a little beating to drop free, but they still run.

Why not try and see if they work before worrying about them?

Link to comment
Share on other sites

  • 1 month later...

I ordered them as parts, 3-140's and 1-170 with limcat base pads and I think grams springs and followers as per chuck at shooters connection and my buddy advised. 2 worked like a charm and the other 2 would not even hold the rounds the lips were spread out just a little to much. They are working good now thanks to everyones suggestions. A brass hammer, brass anvil base and a few wacks did some good. Oh ya, dont forget the the filing to get rid of the burrs around the lips. Smooth as silk now.

Link to comment
Share on other sites

  • 5 years later...

Archived

This topic is now archived and is closed to further replies.

×
×
  • Create New...