Converting Sig 229 from .40 to 9mm

[MikeJ]

I would like to change my .40 229 to 9mm. Can anyone tell me if I can do this and what I need other than a 9mm barrel; recoil spring etc?

 

[Walt Sherrill]

If it were only that easy.

A 9mm barrel won't work. Wrong diameter for the slide -- it'll slop around -- headspace will be wrong, the extractor won't work, the breechface might now be right, etc.

The folks who make it work use a special Bar-Sto conversion barrel designed to work in the .40 gun. It will work with the existing slide, breech face and extractor, and will headspace properly. Visit the SIG Forum if you'd like more info.

It may be that other barrel makers also make similar conversion barrels.

 

[MikeJ]

Thanks Walt, much appreciated.

 

[P95Carry]

Mike - go buy a 226 and be done with it!!

 

[CougarRed]

While Barsto makes a conversion barrel, beware the reliability of a 40/357 extractor with a 9mm round. The fit is very loose. I wouldn't trust it for defensive use.