So I am looking at a lot of P229's in 40SW. The slides are 1/2 serrated. Want to convert them to 9mm. Just to clarify, I can just swap out the barrel and recoil spring to a 9mm, no matter what generation 40SW? The problem is the original German lowers that were slightly narrower when the original 9mm frame was made.

There are two ways you can go.

9mm conversion barrel from Bar-Sto or such and a spring.
Complete 9mm slide assy.

If you get a 229-1 slide and barrel you don't have to swap the locking insert as it uses the same one as .40
I have a .40/.357 slide assy for mine and the only other thing I swap is the mags.

Here is a post of mine from 4 or so years ago for a P226. I don't know if the 229 is significantly different.

"I used a EFK conversion barrel that dropped in, no problems. I have to use 9mm magazines--the feed lips on my .40 magazines are too large to hold 9mm (more on this below).

It may have been based on my particular pistol's age, but I had to get a new slide stop from Sig. As I recall, the slide stop that came with it had a wider bend for the .40S&W's ogive, so wasn't contacting the slide stop with the 9mm magazines. Sig sent this to me for free and the new one works. It's the same part for all calibers, so they redesigned it at some point.

Again, probably based on age of the gun, my .40S&W magazines have a little extra bump on the follower. With the new slide stop, this bump isn't needed, and the 9mm magazines don't have it. If the newer .40S&W magazines don't need the bump, they may also hold 9mm rounds.

In my case, figure $165 for the barrel, $20 each per magazine (at least 2) and that's about $200. For me, it's worth it to have both calibers. If you are just going for a 9mm, probably easier to find something you want (and maybe not a DAK).

For casual shooting, I have not noticed a difference in impact between the two calibers."

100% pleased with my Barsto barrel and I get to keep the same slide on the same frame.

They earned my future business anytime I need something they offer.

I also have a Bar-Sto conversion bbl in my 40cal 229 Sig. I did not need to change recoil spring or mag to get my gun to work 100% with 9mm ammo. YMMV

quote:

Originally posted by Dave Bean:
So I am looking at a lot of P229's in 40SW. The slides are 1/2 serrated. Want to convert them to 9mm. Just to clarify, I can just swap out the barrel and recoil spring to a 9mm, no matter what generation 40SW?

No.

Option 1: buy a conversion barrel.

Option 2: buy a P229-1 slide (the ones that have full height slide serrations) and P229-1 barrel. The locking insert needed is the same one already in a P229 .40 or .357.

Option 3: buy a legacy P229 9mm slide (the ones with half height slide serrations), legacy P229 9mm barrel, and P228/P229,9 locking insert.

In all cases a 9mm recoil spring and 9mm magazine(s).

quote:

Originally posted by ah3:

quote:

Originally posted by Dave Bean:
So I am looking at a lot of P229's in 40SW. The slides are 1/2 serrated. Want to convert them to 9mm. Just to clarify, I can just swap out the barrel and recoil spring to a 9mm, no matter what generation 40SW?

No.

Option 1: buy a conversion barrel.

Option 2: buy a P229-1 slide (the ones that have full height slide serrations) and P229-1 barrel. The locking insert needed is the same one already in a P229 .40 or .357.

Option 3: buy a legacy P229 9mm slide (the ones with half height slide serrations), legacy P229 9mm barrel, and P228/P229,9 locking insert.

In all cases a 9mm recoil spring and 9mm magazine(s).

In all cases I would use P229-1 mags in the .40 frame although regular P228/P229 mags will work