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Convertion kits for changing .40 cal. to 9mm..any?

first_timer
I think I'd like to be able to shoot a few of my .40 cal. pistols in 9mm now and then.

I've heard of user convertions kits.
Are they as simple as swapping out the barrel, guide rod and spring, and 9mm magazines?
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Comments

13 comments

Date Votes
  • dheffley
    .40 S&W to .357 SIG is a common conversion because the head of the case is the same, but to 9mm would bring up a bigger issue. In most cases, you have to have a different slide so the extractor will grab the smaller head of the 9mm case.

    I have a Kel-Tec P-40, .40 S&W. When I want to shoot .357 SIG, all I do is change the barrel. If I want to shoot 9mm, I have to change the whole upper including the slide with a P-11 (9mm) conversion kit.

    .40 S&W to .357 SIG, easy.

    .40 S&W to 9mm, a big deal.
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  • first_timer
    Can you tell me how much different the recoil on .357 SIGs are as compared with .40 S&W?
    Are there any .357s with the same +/- 950 muzzel fps velocity?

    And how much does new .357 SIG ammo cost, please dheffley?
    I get .40 S&W(I use 180 grain) for $12 per 50 round boxes...and could get 50 rounds of 9MM for $6) Does .357 cost about $6 ot $7 for 50 also?
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  • dheffley
    Recoil on the .357 SIG is about the same to slightly more than the .40 S&W. The velocity is a little faster in the SIG. The ammo price is a little more than .40 S&W because it is less common. If you are wanting to reduce recoil for practice shooting, and want to reduce cost, all you have to do is start reloading or find a ammo remanufacturer in your area. You can reload in a lower power range for around $4 a box, or buy reloads for around $7 a box around here.
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  • first_timer
    thanks for the heads-up, dheffley.

    My thought about 9MM (temporary) convertions were because I'm introducing my teenage sons to shooting and gun safety. And 9MM doesn't kick "as hard" a .40S&W.
    So if the .357 Sigs are hotter and cost more....I may have to bite the "cost bullet" and get a full 9MM conversion slide, barrels and all, for a couple of my pistols.

    Thanks for the info, I appreciate your prompt response, friend.
    I'm just now starting to reload my .40 brass, and I'll just get 9MM dies too.

    Thank you,
    dS
    (Semper Fi)
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  • tsavo303
    keep in mind It might be cheaper to buy a 9mm trade in. ie glock beretta or smith. They all can be had for $350 or so
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  • 1911a1-fan
    what guns do you have in mind?, the ejector would be the biggest problem, you may be better off with a .22 conversion

    .357 would not be an option if your looking for reduced recoil, i find them ridiculously loud myself, the head of the case is what is different, the rim is the same, a .357 sig is a bottled down .40 s&w
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  • first_timer
    I here Glocks can be converted, But I'd like to keep most of my semi-auto pistols at .40S&W for my use, BUT for introducing my young teenages to target shooting and gun safety, I want to temporarily make some 9MM for it's lower recoil(And then back to .40 for my use later) I'm NOT interested in converting to .357 because of the much hotter load then my usual 180 grained .40S&W rounds.

    I've seen ads(somewhere, but forget where?) for conversion kits that include a new rack slide, barrel, rod/spring and magazines for about $200 (less than a whole new pistol).
    I know the full conversion kits probably don't come for all pistols.

    I will start reloading 9MM then too. The cost of buying 9MM ammo for them to shoot is HALF that of .40 cal.

    (My Baby Eagle and CZ75B are fine like they are as .40 cal.(don't want to have them try it until ready to step up to .40 S&W). I was thinking more like my Sig, Glocks, or Taurus, Springfield XD subcompact, or whatever others are "temporarily" convertable).

    I've heard that Glocks can convert by just swapping barrels, is that right?

    Whatever brand conversion kit(or barrel) I get...everything Would need to operate flawlessly since my kids will be using those pistols. I would NOT want any glitches or jams!!!!

    I really would go the extra mile fore safety of my kids by buying 9MM extractors too....in fact I'd Prefer doing that for my peace of mind with my kids safety, please.

    Who sells those?
    Can I swap out extractor parts myself too?
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  • KrisW
    I have heard you could swap the XD pistols around like that. Never talked to anyone that had done it though. Someone here was mentioning it at one time iirc
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  • first_timer
    I'll check into XDs(my only one is the subcompact model), but what about Glocks, please?
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  • 1911a1-fan
    only the .40, and .357 sig can cross over, the ejector on the 9mm WILL HIT THE PRIMER on the .40
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  • Colt Super
    FT -

    Have you ever fired a 9MM ??

    I find that the recoil impulse on a 9 is much sharper(to me) than a .40.

    I also find that felt recoil(for me) is less in a .45ACP 1911, than it is for a .40, or a 9.

    Maybe it's my twisted up hands.

    Doug
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  • first_timer
    Yes,
    KAHR 9MMs, and they kicked Hard!
    I just presumed it was the KAHR pistol and that othe 9MM guns would be "gentler" than the KAHR.

    I just figured "smaller caliber with similar muzzle fps, less recoil" than a .40 (larger caliber).

    Is that wrong?
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  • 1911a1-fan
    i doesn't work that way exactly when dealing with 9mm-.45, it all has to do with bullet weight vs. velocity, a down loaded 180 grain .40 will achieve the same foot pounds as a high velocity 124 grain 9mm, but it will have almost zero recoil, a down loaded 230 grain .45 all you will see is the slide move, zero recoil, most factory ammo substitutes allot of things with a bit of extra powder, most people relate recoil with power, and is not necessary in allot of cases such as yours, corbon is a prime example
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