Sigma 40 Mag Springs

Discussion in 'Other Handguns' started by Wulf, Jan 26, 2006.

  1. Wulf

    Wulf Premium Member

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    Howdy All :)

    I am trying to find some Smith&Wesson Sigma 40 Magazine springs. MEC-GAR, USA doesn't manufacture mags for the Sigma Series. My email to Wolff Springs got me the following email response,

    ..."At the present time we do not have Sigma magazine springs for retail sale."

    John Andrews
    Wolff Gunsprings
    jdandrews@gunsprings.com

    I'm not exactly sure what to make of that response, so I've emailed John Andrews back asking him to please expand upon his response. Hmmm, 0 for 2. :( So the search goes on. I'm hoping to solicit some assisstance from the forum members for this magazine parts aquisition. Plz PM me ASAP with any contacts in the industry or ideas of where next to turn. Thanx for your attention in this matter.

    Wulf

    Sorry to have posted so ambiguosly to the forum. The Sigma springs are directly related to a magazine conversion option of Sigma 40 magazines for use in the Steyr M and S Series 40 S&W and 357 SIG's. Sorry for any inconvenience or misinformation for the post. In future, I'll try to be more concise. Thanx.

    Wulf
     
  2. bigtaco

    bigtaco Active Member

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    brownell's has them. brownells.com

    the spring:

    s&w part # 250540000

    borwnell's stock # 940 000 676

    price: 6.58

    the follower is 4.98

    just do a search for sigma magazine at brownell's and all kinds of possibilities pop up.
     

  3. Shooter

    Shooter Premium Member

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    Those prices seem to be fine for replacing the Sigma springs.......S&W would probably be similar......good enough considering they don't need changing too often. I'd rather pay a little more for quality parts.....I'm thinking of getting the Sigma 9 back from my friend and doing the "cut" for the Steyr myself....since I don't have a Sigma anymore, I can experiment and if I scew up......no loss........I think after seeing Wulf cut his, I'll try cutting down the cutting wheel to half the size so the notch will be smaller, or I'll drill and get a small file.
     
  4. FlaChef

    FlaChef Guest

    9mm sygma mags are skinnnier and do not fit supposedly.
     
  5. Shooter

    Shooter Premium Member

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    Just finished my first Sigma 40 retro-fit......field testing tomorrow, 15 rounds fit nicely with very snug lock up, better then the original mag.
    It's not "dropping" out though, it will have to be pulled when empty.... I'll do the finish work tomorrow and do the second one.........good work Wulf :lol:
     
  6. Wulf

    Wulf Premium Member

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    Hiya Shooter :)

    Try filin' a bit more out of the top of the window. The mag should drop free when the pressure from the mag release is relieved just a bit more. You should feel it in just a couple swipes of the file. Good job, Bud. You'll love the new mag...15 rounds o' kick a**! Factory wise, 12-rounds was the most you could expect. Take your time and make it happen before the next mag is under the knife. From personal experience, each mag conversion gets easier because you know what to expect. Don't get too cocky, but feel the confidence and know that its gonna happen just the way you want it to. Hava great weekend.


    Wulf
     
  7. Wulf

    Wulf Premium Member

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    Howdy All :)

    I just received the Wolff Sigma 40 hicap magazine springs from John Andrews and there's great news for our members who prefer the factory Steyr 12-round hicap mags to the Sigma 15-rounders. This concerns the M40's and M357's. Switch the Steyr spring with the Sigma spring and you can add a 13th round to the M40 and M357 factory mags. I did make a cut to the Sigma spring at the top of the mag spring, just in front of the "follower hook". The location of the magazine spring keeper hole for the Steyr follower is a bit forward of the Sigma hole. I could probably take the time to cut it and bend it so it fits the hole precisely and probably will on the next one, but it was easier to just cut the "hook" off the Sigma mag spring. If you want to bend the spring to more concisely fit the Steyr follower then leave enough of the spring just in front of the "hook" to make the bend. You'll understand when you have the magazine disassembled and can view both springs and the keeper hole. I don't know if the same can be done for the S Series mags because I don't have one to try it. <shrug> This mag spring switch may have similar results with the M9's and S9's, I just don't have the magazines or springs to experiment with unless I purchase them. If anyone has a 9MM Steyr and the inclination to findout whether or not they have this same potential for increased magazine capacity, plz post away. The Wolff springs should be available soon. I'll check back with John and try to get an estimated availability date for the mag springs. I do think that it was very generous of John (jdandrews@gunsprings.com) to donate a 3 pk of Sigma 40 springs for our enlightenment. I encourage those of you whom this data has impacted to thank him via email. Its always nice to be appreciated and forums have more clout than individuals when it comes to purchase power, IMHO. Hava great Superbowl weekend! :)

    Wulf
     
  8. Shooter

    Shooter Premium Member

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    Good work.......Wulf. got the Sigma mags, cut the holes and it works great in the Steyr 40....more testing this weekend.....
     
  9. FlaChef

    FlaChef Guest

    so how does it shoot/feed?
    slide lock back OK?
     
  10. Shooter

    Shooter Premium Member

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    Tried it out today and got rained out after only 45rounds. Of that 0 FTF or FTE'S.......Slide locks back nicely......I'll try to shot a couple hundred rounds tomorrow to test it further..............Locked up on mag release on empty on one mag, but that is probably due to my cut that needs a bit of filing..........14rounds started out well. The 15th round made the slide very difficult to rack on first round......Some break in period would probably fix that.......
     
  11. Shooter

    Shooter Premium Member

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    OK......shot lots of 40's with the S&W mag and I can't recommend it for self-D
    yet...It functioned pretty good with 2 FTF's that were "nose dives". Pulling the slide back just slightly allowed the bullet to reengage the ramp correctly and feed.

    More problematic is the lock-up of the mag release......Maybe Wulf can get some range time in and see what he thinks....It only happens after firing a mag load and not just loading a mag (empty or full) into and out of the gun. I can't depress the mag release button. I still think its my cut and needs just a touch of filing.......but it could be the mag spring tangling with the latch on the opposite side of the pistol grip. The new cut exposes the mag spring at that site.

    I haven't looked at it closely and unfortunately unlike metal guns I can't just take off the grips and check the lock up system.....

    Self defense still remains Steyr mags......
     
  12. Wulf

    Wulf Premium Member

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    Hiya Shooter :)

    I ran 100 rounds of factory Winchester 125 gr FP from Wal-Mart and about 70 rounds of 124 gr Speer GD HP's thru the mags today. I didn't have any problems with my M357. <shrug> Actually, I haven't had any problems at all since I got it back from Steyr. I've got 4 15-round Sigma 40F mags that I've converted now and am alternately trying them out. I did drop a full mag and cracked the back of the base plate. I'll go online to http://www.smith-wesson.com and get a couple base plates to have on hand. I loaded some Speer 155 gr GDHP's for my Walther P99T and experienced some difficulty with the HP's jamming low into the ramp and preventing it from loading the round. Applying a little pull to the slide allows the bullet to shift and the slide to slam home. My guess at this time is that the spring in the Sprinco management reduction system is a bit strong and will require more rounds to break it in better. I do think that I've found a good load for the 40 S&W. If anyone is interested, PM me for the reloading data. The Speer 155 GDHP's are consistant, hard hitting and very comfortable to shoot in my Walther. If anyone knows of a good 155 gr plated HP that I can buy in bulk, plz PM me with the info. Oh well, thanx for posting the info, Shooter. I'd love to compare the mags you converted to my own to see what the differences are in the cuts. If you have a digital camera, maybe you could take a few good pics of the window to send me. If you like, I can do the same and we can compare. One other thing about the differences in our mags are the springs. All the springs in the Sigma mags are new. 3 are the new Wolff springs that John Andrews sent me to try out. BTW, they are nice springs, indicative of the fine Wolff springs legacy. I put 2 of the Sigma 15-round mag springs in my Steyr factory 12-rounders and the capacity increased by 1, that makes them 13 +1 magazines now. They both work well with no indication of any problems, though I have only put a couple full mag loads through each of them. <shrug> Oh well, gotta go. Hava great week.

    Wulf
     
  13. Shooter

    Shooter Premium Member

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    Going tomorrow to continue the testing of Sigma 40cal mag conversion. So far the testing is very good and out of several hundred rounds only two FTF and two FFE's. Several hundred rounds more tomorrow. I'll also be converting a Sigma 40 cal mag for Steyr 9mm.......so far I've got 17 rounds fit into Sigma mag without the proper adjustment of the top...and a 9mm follower.....more to come on that one.....but the 40cal conversion seems to be working out really nicely......its fun to pump in 15 rounds of 40 x 4 in a short time in a small target..........especially after a long week :lol:
     
  14. Shooter

    Shooter Premium Member

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    I actually found an original Sigma at the gun shop in excellent shape. I was considering buying it cause it was priced so low, 350. asking price without bartering, I could probably get it for 325......then I thougt why?? I have three Steyrs for 300.00....... :roll:

    I would be bending the feed lips and putting the 9mm follower in the mag for the tryout.......I actually shot some 9mm by mistake, I took the mag with my M9.....it worked but I would be FFT's due to the angle the 9 round slipped into due to the wider lips........
     
  15. Shooter

    Shooter Premium Member

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    OK......back from a good morning at the range....the Steyr M40 was awesome
    ....and the Sigma mags worked very well. I had one FTF which turned out to be a "nose dive" and when I reracked, the bullet popped up and in easily. These are the only FTF's I've had and they are few and far between.

    I shot three 15round mags as fast as i could pull the trigger and reload (with good point shooting accuracy, i might add :wink: ) and had no problems. I pulled out my long slide Glock 9mm with the KKM comp barrell and blasted a big hole in the target, but ya know I had to go back to my Steyr :lol:

    All in all I'm loving the Steyrs and after 600 rounds I feel really comfortable with the thought of leaving the house with three loaded S&W Sigma mags with Self-D ammo, that's 45rounds + one of 40cal 8)
     
  16. Shooter

    Shooter Premium Member

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    I wonder if that is why the occasional nose-dive occurs....I think you mentioned that some time back :idea: