Stronger Mag springs T100

[Boriqua]

I was wondering if anyone had a source for more powerful mag springs for the 15 rd mecgar that comes with the t100. My wife is still having issue where now and again the gun will lock open when there is one or 2 rds left. Tristar sent us a new slide stop but it hasnt gotten rid of the problem. I still think its a break in issue but wanted to try heavier springs.

I am pretty sure I cant just take out the mag springs in there and give them a tug to make them longer ... right? Doesnt really change the spring rate.

[jwc007]

I would use Wolff +5% Extra Power Magazine Springs for the Cz75 Compact:  https://www.gunsprings.com/CZ/75%20Series/cID1/mID16/dID91#842

[Boriqua]

what is the negative side of going to +10%? Just curious.

[WiskyT]

l'm not sure how a stronger mag spring is going to prevent the issue you are having. 

l used +10% Wolff springs in my Beretta 96 mags and they didn't cause any issues, but then it might be easier for me to load mags than for your wife.  The only reason l used the higher power mag springs in my 96 was because it was previously issued to who-knows-who and l just wanted new springs for piece of mind.

No, stretching the springs you have will do nothing to increase the spring rate.

Something is tripping your slide stop like a thumb or a bullet nose.  lt is almost always a thumb, especially with everyone running their thumbs down the side of the gun which l never thought was a good idea.

My buddy who is still on the job says that NJ now mandates thumbs forward for training for LE.  They don't have to shoot that way in the field or on the range, but the instructors must teach it that way for recruits. He tells me that slides lock back all the time depending on gun model.  Glocks, with their small stop rarely lock back when they aren't supposed to, Sigs do it all the time, go figure looking at the stops and where the thumbs end up.

[Flibuoy1]

I have a couple T-100s. In my limited experience and research this is not a common fault in this model.

New purchase or used? If new did it happen from start? Does it always happen, even shooting one handed? Does it behave in the same way when shot by another? Firstly,  it is important to insure the slide lock fault is not operator induced. Ammo types all behave the same?

I have 4 mags, they faultlessly interchange without regard to a difference of 3-4 years in service,  a difference of a couple thousand rounds, some sit fully loaded, some empty, at the range I often load partially to 3-6, after working on it with only 1 in mag, then two etc ..maybe I just got lucky with 4 good mags?

The exposed hammer models Canik puts out are too reliable. Something is up with yours and first we have to sure it is the pistol. Trying to be helpful here, not intended as criticism, just trouble shooting the cause of shooting trouble. Hang in there and know it can be rectified, but, in my opinion, probably not with a mag spring change.

[jwc007]

what is the negative side of going to +10%? Just curious.

I do use the +10% Wolff Magazine Springs in my .45 Witness Magazines as the .45 ACP Cartridge does seem to benefit from the extra push.

I did try them once in some 9mm Cz Magazines and will NEVER do that again.  Made the Magazines too stiff to feed freely and bulged out the sides of the Magazines a bit, so they would not drop free.  They also took almost a year of use to wear in to the point of where I could trust them.

[Practical Shooter]

I don't understand how a magazine with 1 or 2 rounds in it will lock the slide back.
Only the magazine's follower will push the slide stop up, this action will stop the slide from closing.
It has to be a slide stop issue, or it could be an operator error. Your wife could be inadvertently pushing the slide stop up.
Does this happen to you when you fire the handgun?

[Boriqua]

I don't understand how a magazine with 1 or 2 rounds in it will lock the slide back.
Only the magazine's follower will push the slide stop up, this action will stop the slide from closing.
It has to be a slide stop issue, or it could be an operator error. Your wife could be inadvertently pushing the slide stop up.
Does this happen to you when you fire the handgun?

I am 90% sure she is not hitting the slide stop. She shoots thumb over thumb not thumbs forward. we are going to the tange today adn I am going to run a couple few mags through it and see if it happens to me. It might be limp wristing.

[Boriqua]

Well I was able to reproduce it and  .. it aint me. Good news is .. I think I isolated it to one mag. The round seems to move about 1/4 inch forward but locks the slide open on the last round. Not a huge deal but I kinda want it to work the way it should so now .. I dont know what to do next except try heavier mag springs or

The mag drops fine with the one round in  it so its not jamming.

Shot about 50 rds through one mag loading about 6 or 7 at a time and no problems. Switched to the other mag . BAM first try and last round still in mag. Went again and same thing happened.

Cool bit though .. man oh man this little turk has a sweet trigger. I will have to say this out loud .. the trigger out of the box is far nicer than my CZ.

[Boriqua]

Just reporting back. I replaced the spring in the problem mag with the +5. I had my wife send 4 mags loaded to 10 rds downrange and the mag locked back only when empty so it would seem in the short test that the spring swap did make a difference.

Things you should know ... the Mag has a funky internal baseplate. Instead of the spring going through some type of hole in the inner baseplate there is just a plastic plate and the spring is held in place by simply going around it and being held by pressure and two shallow indents.

The original springs are a progressive type spring. the lower half has wide coils while the upper half or so has narrow coils. Not sure why .. I am sure someone much smarter than I figured that was a good Idea but I have never seen anything like it in handgun mag springs.

The wolf +5 is a straight spring and the lowest coil doesnt actually fit around the baseplate catch so you will need to do a tiny bit of tweaking with a needle nose to get it to fit up properly.