Good idea to cut 1 hoop of the Glock 9mm mag spring to ease off the 10 + 1?

lavino

lavino

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During the IPSC course I found that inserting a 10 rd mag with + 1 in chamber sometime is too stiff to push in the mag and I had a few dropped mag when not pushed really hard enough (more like slam on the bottom to ensure it is secure). My instructor suggested me to take the mag spring out and cut just 1 hoop of the spring (and he stressed that do it for 1 mag and just 1 hoop nothing more and test it out before try on other mags). He said that would ease off the 10 rds mag. Has anyone tried this? It does sounds like it might work and not losing a whole of the spring power. Does it make sense to you guys or has anyone tried it?
 
Are they factory 10 rounders or pinned?

Often the issue with 10 round factory mags is the follower jamming on the indents not the spring. If it is a spring issue try loading up your mags to 10 and leave them for a week to see if it helps. Cutting your spring may affect feeding. Having said all that I have never owned your gun so someone with a Glock might be able to chime in.

If it's the follower hitting the indents than you may be SOL as you can't get the followers out of those suckers to trim them.
 
These would all be factory 10 rds mag I think. Ok I see what you mean. I will try to load 10 dummy in each and leave them for a while first. I worry about doing this and I found it such a pain to remove the bottom plate just watching a few youtube vid. Thanks so much ;)
 
juancarlos said:
Are they factory 10 rounders or pinned?

Often the issue with 10 round factory mags is the follower jamming on the indents not the spring. If it is a spring issue try loading up your mags to 10 and leave them for a week to see if it helps. Cutting your spring may affect feeding. Having said all that I have never owned your gun so someone with a Glock might be able to chime in.

If it's the follower hitting the indents than you may be SOL as you can't get the followers out of those suckers to trim them.
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There wouldn't be any indents as the Glock mags have a steel liner molded in plastic. Unlike steel.mags that have that indent.

I've actually been able to squeeze out the follower by tipping it above the indents and just sliding it thru.
 
I had the same issue with factory 10 rounders for my M&P. I removed 1 loop and trimmed the follower about 2 mm; they work fine now. Apparently S&W uses the same spring in the 10rnd mags as the 17rnd mags so they're too long to begin with. I don't own a Glock so I couldn't say what they do.

Leaving your mags loaded will not weaken the spring. Springs lose their strength from repeated compression/expansion.
 
Zee705 said:
I had the same issue with factory 10 rounders for my M&P. I removed 1 loop and trimmed the follower about 2 mm; they work fine now. Apparently S&W uses the same spring in the 10rnd mags as the 17rnd mags so they're too long to begin with. I don't own a Glock so I couldn't say what they do.

Leaving your mags loaded will not weaken the spring. Springs lose their strength from repeated compression/expansion.
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Then why is it that I couldn't get more than 5rds into my fmk mags at first, but after leaving those 5 rds in the mag for a week or two, i was able to get the other 5 in?

While i agree that it wont harm the spring, it certainly can have some effect on it.
 
Suther said:
Then why is it that I couldn't get more than 5rds into my fmk mags at first, but after leaving those 5 rds in the mag for a week or two, i was able to get the other 5 in?

While i agree that it wont harm the spring, it certainly can have some effect on it.
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Couldn't get more than 5 in a 10 round mag? Sounds like something other than spring tension.
 
Suther said:
Then why is it that I couldn't get more than 5rds into my fmk mags at first, but after leaving those 5 rds in the mag for a week or two, i was able to get the other 5 in?

While i agree that it wont harm the spring, it certainly can have some effect on it.
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Because the set wasn't removed from the spring or the spring used was crap quality. Regardless, Zee705's right.
 
Suther said:
Then why is it that I couldn't get more than 5rds into my fmk mags at first, but after leaving those 5 rds in the mag for a week or two, i was able to get the other 5 in?

While i agree that it wont harm the spring, it certainly can have some effect on it.
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It certainly can not. As you as you stay in the spring's range (don't overload it) there's no amount of time under tension that will weaken it
 
We have had luck by taking the Glock factory 10 round mag apart (not the pinned 10/17) and shaving down the 4 little legs on the bottom of the follower down a bit so the follower can go down a little further in the mag body. We have never cut the mag springs at all. This works especially well with the 10 round .40 mag it is virtually impossible to use with 10 in the mag and 1 in the chamber. Without this mod, it will induce a stoppage in the .40 frequently. Have not noticed this to be as much as a problem with the 9mm mags, YMMV.

The pinned 10/17 mags should not have this problem unless they have been pinned incorrectly and only allow 10 rounds with no play or further movement.

From what I can see, Glock uses a different mag spring for 10 round mags, than the one for 17 round mags which are double stack while the 10 round mag is a single stack.
 
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Don't trim your springs. That's really bad advice.

The springs will eventually "wear" so that after break in they will work fine. If you trim them, it will lead to random feeding issues (from the last few rounds) and you have to replace all your springs like the IPSC guy at our local range who did this very exact thing.

Removing material at the bottom of the follower is probably the best bet if you can't learn to seat your mags hard. Just pretend they're someone you don't like.
 
DT741 said:
Glock factory mag loader solves that problem easily
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For loading rounds, yes. But when you go to insert a magazine on a closed slide with a new mag you have to "slam it home" as it were.. in order to seat the mag properly.
My G17 is 3 years old, mags work fine after many thousand rounds through the mags.

You could also buy used mags which have been "broken in" already.
 
Again, with an M&P mag, I trimmed the 4 "feet" 1-2 mm each. They seat easily loaded to 10 rounds on a closed slide.

I have done this to 6 mags, 3,000 rounds through the pistol, 0 mis-feeds.

I'm not going to tell you what to do but this is what I've done and it works perfectly.

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