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M17 Issue: 2/3-Round Burst


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#1 aznriptide859

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Posted 03 November 2011 - 04:11 PM

Getting annoying continuously fixing my M17; it seems my Glock, no matter what short mag I use, is shooting in 2 round bursts at lower power. The gun has been upgraded with a stronger recoil spring, hammer spring, and a PGC slide.

Any ideas which part is causing the problem? Thanks!

#2 niko_gpsy

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Posted 03 November 2011 - 06:13 PM

I am thinking the slide but easiest to check would be he recoil spring first.

#3 aznriptide859

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Posted 03 November 2011 - 08:46 PM

What should I check for when inspecting the slide and/or recoil spring?

#4 Fluffy Boy 32

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Posted 04 November 2011 - 11:37 AM

The recoil spring may be making it cycle faster because it's stiffer. Same thing with the upgraded hammer spring.
Try swapping out one or the other out for a stock spring and see if that works...

#5 niko_gpsy

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Posted 04 November 2011 - 12:35 PM

I am thinking that the recoil spring may be too stiff as Fluffy pointed out.  So as suggested, swap it out for stock and see if it resolves your issue.

#6 aznriptide859

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Posted 05 November 2011 - 11:13 AM

Roger, will try it out and report back. Thanks!

#7 aznriptide859

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Posted 06 November 2011 - 01:48 PM

Did both - no problems were solved. Switching either the recoil spring or the hammer spring back to stock strength involved more problems, including venting and continuous auto fire. At least with both upgraded springs, it seems the two-round burst is pretty consistent 0_0.

The slide is a PGC one, could there be a chance that it's causing the problems?

#8 niko_gpsy

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Posted 06 November 2011 - 04:35 PM

Have you checked the internals in the slide for damage or anything unusual?

#9 Fluffy Boy 32

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Posted 06 November 2011 - 05:07 PM

Just a thought, Did you switch BOTH out or only one or the other?

#10 aznriptide859

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Posted 07 November 2011 - 10:21 PM

Only one at a time - haven't tried both.

The slide is brand new, what issues inside would I be looking for?

#11 niko_gpsy

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Posted 08 November 2011 - 09:31 AM

See if the cylinder operates smoothly. With the slide off and barrel out, pull on it and see if it bounces back smoothly and completely.
If so, you may even need to take the jet valve and spring out to see if it seats properly inside the cylinder. Sometimes a drop of silicone oil in the cylinder is all it takes but being an aftermarket part that you have, anything is possible at this point.

#12 aznriptide859

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Posted 09 November 2011 - 04:20 PM

Might have found the problem, and yes it was with the slide. I did a quick BBU comparison with my KWA M34 slide, and it seems the BBU sits too far inward in the PGC slide (which is odd since my PGC M18 slide fit without an issue). I shimmed the BBU downwards with some tape, and so far it works well. I just reinstalled the stronger hammer spring but I haven't tested it yet - hopefully it'll work now.

Now that this has come to light, why on earth are KWA Glocks so damn picky/needy with tolerances?!

#13 niko_gpsy

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Posted 09 November 2011 - 06:01 PM

All companies have their own spec and will differ in design to a degree.  Or maybe we just like to be different. lol
Glad you figured it out.

#14 aznriptide859

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Posted 10 November 2011 - 09:26 PM

None more frustrating than KWA apparently. My TM M17 is nowhere near as picky.

Edited by aznriptide859, 10 November 2011 - 09:27 PM.


#15 niko_gpsy

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Posted 11 November 2011 - 11:31 AM

View Postaznriptide859, on 10 November 2011 - 09:26 PM, said:

None more frustrating than KWA apparently. My TM M17 is nowhere near as picky.
Well since most parts out there are TM clones it's only logical to assume the abundance of parts for that brand.

#16 aznriptide859

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Posted 13 November 2011 - 01:12 PM

TM x Guarder has been a pretty good combo for me. Might just go down that line in the future :)




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