KWA/KSC/ASG Glock not always locking back

[richw]

I'm thinking I've got an issue with low power gas (or cool down?), which is causing my Glock 19 not to lock back when the magazine is empty. I don't know much about gas guns at all so any pointers would be helpful!

When I crono, its about 305fps +/- 4 fps, although I think my crono is slightly under reading by 5-10fps. Using ******* gas (the can doesn't give anything away).

It will lock back fine if:
- I manually move the slide back
- Remove the mag and hold it in my hands for 20 seconds, pop it back in and fire it
- Hold the pistol downwards and fire, it locks back fine (9 times out of 10).
- The fuller the mag is, the better

With the last one, I'm wondering if the the rubber on the top of the mag needs replacing/a spacer or if its just coincidence that it works!

[simon]

Re: KWA/KSC/ASG Glock not always locking back

Its normally the follower on in the mag that when empty pushes on the slide release making the slide lock back. Look on the outer side of the mag below the feed lip and you will see it.
Take the slide off and insert the mag, you'll see how it works.
When the mag is empty of bb's but still has gas in does it lock back? Just wondering if when you've emptied a mag if there is enough gas in to cycle the pistol?

[richw]

Re: KWA/KSC/ASG Glock not always locking back

Yes there is enough gas to cycle. Even if I reload the mag (not adding gas), shoot the magazine empty, remove magazine hold in hand for 20 seconds, reinsert and it will lock back!

[jakeas]

Re: KWA/KSC/ASG Glock not always locking back

sounds like there is a poor gas efficiency. if the gun is 'cycling' with and without pellets, it shows that there isnt a major problem. but, the problem could be enough to allow there to only be enough gas to propel a bb and only half cycle, re-loading the chamber but not engaging the slide lock.

if you look, you will find that the slide does not require an entire cycle to re-load the chamber. now, this could be me. but i would suggest having a look at the seals and the piston head. if not it could be anything to do with the BBU. So, if you can, i would take it apart and look for any cracks or broken seals.
J

[richw]

Re: KWA/KSC/ASG Glock not always locking back

Thanks for the advice people.

I've re-found this thread http://www.airsoftretreat.com/forums...?topic=98823.0 and it appears that my mag catch is worn and allows the mag to drop slightly, if I push the mag up it locks back every single time!

[jakeas]

Re: KWA/KSC/ASG Glock not always locking back

and theres your gas inefficiency!

[dave38x]

Re: KWA/KSC/ASG Glock not always locking back

Huzzah! Time for a five dollar real steel glock mag catch!

[meddy]

Re: KWA/KSC/ASG Glock not always locking back

Huzzah! Time for a five dollar real steel glock mag catch!

i actuly might bother to look for them as i need to replace ten of the damn things

[Joe_Kenton]

Re: KWA/KSC/ASG Glock not always locking back

i actuly might bother to look for them as i need to replace ten of the damn things

If you find a good one pm where you found it!

[meddy]

Re: KWA/KSC/ASG Glock not always locking back

Not sure if rock your glock posts to the uk it should as some parts are not restricted but not orders yet XD