Magical Mystery tour: common reasons for KSC GLOCKs cycling problems
 

Hello all,

since I'm getting cycling problems with my Glock 26, and because I've been swapping a lot of parts, I'd like to know what are the most common causes for pistol-related cycling problems (as opposed to magazine-related problems)

from reading aroud, I understand that a cycling problem is often caused by:



thank you!

The SINGLE MOST COMMON cause of ALL GBB problems?

Too cold.

People often forget that one, haha.

Cracked hammer sear (part #87 I think on KSC?) will cause the hammer to sit about 1mm higher when cocked, and it either prevents or slows the slide from cycling.

limp wrist?

ok ,
and when the action chambers another round but the hammer doesn't lock in cocked position, what's happening mechanically ?

Then the sear is broken.

ah, how so?
thx !

Just a bit more info* on part #87 it used to be part #83 so if your KSC glock is as old as mine your manual will say 83 but it is the same part.

The rocket valve (part #24 for KSC) breaking will also cause failure to cycle/blowback properly. and they do like to snap in half.

*Not sure how useful this info is as there seems to be less and less old glocks and old glock owners out there now.

The hammer has a little spur on it that latches with the sear. If that spur has broken off or gotten worn down to the point it won't latch, the hammer won't sit in the cocked position. Other side, if the 'hook' on the sear has broken off, then it won't latch with the spur on the hammer. So it's a case of either/or, just a matter of finding out which one.

ok , but would the hammer stay cocked if you cocked it by hand (with or witouht the slide mounted) and the sear was broken?

yes it will but the hammer will stick up anywhere from 1mm to half cocked.

If the sear was broken it'd stay in the full forward (firing) position, meaning there was nothing to hold it in the cocked position. If it was cracked but intact, it'd sit like the pic Tex posted above.

Part #87/83 is completely snapped in half in that pic.

Must be the old type you referenced before. I've never seen one with a broken #87 that would stay down in the cocked position.

I hate to pipe in here with an issue, but I figure it's on-topic and lots of glock experts will be on this thread, but basically: my new (from classifieds :P) KSC Glock 18c won't cycle back properly. It blows back fine, but 90% of the time won't cycle back properly, getting stuck somewhere in the middle, and venting out all the gas. At first I thought it had to do with the loading nozzle, since it seems like it's a pretty tight fit, and won't spring back smoothly, but now I'm thinking the slide itself may also be involved. Any suggestions? I cleaned it out, checked the parts, it all looks fine, but there's something going on here.

Thanks again, and mods please move if this isn't the right spot.

have you tried with the magazine empty (no BB just gas) (and a finger on the slide catch to keep it cycling) ?
does it cycle properly?

to all: what would a [ proper cycling with empty mag / no cycling with BBs] mean ?

I've been having the same issue with both my G19s, still haven't tracked it down (and I've had them apart dozens of times in the past for various reasons, they just decided to stop working at one point....... mind you, they have both seen over 10,000 rounds).

Does it have a metal slide or just the stock one?

Mystery GBB problems are a Pain. this has been an issue with your 19's for some time now hasn't it. Too bad I'm in BC I'd offer a second pair of eyes/hands.

as for fixing a non working 18c what you do is take a large piece of paper write down all the part #'s on it then throw a dart start there repeat till fixed. grumble grumble F'ing 18c's

Empty mag firing has the same issue. I want to say that it happens less, but I'd just be kidding myself I think.

I've been fixing Glocks for years, and some of the problems are annoying. But the last batch (mine) have been worse. I actually have three G19s, one is KWA that was given to me since it was unfixable, so I took all three, reduced to a pile of parts, and used the best parts for one gun. Got one working great for a few mags at home, and at the game when I needed it, first shot the slide didn't go into battery and I spewed gas. I gave up after that, bought a fully upgraded FMK KSC Mk23 and love it (have a previous moel I used lots too). And for a reliable compact pistol for my drop leg.......... Crosman C11 NBB. Lol, over powered, but reliable.

it's crazy, I'm getting exactly the same kind of non-logical problems with mine too.

now listen to this:
I was getting a low output with a Hi-capa magazine on which a replaced the lip.
Knowing the gun works well, I got fed up with the mag and decided to 'up' the output by unscrewing the output valve as much as I could before leakage.
I got one turn, that must put the valve a fraction of a millimeter higher, and it did the job: the mag now works.

So now I'm going to try that whenever I get not enough output - probably adding a little teflon tape on the beginning of the threading, which will allow the valve to sit a little higher, in order to get more 'hit' from the hammer.
edit: just tried on one G26 mag, didn't work, doing more tests now :)

more:
it's funny because yesterday my Glock was working perfectly with all the magazines, after I swapped all the internals for others and then back to original.
The things I changed from the original G26 are:
-metal slide
-the springs and rods for heavier slides just fucked the whole thing up and now it's back to stock
-high flow rocket valve (apparently has no effect whatsoever)
-high flow valves on 6 magazines, the seventh with original valve developping exactly the same recoil and working better than with a high flow.

after testing ,re-testing where everything was fine, it sat overnight in its case, magazines were refilled this morning just in case, and re-tested: half of them don't work properly and I get the 'chambered but not cocked' effect again.
Of course all internals are fine.
The hammer bar is a bit loose, even swapped with a brand new one...

so after fiddling a little bit more, I got to the conclusion that the proper tool to make a KSC working properly is a Gandalf

http://1.bp.blogspot.com/_OU9gW7W3rl...00/Gandalf.jpg

or if he's not available, probably a Mandrake can do:
http://acidtestdjs.files.wordpress.c...ian-comic1.jpg

something I found out with my Glock 32c, is that when that was happening its either a part was not oil'ed correctly after it was cleaned, or something was jammed. Buy some silicone spray, this gets in everywhere like wd40, but it is designed for airsoft guns. oil all the moving parts including the slide. once everything is oil, strip clean it and begin again. if this doesnt work... then ask someone who knows its better then me....

So I've decided to post here because I'm at a loss. I'm almost positive the issue with my KSC Glock 18c is the loading nozzle, I can see it getting stuck, and I want to do something about it. However, I can't for the life of me figure out how to detail strip the bloody slide. I took the screw out of the BBU, but I can't figure out how to get the fire selector or the back plate off. Google has offered me nothing, so I came here :(

Remove the rear sight, there is a small set screw under there that holds the selector switch in place.

Yeah, I kept looking on Youtube and the like and I eventually found a set of good disassembly vids, although the presenter is a complete douchehat. So my loading nozzle springs are wonky at each end, and I think I'll have to sand the BBU to get it sit/cycle properly. It's a shame, too, because I always disliked glocks before this, but I find the ergonomics and design to be a real dream. Everything's close to my firing hand, it's light, no corners or bits to snag on gear..... ah well, at least I have a good project gun.

I love my Glocks for the same reasons.

The nozzle springs are a pain in the ass, always getting bent at one end, and is a royal pain to seat properly, because you see they go in right, and find out later they got bent again somehow.

yeah it's awesome that the glock's got this shape and desing, it goes smoothly when you want to draw it fast to throw it in the next garbage bin. I wonder if they're recyclable...

Yesterday I took it to the game ( in a cold and damp place), the pistol that worked semi-fine at home wen pfrl-prooot-pchhhh on each and every magazines :(

I'm going to revert all the valves to low flow - it will probably change nothing :D
...

...thats what she said...