gisburn20 Posted May 19, 2007 Report Share Posted May 19, 2007 Having recently rebuilt several aging KSC/KWA glocks , I thought I'd pass on a little trick I found , seems that when the rails on the body and/or the slide wear away to a certain point you get that old " fires one shot then dumps all the gas" problem, changing over the slides between guns can help ( if say one gun has worn rails on the lower only etc.) but I found that if you take out the blowback unit and put a strip or 2 of duct tape on the top , when you refit it to the gun it can space the blowback unit just low enough to get it running again. you need to experiment with layers of tape , on one G26 it only needed 1 layer of duct tape whilst on a really worn G19 it needed 2 layers , too much tape and the slide will jam , not enough and it still dumps the gas, also seems to eliminate the problem with not fully cocking the hammer ( example : slide goes back fully BUT goes full auto briefly OR gun fires as soon as the trigger safety moves - both can give the same "dumps all the gas in the mag " problem. This might not fix everything , but it only takes about a minute to try and costs nothing , well maybe the price of 2 inches of duct tape/ electrical tape. Hope this helps someone. (and if you have any spare DEAD glocks I always need spares !) Jim Link to post Share on other sites
fathom1001 Posted May 19, 2007 Report Share Posted May 19, 2007 Hmm, well my G19's far from ageing yet, but this might well be useful in the future... Link to post Share on other sites
hkssr20det Posted May 20, 2007 Report Share Posted May 20, 2007 Hmm, well my G19's far from ageing yet, but this might well be useful in the future... <{POST_SNAPBACK}> I actually use this same trick when fitting metal slides to Glocks. It is useful even on a stock gun, to be sure the blowback chamber matches the rails on the slide for smooth operation and the best match to the mag. Link to post Share on other sites
Sale Posted May 24, 2007 Report Share Posted May 24, 2007 I've used shims, but tape should be just as good. Another trick is to change the mag catch every now and then. -Sale Link to post Share on other sites
junior Posted May 25, 2007 Report Share Posted May 25, 2007 I've had to use this trick when fitting a G&P G17 slide. The blow back unit sat so low that even with the screw tightened all the way, the BBU was still loose. I needed 3 strips of electrical tape to get it even. Works like a charm now... Link to post Share on other sites
Wege Posted May 30, 2007 Report Share Posted May 30, 2007 I've used shims, but tape should be just as good. Another trick is to change the mag catch every now and then. -Sale <{POST_SNAPBACK}> agreed. This fixes quite a few issues.. Link to post Share on other sites
tayside hotshot Posted August 12, 2007 Report Share Posted August 12, 2007 can i ask whats the blowback unit :$ Link to post Share on other sites
Sale Posted August 12, 2007 Report Share Posted August 12, 2007 It's the big lump of metal inside the rear of the slide. Link to post Share on other sites
tayside hotshot Posted August 12, 2007 Report Share Posted August 12, 2007 ok the rails that are in line with the blowback are slightly lower than the rails on the rest of the slide ( forward from the blowback unit) so i put some tape on the blowback rail only ? to make it level with the rail on the slide ? Link to post Share on other sites
Stealthbomber Posted August 12, 2007 Report Share Posted August 12, 2007 I tried this when using chinese metal slides on my Glocks. Because they're lower quality they seem to cause problems sometimes. Be warned that you need to fit a shim (paper, tape, whatever) in front of AND behind the screw that secures the blowback chamber into the slide. If you only fit a shim in front of the screw it'll pivot upwards when you tighten the screw. To keep everything lined up properly you need a shim in front of AND behind the screw. Link to post Share on other sites
tayside hotshot Posted August 12, 2007 Report Share Posted August 12, 2007 I tried this when using chinese metal slides on my Glocks. Because they're lower quality they seem to cause problems sometimes. Be warned that you need to fit a shim (paper, tape, whatever) in front of AND behind the screw that secures the blowback chamber into the slide. If you only fit a shim in front of the screw it'll pivot upwards when you tighten the screw. To keep everything lined up properly you need a shim in front of AND behind the screw. <{POST_SNAPBACK}> so the tape has to be put on the rails both sides of that screw ? ok doke! heres not much rail at the bacn end of the slide ( screw) but ill put it there to keep it all even Link to post Share on other sites
Sale Posted August 12, 2007 Report Share Posted August 12, 2007 No tape or anything on the rails. Full stop. What Stealthbomber meant is that if you put a layer of tape inside the slide to make the blowback mechanism ride lower, you should apply a layer behind the rear sight as well. A shim directly where the screw is works as well. -Sale Link to post Share on other sites
clintonwelding1 Posted October 3, 2007 Report Share Posted October 3, 2007 thank you so much, just saved my glock : )...got worrired i was going to have to find a new baby : (. Link to post Share on other sites
friendlybombers Posted October 3, 2007 Report Share Posted October 3, 2007 Great tips! Hopefully I'll remember this when I have to use it! Link to post Share on other sites
greg Posted October 3, 2007 Report Share Posted October 3, 2007 Super tip. Does it cure the old 'pull the trigger to get full auto until the mag is empty'? Greg. Link to post Share on other sites
Sale Posted October 3, 2007 Report Share Posted October 3, 2007 Greg: Yes, this trick helps the hammer to be caught by the sear more reliably. -Sale Link to post Share on other sites
felix4536 Posted October 9, 2007 Report Share Posted October 9, 2007 great tips!! just what i needed, since im fixing my old g17 Link to post Share on other sites
ertgunner Posted October 9, 2007 Report Share Posted October 9, 2007 interesting ... this may work on others as well ... thanks for the new idea Link to post Share on other sites
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