I just registered here and was about to ask for help on the same topic Tanner posted. So thanks.
I got a TM G17 with a PGC metal slide which was made cycling so smooth like a dream. Yet I can not get out more shots from my TM magazines than 10. So I need to replace the magazine catch and my magazines, too. I am glad there is a solution and sad it will cost much.
Perhaps a valve replacement could solve the problem of the TM magazines?
Gas leaking during refilment is easily solvable by placing O rings in the inlet valve. TM GBB magazines do not have that on stock. 90% of other makers do place an O ring into their magazines.
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