WA blowback problems

[HGI]

Ok I think I know what the problem is but it may be something differnt.
I beleieve all I need is a replacement O ring.

Here's what happens... The slide gose all the way back but dosnt return all the way forwards..

I have a flow reducer and 150% hammer spring installed... The rest of the parts are stock.

I have this gun:Western Arms S.C.W./ Wilson GILDED V12



Now Part# 1 dosnt slide freely in and out of Part# 2. I cleaned and relubed it with Silicone lube and still no luck. It feels as the O-ring is to big and makes me wonder.. is it possable for propain to make a O-ring expand? I also have a big game on the 27th of this month so I'm hopping if anyone know's where I could get a replacement O ring befor that.



Thanks for any help

[JAVP]

yes, after the use of propane/green gas, the o-ring Part-88 will expend.

[MadMax]

I found that the oring will expand with too much silicone oil. I have several WA GBBs which have not shown the same problem, but I am pretty careful about not overlubing my GBBs. The 5" Xcellerator which I got over 15k firing cycles on didn't have the same oring problem and I only lubed once every bottle of propane (~2.5k shots).

[Maelstrom]

i haven't experienced this either, i had recently taken apart my blowback and didn't see any expansion on that o-ring. also I had soaked the o-ring in silicon oil for about 30mins and placed it back in. a bit better seal and I can feel more kick, but it didn't lock up.

[HGI]

Anyone know who might have these O-rings in stock in Canada so I could get them befor next weekend?