I broke my 1 week old mk4 ptp. am sharing my exp to all of you so none of you will do the same mistake. (or for you to laugh)
I was testing if all my 5 mag still have gas inside but I wanted to cover loud firing noise. So I placed my ptp flat on bed and pressed a pillow above like sandwich. I then dry-fired my 5 empty mag in this fashion. No problem for first four mag. I only noticed there was a large amount of gas blow backward when I was dry-firing. When I dry-fired my last mag I saw a black thing burst out from the slide bullet shell hole. I picked up the black thing from floor and noticed it is a broken front bit of the cylinder (part #7 according to the mk4 ptp part diagram). Also see attached photos.
I suspect the cylinder front bit was exploded due to the large amount of recoil-gas-power (do not know this is a right term to describe). And this was obviously caused by my pillow that was blocking all the firing-gas-power at the barrel front. Please correct me if I am wrong.
I really leant a lesson. May be KWA in future can add a warning line in the ptp manual saying something like blocking the barrel front even when dry-firing will damage your gun? Do not get me wrong am not blaming KWA. I just want to make sure no more idiot will follow my mistake.
two questions for KWA experts:
1) when will KWA restock the #7 part? I saw your proshop saying it is out of stock.
2) is this usual ? or just my bad luck – I mean dry-firing 5 times with a pillow blocking the barrel front will explode the ns2? FYI this is my first time dry-firing with pillow covered and pretty sure is my last time.