Well... since Scum Tactical were so bloody rude to me over their barrel, I'm sending the bloody thing back. I told him I'd made modifications to it and they still said return it. Fine. Getting a refund. Will go elsewhere for another outer barrel.
New O rings with a tweny bit of lube on it should narrow it down to whether it is or not. In my experience, short may it be I had an old Co2 mag that would leak for a short time after inserting the bulb. A new O ring fixed it. It was the original mag that came with it and hadn't had much pressure on the valve so the O ring degraded.
Hope this helps. As above, an actual expert is on his way....
I've looked at these but it's the noise of the velcro that's putting me off. I originally bought some viper ones off Amazon but sent them back after seeing a YouTube video on UMP pouches in extended mag pouches (the taco type; in image). I have emailed a couple of shops on ebay who say that they'll fit but I'm just double checking with someone on here before I commit to buying.
Good point. Basics is what I should be looking at before I start looking at going deeper. As I don't have any experience or know what teching is 😐