FX FX Streamline Barrel re-assembly Question

[explosive]

Hi everyone! I have a quick question that might sound a bit silly. I recently removed the barrel from my Streamline for a thorough cleaning, and now I'm putting it back together. How should I position the hole at the back of the barrel, the one located between the o-rings? I assume that's the transfer port (apologies if I’m mistaken). Should that hole face directly upward or downward toward the air cylinder when reassembling the barrel?

 

[Trucker3573]

Transfer port goes downward.

 

[Gerry52]

Yes, transfer port, downward. I'd also suggest that when you slide barrel back in that you have a magazine in place in the breech. It's the very end of the brass piece (last 1/16" - 1/8") that holds the magazine in place (by sliding into groove on backside of mag). Don't want it wobbly but don't want it too tight either.

 

[explosive]

Thank you all for your help and the great tips. I really appreciate it!