Get in...Covert 16".
Actually really like it (expensive mistake if I didn't... )
Temp 4x ACOG scope, hop-up's junk and has to go. Installed a W.A.S.P piston, Thumb stop on foregrip and a 2 point qd sling.
I did get a more powerful spring (110 newton) and it brings it upto 491fps with a steel sleeve on the cylinder and full air brake but it's really tough to cock so I'll look at getting another spring with a lighter pull but still keeping the fps up. Swapped the mag feeder for the dogs dick, comes with one in the box so it's just lazy they don't preinstall it. Air seals are good; did the finger over barrel test and the piston held it's ground till release. I'll ad a suppressor and print some custom baffles shortly.
Then probably get the rattle cans going... I'm a happy chappy overall. Thanks for the help.