Ok, firstly. I just shot my rifle until all the air dumped out at 50BAR or so - dumping the air is ESSENTIAL. You can't remove the cylinder without doing so in any case.

Secondly, yes you need to take off all the gubbins at the front - charging adaptor etc. The cylinder is just that. A long tube threaded at both ends

Thirdly:
clicky
Mmm, onions

Muzzle break, bolt, muzzle end, scope mounts all stripped and polished. Cylinder and barrel re-blued in a matte finish (going for the tactical look).