Where and how you play will dictate your needs on clothing
For your cylinder I will assume that you currently have a ‘standard’ aluminium 3000psi compressed air HPA cylinder
You obviously need the right cylinder type for the available fills … and that it is suitable for your DSR
Here in the UK CO2 remains common on many ‘rental’ sites, but 3000psi fills are normal for sites that cater for walkons, events, own gunners etc
Major tournaments and events will generally also offer 4500psi fills for players with suitable cylinders
A ‘standard’ 3000psi aluminium is heavier than the equivalent 4500psi fibre cylinder, but the ‘standard’ 4500 is bigger which brings the weight closer, so avoid just switching cylinders and do some investigation to what suits you
The ergonomics of your combined cylinder and gun are much more important than weight, if it feels right and is balanced the difference in weight is less noticeable
For reference see the attached pictures which are my (out of date) 4500psi 48ci fibre cylinder, which has the same capacity as a standard aluminium 3000psi, but is a little shorter & fatter and has the ability to have more air when 4500 is available
This weighs 1 kilo itself, and a bit more with a cover (which you should fibres)
(There are also ‘ultra light’ cylinders where the weight saving is much more obvious)
The following video gives a good overview of the ranges of cylinder types