Jason,
If you are lucky, you may avoid the dreaded HW30S galling issues.
The below is a photo of my brand new 0.177" HW30S, with no shots through it by me.
You can see the galling caused by the cocking arm knuckle on the cylinder, and the two divots (arrowed) are where the cocking arm knuckle rests on the breech block.
The cocking arm foot also gauged the sides of the cocking slot.
The spring was badly S-shaped, and the piston seal burnt and torn. This was all from the test shots at the Factory
I remediated all the scuffs, put two (2) ptfe blocks in the cocking arm to act as bearings, fitted a Vortek PG2 kits, lubed properly (Krytox GPL105 oil & 205 grease), and the HW30S now shoots superbly
A shame it wasn't fit for purpose from the Factory
Have fun & a good weekend
Best regards
Russ