filling FWB 500
The cylinder should be removed to refill, it "should" be hand tight unless done up by a Gorilla, if it has, and is very tight it should need no more than a grip material to remove it with a firm hand.
You will need a compressed air fill bottle, and the correct FWB fill adapter. Fit the cylinder to the bottle by hand pressure, Do not exceed 200 bar on filling, remove and refit to the rifle only by hand.
If you do not have a manual, you can get it on line on www.Feinwerkbau.de
Take care and have Fun
Robin
Walther KK500 Alutec expert special - Barnard .223 "wilde" in a Walther KK500 Alutec stock, mmm...tasty!! - Keppeler 6 mmBR with Walther grip and wood! I may be a Walther-phile?