Thought the junior ali cylinder will fit will it not ? as they are advertised on German websites for the AR20's
Link - http://www.sportwaffen-schneider.de/...ducts_id/24762
The LG300 Walther pistol grips and cheek pieces will also fit...
As for the second hand value they were only £600 new ! although BAR have / had one on their site s/h for £440 and it's been partialy modded ( no shroud)...
It's just my opinion anyway, and these guns will always have their detracors.
I'm happy with mine.