Up for sale is a beautiful AA S510 that is Huma regulated with a walnut stock, gun has no issues holds air perfectly! She will shoot an Average of 876fps with ES of 9 and a SD of 2 over 30 shots from a 200 bar fill , i have shot up to 40 with JSB 14.35 gr pellets! Will ship with 2 magazine's, fill probe, scope, and donnyfl moderator! Only flaw there are 2 pressure marks on the stock by the pistol grip. Asking 650.00 obo shipped in the US contact me through pm on this site! Thank You