The mutant does not have the anti double loading feature. Only Veterans do.I wouldn't mind 11 shot versions of these in both .177 and .22. The 12th round is solid so that you can't cock it and try to kill something with a "poof!" of air. ( you know you've all done this too . . . lol ) The guns already have anti-double loading. A stop notifier on the mag to let you know / remind you that you're out of ammo. C'mon man . . . ;-)
. . . of course you'd have to position it right when loading in a full mag so that it starts at "shot #1" . . .