all of these 53s & 54s [moose, trappers,muskrats, stocks & stock whitts are the same size4 & 1/8]. the blade & spring metal stock is the standard heavy gec.all the gecs i've seen all flat ground with the exception of the sabre profile of some tooth models.actually the flat ground is the best using profile [ i.m.o.] however the sabre profile is slightly stronger & of course to my self very attractive. utility use however does favor the flat grind.at this time all my carry-users are stag ,bone & wood. formites have reported the acrylic does acquire some surface blemish but the blemishs are minor.