check gander mountain.. then have a form fitting mesh/lycra ? tshirt / muscle shirt.. and it has a velcrom pocket 'shoulder holster pocket' under each arm. my buddy picked one up.. he has a kel tec P3AT and you could not tell he was carring it.. just looking at him in the shirt.. put a 'real' shirt over it and you could get away with a medium+ frame SAI have a .38 Special Derringer. I have searched for a shoulder rig and can't seem to find any thing. The inside the pants holster is kinda bulky. Any ideas?