I'll soon get my modded 183 series back, it will be a kinda mini CAR, in fact is wearing the 51/2 inch CAR hider. Have the Butler Creek stock but am thinking about switching to Choate. Want to use an MS3 sling and the Choate has a swivel while the B.C. has to have something threaded in wherever you can. Does anyone know if the folder on the Choate has a metal loop inside that plastic stock? It looks more bulky in pics, is it? Anyone use this gadget or have any pics of theirs? Any good images or advice would be helpful. Thanks.