I don't have my billet lower yet, so I really don't know much about it. But I thought I might have read something about re-locating some pin or something. That being said, do you guy's think the PWS will work on a 16" middy. Has anyone tried one of these.

The only reason I like it is because the flute's would match my barrel.

Make sure to scroll down and read the instruction's. I think it may not work because of the ST captured rear take down pin. Unless there was a work around for it.

http://primaryweapons.com/store/pc/viewPrd.asp?idproduct=139&idcategory=21#details

Should be able to push down the pin far enough to rotate the tube to the proper depth.