sentences:  The high-end PAC1511MS has a solid swamp ash body, with a Seymour Duncan humbucker neck pickup, and a Seymour Duncan "hot-rails" humbucker pickup in the bridge position, and a non-vibrato bridge with strings passing through the body.The entry level version of this Mike Stern signature model Pacifica is the PAC311MS.Both are Telecaster-style guitars similar in shape, but in the case of the PAC311MS controls are slanted rather than on a chrome plate parallel to the strings and the M stands for Maple (neck) and the S for Singlecut as there also was a PAC311S with a rosewood neck.