I ordered a scope for my S&W M&P 15-22 but it came with a scope mount for a carry handle. It is a NcSTAR 1" Scope Mount Model # MAR9 (
NcSTAR Scope Mount - AR15 / M16 Mount / 1" Insert-short MAR9. MAR9. NcSTAR Riflescope Mounts, Rings & Bases.). I am asking for $10 + shipping, or I would be willing to trade for a set of 1/2" or 1" scope mount for a flat top or even a 1/2" rail riser.
I can send you pictures of it if you would like, but I figured the picture on the link above would do.
Danny