Yes, checked it and called. The MVP LC takes the LR/SR spec'd magazine. It does not accept the M1A - which is the link you provided to me - magazine. Checkmate confirmed that the MVP LC does not list compatibility with the M1A platform. According to Mossberg, they know of no 15-round magazines...
Recoil Pad & Magazine
Re: Mossberg MVP LC 18 308 stock model ...
> Is there a Recoil Pad than anyone knows of that would fit this unit?
> Are there any 15-round magazines for this unit.