I just received my 9 round magazine from Sharp Shooter Supply for my 10FCP-HS center-feed. It looks like a regular magazine with a machined aluminum extension. It is very well made and seems to cycle the rounds through well. The fourth round down does rattle probably because of the slight flare of the original sheet metal where it meets the machined housing.

I saw on the Savage website a new Law Enforcement model 10 BAS & BAT in .308. These come with 10 round magazines. Will the magazines fit the 10FCP?