Rost Martin RM1S 9mm 10rd Extended Baseplate Magazine

The same 10rd steel magazine as the flush RM1S unit, fitted with an extended baseplate in place of the standard one. Capacity does not change. What changes is grip length, since the added base gives your little finger somewhere to land and steadies a slim frame under recoil.

Shooters with larger hands usually run one of these in the gun and keep the flush magazines as spares, which is the normal split on a carry pistol. Steel body, polymer baseplate, black throughout, and it drops free clean. It fits the RM1S only, not the wider RM1C or RM1F magazine wells.