The Ruger PC Carbine Magazine well insert is designed to fit in the magazine well of the Ruger PC carbine. The magazine well insert will allow for the use of Ruger SR9/Ruger Security 9 9mm Luger Magazines. The flush fit design of the magazine well insert will pair well with your Ruger PC carbine. The insert is made from rugged glass filled polymer material for the ultimate in strength and durability. Installation is quick and easy and this genuine Ruger factory part is made right here in the USA.