The Present Arms MP-1D Single Stack Magazine Post is made of a tough polymer it will not mar or scratch your firearm. It is designed to work interchangeably with any of Present Arms' firearm workstations. Fits Sig Sauer P225 9mm, Sig Sauer P226 22, Sig Sauer P229 22, Sig Sauer P290 380ACP, Sig Sauer P290 9mm, Sig Sauer P938 380ACP, Sig Sauer P938 9mm, Springfield Armory EMP 9mm, Springfield Armory EMP 40S&W Mfg: Present Arms Inc