King Arms U.S. M1 CARBINE Forward Optic Mount

King Arms U.S. M1 CARBINE Forward Optic Mount CNC Aluminum Construction 20mm Picatinny Rails Design For Attach on The Upper Handguard Of The M1 Carbine Suitable For King Arms M1 Carbine Gas Blow Back GBB Rifle Airsoft Guns Also fit for Marushin M1 carbine Airsoft Gas Blow Back GBBR Rifle (Wood Version)