Qd Adapter manufacturer / supplier in China, offering Large Diameter M-Lok Handguard 7" 10" 12" 15" 17" Free Float Ar15 Handguard Rail Fits. 223/0.556, Tactical Universal 13 Slots Picatinny Rail Section Compatible of Both Keymod & M-Lok Rail System, Tactical Handguard 17" Mlok Hand Guard Large Diameter Free Float Fits. 223/5.56 Rifles and so on.