The KWA KM4 Upper Receiver Top Rail assembly is a replacement optics mount rail for the KWA electric M4 AEG. The upper rail can become bent or loose by over-tight application of out-of-spec optics, or by serious impact to a mounted scope.
KWA KM4 Part 226A is a drop-in replacement rail to repair any damaged KWA M4.
KWA KM4 Top Rail Assembly Part 226A Features:
-OEM Fit and Finish
-Repair loose upper receiver rail