KWA / KSC MP7 Aluminum Bolt - ESD

Must be use original #23 24 25 27 28 29 31 when assembling
Before pushing bolt into frame that need to keep hammer pull down and valve knocker locker (original #82) press down.If fires before pushing bolt into frame that have to pull hammer down and press valve knocker-locker down again, or bolt will stuck in half stroke.
When operating, need to pull and push charging handle quickly.
Please DO NOT install ESD Steel Efficient Air Flow Kit on this bolt carrier, or nozzle will broke.