This is a metal sector clip by ZCI, it attaches to most airsoft AEGs sector gears. This little clip essentially, holds the tappet plate back for a longer period time and engages the tappet plate in a smoother manor to help permit better feeding. If your AEG does not feed a BB every cycle, or has feeding problems than this is the piece for you.
Item No: ZCCL35
Vendor No: ZCCL-35