UAC is a renowned local manufacturer in Hong Kong that specializes in producing aftermarket parts for Tokyo Marui products, the all new Match Grade Steel Hammer Set for TM M4A1 MWS GBB series is fully CNC-ed from Carbon steel and finished with a black titanium coating. This upgrade would provide an adjustable hammer lock to tune for a crispy trigger pull and preventing locking in semi automatic fire.

Item includes: hammer, hammer lock, hammer plate, sear x2 and trigger lever.

Lubricant is needed for all steel parts in order to smooth the mechanical operation but also to prevent getting rusty. Frequent maintenance with lubrication can keep the parts in good condition. ** Socket set screw require low strength thread lock glue to set.