UAC is a Hong Kong brand that specifies in the production of competition modification parts for airsoft guns, and due to the popularity of the TM M4 MWS series, they have introduced the Enlarged bolt stop, Enlarged Ambi-Magazine Catch, Ambi-Selector and a Race Trigger. All of the items are constructed with aluminium so they would be light weight and durable.

Ambi Mag Release ? A normal right button and enlarged left release button with non-slip pattern allow you to release the magazine on both side, which is a perfect solution for any competition or tactical application. Changeable right release button and more style is coming.