Hi i recently purchased a WE GBBR M4 and i was wondering wut are some tips on maintenance and tips on using the gun i.e. filling the gas into the clip i have had problems i think with the filling of the clips sometimes the gas fills and sometimes it doesn't but im always doing the same thing i hold it for about 10 to 15 seconds ands sometimes it runs out after 3 to 4 shots or sometimes after two clips any help would be great thanks.
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