1/35 50 Cal

What do you mean by "duels pistol grip (aircraft style)"?  All vehicle/ground mount M2HB .50 cals come with what is called a spade grip, the two handed grip with bars (see below).  They are not "aircraft style" at all.  

Aircraft M2 .50 cals have an aircooling jacket over the barrel.

What type are you looking for?  There are a few options out there.  You can find both types in

either AFV Club's or Academy's .50 cal MG sets.  Both are really nice.

Thanks Gino, I was thing M60 when discussing the grip; as always you are on top of this.  It is the M2 handles as in your pictures I am looking for.  To be mounted as a crew served weapon on a UH-1D. Only need one.

Tamiya makes a set of small arms that includes the M60 and M2, miight have what you need.  I know our Hobby Lobby carries them for around 7 bucks.