Ron, I found the M21 Hog images on the web sites of the aformentioned units and are the result of hundreds of hours of surfing the net and checking thousands of images of Hueys. Intriguingly, there seems to be a pattern concerning the really unusual Vietnam Hueys-usually You will find just one or a couple of images of a particular bird that will, by default, be missing some crucial information (like tail number, or they will show just one side of the bird, etc.)-isn't that frustrating or what!?!... But I guess that's when one's detective and analytical skills come to play, but sometimes it's just pure luck :) As for Your second question-am I a VN vet or a son of a VN vet: that's a double negative Ron. I am too Young to be a VN vet and was born in a wrong part of the world to be a son of one. I live in Slovenia, Europe (where I was also born) and have no ties to the Vietnam war apart from my obvious interest in vietnam-era choppers. So, my only source of VN chopper-related images, manuals, documents, etc. is the ''almighty web'' :)
Jon, I wish You all the best in Your new LZ! Man, it just dawned on me that You wrote the excellent ''US Army AH-1 Cobra Units in Vietnam''. Great book!
Here are a couple more pics of UH-1Cs with Heavy M21:
First an image of Maverick 33 of the 175th AHC patrolling the Delta in 1968. It carried nose art honoring the french brew that was available across RVN, that is the famous ''Biere 33 Export''. If You look closely, You will notice the flex ammo chute feeding the right-hand minigun. Note that the aircraft is wearing the late-style yellow-tipped tail rotor scheme, but is missing the engine intake filter screen.
Now, this is a very poor resolution image, but both, flex miniguns and 19-shooters are clearly visible in this shot of Cobra VIII, aka. the Liquidator; She was a UH-1C of the 114th AHC gunship platoon at Vinh long in 1967-68 timeframe.
And the last of the M21 Hogs: a left-hand ''Heavy M21'' combo an a Thunderbird UH-1C of the 336th AHC at Soc Trang.
More to come....