The Dragon 1/35 UH-1D model does not have an M2 .50 cal MG in it. It has 2 M60 7.62mm MGs, one is an M60D with spade grips and the other an M60A with standard buttstock and pistol grip. The M60D was the standard and most common weapon found on Hueys. .50 cals were rarely seen on them.
The Dragon M60s are very well molded and probably the best in plastic available. The weapons layout in the kit is incorrect though. Dragon only has one M23 doorgun mount, there should be two (one for each side). For it to be correct, you would need to either get another Dragon Vietnam Helicopter crew set for the other M23 mount, or Cobra Company has an aftermarket resin set that has the two M23 gun mounts.
If you just have to have a .50 cal, Academy makes a great set of them in plastic that are really nice and pretty reasonably priced. Beware though, the .50 cal mount for Hueys was very different than what comes in the Dragon kit.
Academy MG set.
Here are a few other pointers on the 1/35 Dragon UH-1D/H kit:
The Dragon/Panda UH-1D/H/N kits are not that bad overall. The kits are pretty good, but need quite a bit of work to get them to come out looking great. The details are soft and sparse in the interior. The other issue is that there are parts for many different versions of Hueys in the box and the instructions don't show which to use for which version. You have to know what you are building and which parts to use. The over-sized rivets are taken care of with a light overall sanding to knock them down a bit too.
The rotor blade is not correct in the Vietnam UH-1D/H version though. The issue is the spine running the full length of the blade. It is actually a 212 (UH-1N) blade. The D/H blade doesn't have this feature. It is easy to fix though, as below. I have heard that is has been corrected in the UH-1D HEER version.
The top one has been corrected. The middle is how it comes in the kit. The bottom one has the area to be removed in red.
I also recommend the Cobra Company Interior and Drive Train upgrade sets for it. They will really spice it up and make it look great. I have used the interior set on both of mine. It just depends on how much money you want to spend on it.
Here are a couple helpful threads too: UH-1D and H model differences. Dragon UH-1D in-box Review.
Lastly, the decals aren't totally accurate in the kit. If you are looking for an accurately marked helo, check out the Huey decal sets from Fireball Modelworks; Vietnam Slick Decals and FlatIron MedEvac Decals.
Hope that helps
Gino P. Quintiliani - Field Artillery - The KING of BATTLE!!!
Check out my Gallery: https://app.photobucket.com/u/HeavyArty
"People sleep peaceably in their beds at night only because rough men stand ready to do violence on their behalf." -- George Orwell