I was asked about my method for getting open hands for Guard models, in particular for using 3rd party weapons, so I thought I would do it properly
For my Guard I've pretty much exclusively used Hasslefree
CAD guns and you get very few open hands in the Cadian box as the hands are moulded to the lasguns, so the following method is how I fixed up my guys:
Starting off with a random lasgun. There are a few different styles of lasgun arm, but I'm not sure if it makes much of a difference to the hand.
Slice off the gun just in front of and behind the hand.
Use a small drill bit to bore a hole through the remaining lasgun stock. You want to use a larger bit to widen the hole in the next stage, so just think for a moment where you want the bit to go in relation to what will end up being the palm of the hand (and drill carefully).
Then use the larger bit through the pilot hole.
Now carefully slice the sides of the lasgun foregrip using the drilled hole as a guide.
And you'll end up with a pretty rough open hand with small flecks of fore-grip still attached. Use a sharp knife to carefully trim the edges away until you get to the hand itself.
You might also want to trim or file the palm and fingers a bit to fit your chosen weapons.
and an example with a random P-90 I had kicking about.
The only downside is that you waste a lasgun for each of these hands, but if you're replacing the gun anyway it shouldn't really matter. Maybe keep the muzzles for other uses, such as sights or suchlike.
Hope this is useful and please share your results!
And some more examples when painted: