I recently picked up a great selection of backpacks from Secret Weapon Miniatures and thought I'd share them here. There's three types up for grabs; the small backpacks, large backpacks, and communications backpack. To boot, it would seem all of these packs on sale right now too!
Compared to some Imperial Guard packs
If you've got a miniature needing a backpack, this is the way to go. The ruggedness of the packs lends itself across multiple genres and could be pulled off anywhere from WWII, to modern, to futuristic. Here's one of the communication packs next to one of the outlandish Cadian comm packs.
They're all white metal and arrived with very little mold lines needing hardly any clean up at all. The larger backpack is my favorite by far, and the one I plan on using the most of. The smaller "daypacks" are pretty cool as well, and with a little knife work, the comm-pack could double regular, slimmer pack.
Here's a look at all of the packs
I used some to outfit my Sons of Minos Space Marines
As you can see, the packs hold their own even on beefy troops
I should mention that Secret Weapon has more than just backpacks. Their main forté lies in custom bases. You can see one of them here on my Storm Wardens Veteran. They also have other nifty bits like Roman-style crests for helmet conversions, weathering pigments, and cool basing materials to name just a few.