Hi,
I'm not sure if Archer do 1 / 16 th scale decals.I take it as you mentioned the German machine gunner that it's a figure your doing.I have had a quick browse and I can't find 1/ 16 th scale decals anywhere.It's an unusual scale.
Verlinden do 2 sets of 1 / 15th scale decals for German figures.One is decal I'm not sure whether dry / water slide and they also do a photo-etch set of medals,badges,insignia.
Hope this helps.
Simon