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What size do you recommend? Currently, I have 4.75mm and they are way too big. I'm looking to use these on the arms of my Devastator squad to switch out weapons (lascannon, missile launcher, etc).

Thanks!

While not Dev specific, I’ve been using 2mm magnets for SM arm mounts.

But considering all the bits needed for the heavy weapons, I’d just pick up some more torsos and legs and make more whole marines.

I used 3 mm x 1 mm on my marine arms. I did the same thing just made the five marines and magnetized the weapons so they could be swapped out.

I just put the magnets at the should joints, and glued the arms to the weapons they went with. I also used magnets on the back packs since each weapons has a different pack. Since I did it that way, I am able to use them as standard marines as well, if I don't need Devastators.