The Boltgun, also commonly referred to as the Bolter, is the standard weapon of the Adeptus Astartes and Adepta Sororitas. A .75 caliber weapon, the boltgun works similarly to a grenade launcher firing a relatively small explosive; an initial ballistic charge launches the bolt in the same way as with an autogun, after which the explosive, commonly called a 'bolt', is self-propelled. Once it penetrates its target, it explodes. Finely hand-crafted in Space Marine or Adeptus Mechanicus forges, Boltguns are heavy, sturdy weapons with a powerful recoil normal humans would find difficult to handle.

This is the first in a series (or possibly a pilot for a big composite model, we'll see) of upgrades for some of mine (and other people's) WH40K models.

Of course, if you want to give Elmo or Big Bird a bolter, I can't stop you...