How I base gun and team weapons - Bolt Action

I start by cutting out of hard plastic sheet I buy from Menards for about $30.  On of these plastic sheets can last me about 30 bases.

Now I apply a thin coat of air dry clay on the bases covering it to the edges.

Now I press all the guns/miniatures into the clay to the top of their bases to make the bases even with the clay.

Now I let the clay dry.  The clay will crack and shrink a little.  After it does that, I remove the clay carefully and use PVA glue to re-attach the clay to the base.