Attention all newcomers to the Foam Smithing forums:
Before posting a new topic asking about "How do i build _____?", please check the following links to see if the weapon you are wanting to build is already listed for construction advice.
How-to-Build Weapons on the BelegarthWiki
Eriador Weapons Construction Page
Experimental Weapons FAQ, also on the BelegarthWiki, for weapons that are out-of-the-ordinary
After you have examined all three pages, then, by all means, ask any questions that remain unanswered.