Another video with Tim McMurray of Mac 1 airguns. In this video Tim discusses barrel length vs valve volume and why 13 inches was his choice for the Annihilator.
And find Mac 1 online at:
http://www.mac1airgunshop.com
Find this post on facebook at:
https://www.facebook.com/photo.php?fbid=441752542585393
Find Dan on google Plus at here
