Hi guys:
Looking to add an air cooled machine gun shroud to a barrel on my Tac One project. I know the front of the body extends over the barrel for "some" distance, but how far?

Basically trying to decide the barrel length and shroud length needed for a good fit.

The lapco shrouds are sized based on the typical barrel length they are mated to:

8" inch shroud is actually 6 3/4"

12" shroud is actually 10 1/4"

14" shroud is actually 12 1/4"

18" shroud is actually 16 1/4"