Hef Legend

perfect, cheers

Look for the TDC mod, details can be found on Airsoft Sniper forum, basically glue a nut to press down directly on to the hop arm. The hop arm due to its configuration can twist slightly applying uneven pressure on the bb giving the normal hop effect with a diagonal axis sending shots sideways consistently. Relatively easy to do if you can hold your nerve as you drill the outer barrel.

I was tempted to just grab an AA chamber, used them in my last few builds. But from what I've been reading a standard hop tuned well will still perform.