Barrel Set Cocker Threaded Still Wanted

[Hawkins]

I have a completely sh*t " tiller " barrel kit... looks beautifull but its ported to buggery so you get 400 shots from a 3k .8l bottle. It has 4 fronts 3 backs and is chrome backs with a black to chrome front...

 

[wings]

what size are the backs?

 

[Hawkins]

6.87, 6.90, 6.93

http://www.pbreview.com/products/reviews/3232/

picture 48

see the porting all the way down the front peice... horrible barrels