Why do bore up cylinder kits come with ported cylinders?

Asomodai

AF-UK patch owner
Joined
Jun 14, 2017
Messages
3,140
Reaction score
1,048
Hello all. 

I was looking into improving the compression of my JG SL8. It has a 509mm barrel. 

Some people say that you get a little percentage increase in FPS with a bore up kit, but you need a 509mm barrel or more to take advantage of it. However most bore up kits I see have a ported cylinder, which you usually wouldn't use with a barrel over 400mm. 

So what gives? Why have a bore up kit with a ported cylinder?

I would like to purchase the Guarder G36 bore up kit, but the cylinder is ported. 

 
Last edited by a moderator:
Back
Top