okay can someone please explain to me exactly how these work?
the bore is the same all the way down the barrel or so i have heard? so what are the different backs for?
it sounds really confusing but im guessing its extremely simple
cheers in advance
mac
The 'fronts' have a thread about 8/10th's of the way down the barrels. They screw into the 'back' using this thread but the 'front' extends all the way to the back of the 'back'. This then screws into your marker.
If you change marker, you just need to change the back and keep all your fronts.
Will take some pics in a minute as I know this description isn't really clear!
Edit: Pictures uploaded.
Also yes, single bore all the way down the barrel. I got a kit with an AC threaded back, .685, .689 and .693 'fronts' from Slothball