Could i put a dye ultralite barrel back and halo wdp angel 1 front together.?

[buggy]

just wondering if you can mixmatch barrel types? also does the bore size only depend on the back piece if it is a 2 piece barrel? Paintballers i need help!

 

[Paintballcow.com]

No they will not fit together.
Yes the bore is determined in the back piece.