Which cylinder i need

[junkie123]

Hello guys, like you have seen in my previous post i wanna to upgrade my internal parts.
So i dont understand which cylinder i need for barrel 380mm,have some company like shs they writing types on there cylinders, and every type for other length of barrels.
And have the gurader they not write types
So i dont know what i need.

[Sitting Duck]

Re: Which cylinder i need

Type 1 has slits in the back - might be a smidge over volume but nothing too major

Type 2 should have port about 4/5ths back and be correct
However the actual dimensions do vary a bit and each company may label them different

Your port should start about 53mm from front of cylinder
(38 for 380mm plus 15mm for a cylinder head with corrected AoE, yeah reckon 53mm is about right and does work out OK except for very small 110-141 mp5k barrels)