FX Impact M4 - Huma Air High Flow Dual Transfer Port

[ReneR]

Hi, for my M4 with Superior Heavy STX 800 mm in .22cal I would like to know which version of this https://huma-air.com/fx-impact-high-flow-v2-dual-hole-transfer-port-set-with-slug-and-pellet-probe/ with or without barrel attachment I need to order.
TIA

 

[Doc_pafumo]

Hi, for my M4 with Superior Heavy STX 800 mm in .22cal I would like to know which version of this https://huma-air.com/fx-impact-high-flow-v2-dual-hole-transfer-port-set-with-slug-and-pellet-probe/ with or without barrel attachment I need to order.
TIA

Hi, ReneR. I don't recommend that dual transfer port for Huma... I had some trouble removing and replacing the barrel when I installed it.

 

[ReneR]

Hi, ReneR. I don't recommend that dual transfer port for Huma... I had some trouble removing and replacing the barrel when I installed it.

Thank you for sharing your experience!. I would still like to try, as I would send it back, if it doesn't fit. I will also get the first and second stage regulutors, hammerstrings,...
Coming back to my above question. Do you have an idea of what I need to order?

 

[Doc_pafumo]

You need the barrel attachment too

 

[ReneR]

You need the barrel attachment too

Thank you! I'll report back when I've installed all things together with the 42,3 grains ZAN ELR. That'll be fun, I hope ;-)

 

[Ries]

You need it. I have it on my Impact and Wildcat.

The dual port from FX is too small, in combination with a pin probe I gained 20 fps.

When you do this, remove the liner from the barrel sleeve, so you can clamp the barrel sleeve in a vice with soft grips and use a little bit of heat to loosen the original transferport

 

[coastal drifter]

Back in the day before all these parts were available, we would Dremel our own transfer ports. made them oval so the pellets would slide across without damage. Worked well on the Impact M1 .25