[Blackthorne]

I am working on a gun and it seems the main problem is the nozzle isn't moving deep enough into the hop up unit to block BB properly in the cycle and it's causing double feeds, and sometimes will even let the whole mag spool out.

Before I tear the mechbox down I started to wonder on if the wrong nozzle had been installed by mistake by the previous owner.

I have researched and found that nozzles are gun (not mechbox version) specific, but there isn't anything in the stickies that outline what nozzle is for what, or what the dimensions are.

It's and M4, with what I think is a G&P metal hopup unit. I have taken the upper off and can see that the hopup is not stopping the nozzle short, or interfering in any way. The hopup when installed is seated tightly to the mechbox, with no gaps or play. But the nozzle cannot be observed when looking into the magwell.


QUESTION 1 : Anyone here have an M4 nozzle they can measure for me so I can see if this is one from another gun? Or can someone link me to the data?

QUESTION 2 : I am pretty sure the nozzle simply isn't long enough. But is there something else (like gear timing) that could stop the nozzle from traveling fully forward?

Thanks In Advance!

BT