Hello all,
I have had my Tm mp5 for a few months. I bought it used with a cracked gearbox (cheap).
I have since rebuilt this into a new case with uprated piston,bearings M100 spring, correct ported cylinder etc etc.
It now fires at a nice consistent 340 fps.
It's never seemed to fire in a very consistent or straight line and the range is very poor.
I have now replaced the hop chamber wit a new tm one, also a new firefly rubber and zci tightbore.
Still has the same issue though which is confusing as pretty much everything's been changed....
Also tried with various brand .2 bb's
Any advice would ne welcome as I am most confusalled.