Quote:
Originally Posted by Fab
Hi,
I just got my brand new KJ M4 3 weeks ago (my firts GBBR but I'm used of assembling/modifying AEGs), after reading many forums, I installed the usual recommended by experienced GBBR users
Craddle velocity reducer
Cradle Piston
RA_Tech 6.01 380mm tightborre
I saw the video on youtube for installing the Cradle velocity reducer, everything went smoothly but after passing the M4 on the chrony I'm really disapointed...the fps are totally inconsistent !
with 1 small spacer + the o-ring, on the .25 (chrony set for 0.25g BBs ) it ranges from 325 to 420 with sometimes a few shots around 390fps but still really really inconsistent....same thing with 0.20g
I checked the velocity reducer many times, changed the spacers, checked that nothing was loose, well lubricated (not too much), cleaned the hop-up but still the same thing...after firing around 20~30 mags I'm really disapointed....any suggestion of what I did wrong ?
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I would go to .28's or .30's ,I get better consistency on the chrono
and really good range.
I also did the "top down" hop up mod on two of mine. WOW I like
Are you using propane? No oil ? that's what mine like.