G&G cm 16 shorty upgrade gone wrong! bucking+compression mod

Discussion in 'Gun Building, Modifications & Repairs' started by plasticnoob, Jun 8, 2015.

  1. plasticnoob

    plasticnoob Active Member

    hidden city
    so I just upgraded

    cylinder head
    bucking and nub

    factory compression = 0%

    new compression = 0%

    I stretched out the oring and I had 100% compression on the new one, the factory compression was 70% + leaking air as I was pushing.

    Going to buy a new piston head w/ the o-ring

    The bucking I am not so sure about this is what is happening, the bucking is a lonex 70 degree

    I installed it put FULL hop up (normally when I shoot full hop up I can shoot out to 75-100 feet then it just curves for the sky.

    The new bucking+ nub on full hop up stops around 30 feet and just drops off, sometimes double feeds and it just doesnt move at all.

    what have I done :( ?

    Will be doing more mods, motor and spring + new cylinder head + barrel as on full auto it just sprays left and right.
    Last edited: Jun 8, 2015
  2. Jeranhound

    Jeranhound Active Member

    Sounds almost like you didn't put in the new nub that came with your bucking. I actually did the same thing the first time I put my AK back together, but its hopup is so sensitive that works the same whether the nub is there or not, I just need to move it a tiny bit more.

  3. plasticnoob

    plasticnoob Active Member

    hidden city
    The nub is in, the old one had some tatter mark on it, and worked good for waht it was, prehaps I should put the old bucking and nub in to test.,

    be back in 40 minutes :/
  4. plasticnoob

    plasticnoob Active Member

    hidden city
    okay quicker than I thought

    old bucking+nub = great!

    not sure what to do with this new lonex + nub, guess ill save it for another gun that might work with it?

    Hop up nub is a bit bigger on the lonex 70 so I am staying with the G&G factory nub

    gained about 30 feet with the new compression mod!!!!!!!!!!!!!!!!!!!!!!!! I was hitting 150 feet target but the barrel isnt the best, ened to upgrade that. full auto spray is terrible and single fire isnt much better.

    I was using .25 at that! last time I used .25 I was hitting 115-125 max feet
    Last edited: Jun 9, 2015
  5. kronus14

    kronus14 New Member

    Quezon City
    The Lonex 70% hop bucking is for high rated springs..

    eventhough your using, for an example a sp170, you still need to break in the hop bucking.. 500-1000 rounds will do the trick.. just like the prometheus red hop bucking..