power drop off

[andy oliver]

help.

i changed spring today , now every 5 - 10 rounds but totally random get almost total drop of of power, range goes to like 10 foot ,rest are 100% any ideas ?

king arms m4a1 aeg non blow

thanks

 

[Hudson]

Could be an issue with the tappet plate.

I had a Beta Spetsnaz that did the exact same thing; once I replaced the TP, it went back to normal.