KWA K120 120rd Polymer Midcap Magazine for M4 / M16 Series Airsoft AEG Rifles (Color: Black / Set of 6)

"Very Durable magazines but if you run a high ROF and hevier bbs after several months they will not feed properly i bought two boxes almost all of them have a weak spring. the spring is very weak to begin with they are thin cooper so after several months you start getting miss fires.

"I bought these mags and the quality is great and feels amazing for polymer. Only downside is the would not feed into the combat machine mod 0. I just wish the fed into my AEG