Matrix 50 Round Polymer Magazine for M4 Golden Eagle GBB Gas Blowback Rifles

"Got two during the Airsoftcon sale for my GE Block 3 Gbbr. And they run great and hold gas great and not to bad of a cooldown effect. 5/5

"Nice mags been working good so far. Works on both my Ghk gbbr

"Good mag the only thing is if you actually want to use it, you have to change the o ring to a thicker one. That's the only reason why it leaks.

"Bought these for my Matrix M4 gbbr, short version is so they work yes. Effectively no. I received one broken and one working ran around 150 bbs into it and the valve already started leaking. Asking for a replacement to see if it’s just the shipping that messed it up.

"Fits and functions but all three had leaks and needed o ring replacement/greasing before they would hold. The QA is off on the torque. All were really overtightened. One was leaking from the release valve and was so over tight that my valve tool stripped right through the brass trying to remove the valve to replace the o ring, rendering that magazine useless as I can't remove the leaking valve now at all. When there is nothing else available, these will work - but you better have backup o rings and be comfortable repairing leaks.

"Evike, please don't remove an honest review. I posted a review on this months ago and now it's gone.

Honest review:
These mags are terrible. They leak out of the box from the output and fill valves. You're better off with GHK GMAGs which will work both in your Golden Eagle and GHK GBBRs.