Matrix 50 Round Magazine for M4 M16 Golden Eagle Western Arms King Arms GBB Gas Blowback Rifles

"Does not fit a G&P WOC, its compatible but its just 0.5mm to wide to properly fit into the magazine well. It took pulling with two hands to get it back out.

"I would like to say that this magazine is perfectly fine when it works but lacks features that other expensive magazines like the GHK ones offer. Compared to the GHK it has less gas capacity as well as a lower overall quality. Depending on the temperature you should be able to get a full mag worth of shots but don't expect any more. These mags have issues with cooldown and seem to get cold relatively quickly. This magazine is also difficult to reload and requires a specific speedloader adapter. To be honest, I got one of these magazines out of a boneyard Golden Eagle GBBR that had leaking issues for the bottom seal. So I do not know exactly how long the seals would last from a brand-new magazine. What I can say about this magazine is that it is a nightmare to do maintenance on.

In total, there are 4 potential points for the magazine to leak; some worse than others. As stated above the first seal to go on mine was the bottom o-ring. Unfortunately for me, this o-ring is one of the only proprietary o-rings that come with this mag. If the bottom o-ring on your mag fails, good luck finding another o-ring because they don't sell the correct o-ring here on the website. You may see the King Arms o-ring set and think "Oh but the king arms o-ring set will fit, right" Nope! The King Arms seals are all proprietary for the King Arms magazine except the smallest o-ring. Among other complaints, the inlet valve on the back is a nuisance to change and the whole magazine is held together by like 8 pins that all need aggressive hammering to disassemble. To give you an idea about how annoying it is to disassemble this magazine, G&P literally released a $120 installation jig years ago that holds pressure on the magazine so you can hammer in the pins. I wish I was kidding about this, look it up for yourself (WA M4 magazine installation kit).

In all honestly, I don't think I can recommend this magazine because of the quality and potential maintenance that would need to be done on this magazine. If you need M4 magazines for your Golden Eagle M4 GBBR spend exactly $25.95 more on a better G.2 magazine (wink wink) and save yourself the trouble and headache if you plan to run this GBBR platform long-term.

"The mags are made amazing and feel great, however they can't hold enough green gas to shoot all 50 rounds. I get about 20 shots before the mag starts to run out

"Magazine works fine in the rifle but I have yet to find an easy way to reload - no speedloaders have worked yet and evike was no help at all on that front. At this point I’m relegated to hand loading each bb in one at a time.

"Recieved My GBB today, I bought an extra magazine with it. Neither mag will hold the gas. I can get about 20 rounds through them before they flake off and one of them looks used. The mag cannot provide full auto burst. It flakes off even faster. This doesnt reflect on the GBB it self. I think the quality is great but the mags REALLY SUCK!!
I will need to call envike to see what solution that they can offer. This is no good if I can only get 20 rounds through it.

"After seeing no review on this I decided to wing it and buy a couple I�m glad I did but I also regret it. One mag worked one mag didn�t but I�m glad that one did since the one the s&t M4 Ris came with didn�t work so as of now I only got one mag but I wouldn�t deter you from purchasing a magazine or two of this brand. Sorry if you actually read this but to sum it up
PROS:
Affordable for a GBBR mag
Nice weight
Does as intended and makes gun shoot
CONS:
%50 success rate
Can�t handle full auto or it�ll run out of gas but why are you firing full auto with a gas gun in the first place?

Over all would I buy another mag from s&t? Yes if I�m optimistic, I�m still checking if the G&P ones function in the gun yet but so far these are your only option and one last thing they may be a little stiff putting in the first time it�s normal.

"I've gotten 9 of these and 5 right off the bat blew there seals instantly on the first few bbs shot

"I do not recommend all my mags came broken or simply didn't work big sad

"I ordered 2 of these and when I put gas in them one of them immediately started leaking, very upset about it and will not be buying another one of these

"Bought a couple of these. They leak WAY too easily. I'm not in the means or desire to rebuild one every time they start leaking. To cost this much, I should RARELY ever have a problem with it. Got one in. Tested it at home. Made sure I ran all the gas out of it with my GBB at home. Got to the field 3 days later. Went to fill it up. Gas started leaking. Thought it was just a fluke. Same thing happened to the 2nd one. Don't buy one.

"It leaks right out of the box.

"DO NOT BUY THIS MAGAZINE.

I like many of you who are reading this review. Was new to the GBBR scene. As I looked for GBBR magazines for the WA system, I noticed they were all out of stock... Except for this one. I ignored my gut and purchased the magazine. Purchasing this magazine was the worst purchasing decision I have ever made. The magazine would hold gas and BB's... Until it didnt.... While I could fill the magazine, It would sporadically purge itself from all the green gas while I was shooting with it. After about 3 magazines worth of BB's, the bolt catch stopped catching the bolt. The stock magazine worked fine. Just this one, would not hold the bolt open on the last shot. There is a reason this magazine is in stock. Because people who are familiar with the GBBR scene, know not to purchase it. Follow their lead and look elsewhere.