Fox Outdoor Products Tactical Quad Stack Magazine Pouch - Durable MOLLE Compatible Accessory for AR-15, AK-47 & Rifle Magazines | Perfect for Hunting, Range Training & Tactical Missions

At first use it is very, very tight. Product is well made and the stitching is nice. It's fairly adjustable. When I let my mags sit in their fully loaded for a while, it loosened up and has now a nice snug fit with good ease of use. I would very much recommend this product.I'm not entirely sure if M4 style airsoft mags are different than poly standard 30 round mags but these will barely accept real world M4 mags. I did eventually get them in with WAY too much tugging and pressing. But once I got the mags in, you could not pull them out! It took two people pulling in opposite directions to get the mags out, hardly useful for a real world application. As far as the four pistol magas in front, again, same issue. I don't know what template they used for these pouches but not for a double stacked .45 mag, my partner's double stacked 9mm barely fit as well and same problem as the M4 mags, you could not draw them out. Bottom line, don't buy.missing velcro strapsYou have to stretch the pockets for 20 mags, however, I have one set of mags that go in easily, another set that will require more stretching. The base on one set is bigger than the other set because different manufacturer; one set has quick release that has a larger base. My .45 10 clip mags easily fit in quite nicely. But, if you have 15 or more you may not be able to close the tabs. But, you may not need them either as they all will fit firmly. Very nice but be prepared to work on and with it. It would be best if this was made 1/2" bigger on the 20 mag pockets and most anything should fit easily.