A&K 1500 Round Box Magazine with Upgraded High Strength Motor for Airsoft M249 Series AEG (Color: Tan)

"Love it. Never jams, always feeds, small and lightweight easy to carry multiple

"I'll update later if needed, but
For mine at least, if you want to run this with a lipo, I used a 7.4 V 450 mAh battery, and for whatever reason, the mag just wound like crazy. and it wouldn't stop. I have some NiMH batteries that I'm going to try, and I hope they work, but on the other hand, the mag runs incredibly well aside from the battery issues, and it has no issue feeding 30 rps. because I was dumb and just ran the gun when it was winding like crazy when the lipo was plugged in. But I'll update further after game day with the actual battery it came with.

"For the most part I love this mag. I have never had feeding issues and it is very fast. The downside that I have found is that the battery is very poor it does not hold a charge for very long and if not unplugged from the mag for extended periods of time it drains to the point of no return. Since the batteries are proprietary it’s damn near impossible to find a solid replacement without building your own or getting a different battery that doesn’t fit right.

"I am surprised that a&k is selling this box mag considering how underdeveloped it feels.

The material of the sack is cheap and rips easily.

The pressure switch male connector, barely sits inside the female receiver on the box mag, and has to be constantly pushed in, or else it will fall out and not work.

The bb feed part of the mag still needs to be pushed in the magwell before you can sit the box into the bottom of the gun.
I am very disappointed in this product and the company.