PTS Enhanced Polymer Magazine For LM4 and PTS Masada (Color: Black)

"Good mag and gets the job done.

"These magazines are great when it comes to efficiency and does not leak at all but you must be careful, when you release the bolt on the masada it tends to shave the semi top part of mag follower but only when there are no bbs in the mag because the tip of the loading nozzle is metal I believe and the mag follower is plastic. Even though happened to mine luckily the gun feeds normally as it should, and loading the bbs into the mag is normal as it should, as matter of fact everything seems to be in a working order. But heed my warning

"These are very beautiful mags and more gas efficient than the KWA LM4 magazines, although they only the EPM mags hold 38 rounds as opposed to 40 rounds, but I think that is worth the trade off. Unfortunately there are a few flaws with these mags, the knocker on top where you load your BBs is made of plastic, it is made of a very strong plastic, but if it does break, the mag will be rendered useless, and hopefully PTS will help you out by sending you the spare parts. Also, the spring inside the mag is very strong, making it a bit difficult to load BBs the first time, and with such a strong spring there is a feeding problem. I've had BBs split in half from these mags, but the problem solves itself after using the mag a second time when the spring starts to loosen up. After that, it will feed better and be easier to load. Don't get me wrong these are good mags, just don't expect them to be perfect the first time using them
If you are using a LM4 GBBR, these mags are a nice upgrade if you are looking for more gas efficiency, but if you are like me and have the PTS Masada GBBR, theses mags match beautifully with the gun.

"I have owned 3 of these magazines for about 2 years now and they worked great, didn’t leak, just worked. These magazines have a few flaws though, first off, I had the feed lips snap on me. Finally, the biggest one are the screws on the side of the reservoir. These screws either backed out on me or the threads completely stripped on me over time Boeing used. Not sure if I got a bad batch or something but I had this happen to all of my mags which has made them now useless.

"As cool as these mags are they have their issues. First thing you’ll notice is the weight. Its heavy even by gbbr standards. Second is it leaks from time to time. Third is dissassebly could have been done better. These mags have got a way to go to justify their price.

"+ These are great looking mags and the base plate is excellent when pulling the magazine from a pouch.

- I had sigificant issues with accuracy with these magazines. The issue seemed to be caused by the feed lip molding issues. Once I took some sand paper and a file to the feed lips the issues werent as noticable though there were still issues. Switching to the standard magazines resolved all issues. Ive read a few other reviews from users who also had similar issues. Im thinking it was just a Quality Control issue.

Also a negative with these magazines are that they hold only 38bbs and are noticeably heavier than the standard magazines.