G&G Polymer 105rd Mid-Cap Magazine for M4 / M16 Series Airsoft AEG Rifles (Color: Translucent)

"These are G&G 105rd GR16 magazines.
At the top, front to back measure ~63.8mm, left to right measure ~22.75mm.
Mag catch slot is ~7.90mm from top of mag, ~10mm wide, and ~6.75mm tall.
Feed tube is ~9.2mm in diameter, ~4.9mm above top of mag, and inside of tube is ~4.6mm from front of mag.
~ accuracy is - 20um.
Comes with stickers depicting 5.56 ammo for the sides of the inner magazine. With the stickers on, you can still see the bbs and/or follower from the front of the mag.
Bottom plate lock is easy on the finger tips, and inner magazine insertion/removal is smooth.
Outer shell does not seem to be as strong as the inner magazine.
Feeds well in my gun, but I'm not a high ROF kind of guy.
Aside from the relative free mag load of bbs every 26 loads; the last round follower prevents bbs from getting lodged in the mag well/receiver areas when removing the mag while the gun is not in firing orientation.

"First of all, these mags are great. They fit in almost anything and feed every bb. I have an EMG Helios Sr16 and it fit and feeds no problem. There is a video on YouTube by US Airsoft that tests and reviews the mag. My only gripe is the mag capacity, 105 rounds not 250 like Evike say. Over all I really recommend this mag in both variants especially for $12.