5.56mm 56 round and 100 round Magazines

[jimmyj]

I was at an indoor range with a gun shop and the manager was displaying a "Black Rifle" selective fire weapon.
Magazines were 56 rounds and 100 rounds. The magazines appeared to not be longer than a normal 30 round magazine. The manager explained that the magazines had dividers that held rows of cartridges. I didn't enquired the make of the weapon as I was not involved in the conversion. When the weapon was fired in the range on automatic it was one long burst. I was impressed.

 

[serger]

don't know the gun but the mag was probably a Sureline

 

[Golddollar]

Did it come with a crane?

 

[inspcalahan]

Surefire makes (made?) some 60rd and 100rd magazines that looked very similar to the standard 30rd aluminum magazines. The 60rd mags were the same length if I recall correctly, just wider. The 100rd mags were a bit longer.

I have a few and while I haven't used them in a while, I do remember them working remarkably well for what they were. The best 100rd magazines are still the Beta drums but, they are much larger, a bit more involved with loading and take little maintenance if you actually use them.