[867V309]

The Paris attack involved automatic rifles using magazines, for example, not a belt fed machine gun.

I'm no expert, but a Tommy Gun drum is 50 round capacity, and I'm not aware of a higher capacity commercial civilian rifle.

I couldn't really count, but I'd bet there were 2 bursts of more than 50 rounds in this attack.

[SaveFerris]

There are 90 and 100 round for AR-15 / AK-47, etc.

[Spktyr]

There are 100, 150 and 200 round drums for the AR platform rifles and drums as high as 75 for the major 7.62 NATO rifles. Ex-Soviet rifles could have 75 or 150 round drums.

This didn’t sound like an automatic rifle and the long pauses don’t lend themselves to a drum reload either.