Sure... the gun just rocks back and forth when using the bipod, just like if you were holding it yourself. I'm guessing the reports of a "tripod" were wrong and it was just these forearm mounted bipods. They don't stop recoil, they just stabilize the elevation.
I'm not an expert, but from the pictures it looks like the first rifle has a 308/7.62 mag next to it (probably a standard 25-rounder). The other pic is clearly a bump stock and what I at first thought was a 60-round double-wide mag. Someone said it's a 100-rd Surefire mag, but I've seen those and I recall them being a little bigger. If this guy really wanted he could have picked up some 150 round drum mags, but I've heard they're a little unreliable... the springs in them don't hold tension the whole way and you'll probably get a failure-to-feed (FTF) at some point.
60 round mags are probably the most that make sense if you're concerned about reliability, for that same reason. More than that and you're better off with a belt-fed weapon but those are terribly uncommon and besides a few wacky contraptions involving a total rework of the lower, not something you'll see outside the military.
The bump fire makes sense though since it's about as close to full auto as you can get and still be legal (because it's still one trigger pull per round sent downrange). And you just know they'll come after those... ignore whatever else comes out of this, bump stocks will be banned.
Full auto, or "rapid fire" in this case, never made much sense to me unless your goal is a combat-related suppressive fire strategy (keep the enemies heads down). Control is terrible since your'e fighting muzzle rise so it's really about the spray-and-pray jihadi technique, which unfortunately is all this guy cared about anyway.
I'm also afraid this will be an impetus for going after the standard capacity magazines (30 round 5.56, maybe even 25-rd .308). Not to mention the higher 40+ round mags or the large drums.
Which is ridiculous because any practiced shooter can drop the mag and reload in no time at all. We're not talking about world record times like you'll see some folks do, but within a second or two and you're back in battery, locked and loaded.
Which all begs the question... was this a false flag by the gun grabbers?
> false flag by the gun grabbers?
As you imply, he needed nothing beyond 10-round magazines, and no mods of any kind, to do massive, horrendous damage.
Slide stocks are even harder to control than real full auto. Obviously he was not aiming.
Had he aimed at all, and used nothing but normal firing, he easily could have murdered more people.
He didn’t even need anything like a modern magazine; he only needed something that accepts clips.
The failure was in providing ZERO security capable of addressing ANY sniper, then the unbelievable delay in getting to him.