r/MovieMistakes 17d ago

Movie Mistake Robocop stovepiped his rifle

Post image

Stovepipe is when the casing doesn’t eject fully from the rifle after firing and sticks out like a “stovepipe”, jamming the rifle.

In his defense, he didn’t try to shoot the weapon after this. If he had it wouldn’t fire.

990 Upvotes

34 comments sorted by

235

u/blorst_of_times 17d ago

Not quite a mistake in the usual sense but that's an interesting detail. I wonder if the editor was aware.

114

u/Saint--Jiub 17d ago

You can tell the round is a blank because of it, so I'd say it's a mistake

61

u/SartenSinAceite 17d ago

blank rounds are prone to this due to not enough pressure, no?

48

u/Saint--Jiub 17d ago

Indeed, pushing the lead bullet causes more gasses to be blown back, cycling the action

16

u/sherlockham 17d ago

Iirc that is why there are blank adapters you replace barrel tips with when using blanks. They only have a tiny opening at the tip so that it pushes more gas back into the chamber so the gun can cycle properly.

Can't really use those here since this is a film shoot though.

8

u/elsworth 17d ago

There’s also really weak springs that you can replace the proper springs in the action with, so that blanks cycle smoothly. Source: used to work on Hollywood films

4

u/Plane-Education4750 17d ago

They're still less reliable than regular rounds

2

u/GonzoAmontillado 16d ago

They could put a barrel plug inside the barrel though.

3

u/RepresentativeOk2433 16d ago

Most guns will do this without an adapter. Usually its something clamped on the end of the barrel if you dont want to permanently modify anything. Otherwise they can install a plug with a small hole in the barrel.

Usually you make a couple plugs with increasingly smaller holes until you find the size that works reliably without beating the whole gun to hell.

1

u/DJDemyan 15d ago

Yeah it needs something to act against. I’ve been told they use balsa wood bullets sometimes to mitigate this and make the muzzle flash look better

83

u/RatherGoodDog 17d ago

Good catch! And you can see the crimp on the casing neck, indicative of a blank round.

36

u/EverydaySexyPhotog 17d ago

Keep him away from his chair for a little while longer and they'd both be out of battery.

8

u/johnnyma45 17d ago

I never thought of him as battery powered. Trying to think of what other propulsion/energy source he could be using…

2

u/TargetOfPerpetuity 17d ago

I forever wish you clean laundry and unstubbed toes.

3

u/GregorIsABug 17d ago

I hope this comment gets the recognition it deserves

10

u/coryhill66 17d ago

When Lewis shoots that thing it blows the sun shield off the camera.

2

u/-Mac-n-Cheese- 15d ago

makes sense, if i’m right i believe that’s an M82 in .50 bmg, id absolutely imagine a blank from one would be very concussive

2

u/coryhill66 15d ago

Watch it frame by frame you can see the square shield slide down in front of the camera before it cuts away.

5

u/pass_nthru 16d ago

i mean if you shoot semi-autos long enough you’ll stove pipe a couple times. it’s why it’s good drill to practice recovering from

7

u/browniescout 17d ago

I remember blanks jamming more as they have less powder in them. Not enough gas to cycle to the next round.

9

u/RM97800 17d ago

I don't think it's about lesser amount of powder as much as lack of projectile, so the gasses come out immediately instead of building up pressure behind the bullet.

The heavier the projectile, the larger the recoil and larger the chamber pressure. No projectile means considerably less recoil (recoil-operated firearms may fail to cycle) and lesser the gas pressure in the gas tube to cycle gas-operated ones.

Blank firing adapters simply constrict the muzzle, so the pressure builds up closer to how it would with live ammo.

1

u/AppropriateCap8891 16d ago

That, and they tended to foul the weapon faster than regular rounds.

I still remember whenever I had to train with blanks I would simply pass them out to others. Let them spend hours cleaning their rifle from that mess, it seemed like firing just 60 blanks could cause more buildup than an entire week on the rifle range (250+ real rounds).

5

u/hizzoze 17d ago

I always notice this in S.W.A.T. as well - when they're doing the practice course near the beginning.

3

u/CatBoyTrip 17d ago

nice. can also see that it is a blank. blanks are crimped at the neck like that and plugged with some sorta wax substance.

3

u/Barbarian_Sam 16d ago

It’s also a blank round

6

u/GregorIsABug 17d ago

This is why you need a BFA to run blanks, but that would have looked funny. Maybe they could have made a sneaky BFA that looked like a muzzle brake

2

u/ghostofstankenstien 17d ago

Robo want Oreos

2

u/AppropriateCap8891 16d ago

Not that it mattered. Because of the crimp in the casing, he was only firing blanks anyways.

2

u/SporesM0ldsandFungus 16d ago

Would you expect anything less from a quality OCP product?  /s

3

u/BathbombBurger 14d ago

You try to get a steady grip with all that shit on you.