How a Pump Shotgun Works

A 3D animation showing how a Remington 870 pump-action shotgun works. Cinema 4D was used to create each individual part, as well as animating everything. Substance Painter was used to create the wood stock and fore-end textures. Corona renderer was used for final output of lighting and textures.

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Special thanks to Grant Inouye for his help in creating the initial fire explosion inside the shotgun shell!

Chapters:
0:00 Intro
0:26 Ammunition Loading
0:57 Shell Carrier
1:13 Shell Latches
1:47 Bolt Locking
1:57 Firing Sequence
2:17 Shotgun Shell Anatomy
2:33 Shot Propulsion
2:51 Extraction & Ejection
3:10 Hammer / Trigger Reset
3:41 Credits

These animations take considerable time and resources to make, often taking 6+ months to produce. Redistribution of my 3D animations is not permitted without first contacting me for instructions and options.

[JW-zxdr]

Every time I watch the inner workings of firearms I’m always blown away at the fact that someone was clever enough to design their mechanisms.

[dang]

The mechanical engineering behind shotguns is staggeringly impressive.

[smugbowkid]

Seriously, you see guns all the time, and even more “simple” guns like shotguns are WAY more complicated than expected.

[irohnic]

2:35 “He could be you. He could be me. He could even be-“

[JaredOwen]

Nobody does gun animations better than Matt! Thanks for sharing

[MrMairu]

Working in CAD design myself, I have a massive appreciation for the effort required producing these videos. I wish I had the time to do something similar with some of my designs! Superb!

[Sir_Uncle_Ned]

It must have taken hundreds of attempts minimum to get this mechanism to work and then to streamline it for mass production. I love engineering stuff like this!

[Interdictiondeltawing]

Kokushibo: nobody could defeat me

The double Barreled shotgun: 2:35

[carterskindle]

This is one of the coolest animations I've ever seen. Even compared to other "how guns work" animations this one is just the best in the way you explain everything. Also when you showed the powder igniting the fire (well, hot gasses) leaving the barrel looked awesome.

[oldfarmer]

As simple as a shotgun is, it is still quite a complicated machine. The remmington 870 is such a durable thing that you could use it for a canoe paddle if you needed to. I trust my express to be reliable enough to help me harvest deer every year.

[Angelfyre.]

Fun fact older shotguns such as the Ithaca 37 and Winchester 1897 did not have a trigger disconnect meaning as long as you held down the trigger, the next shell would immediately be fired when put into battery. This was and still is called Slam Fire. It was a quick and devastating method of emptying the tube at close ranges especially in the trenches of WW1 and Vietnam

[Rheyndraziel]

The engineering behind the shotgun is pure elegance .

[shiekhwaleedmiral-protein]

When the world needed him the most, he came back...

[hopeourfallen]

I spent 6 years working on weapons in the Army...and THIS was hands down the BEST training vid I've seen.. THIS would have saved us a ton of headache in AIT♥️ GREAT VID♥️♥️♥️

[DiddlyDoink]

the mechanics of guns have fascinated me for years, especially when you consider that they were made by really clever people basically as an upgrade from just throwing rocks and spears at each other, like someone had to without any prior knowledge or really guiding help, had to work out so much of it

[polturdgeist]

"You can't just skin someone alive just because they have fake jorda-"
2:15

[anonymouslee]

This does give me some insight into why short stroking could cause the gun to malfunction so easily. If you don't pull far enough, the bar holding the shells in the tube magazine won't disengage to let the shell pop into the feed ramp, causing a failure to feed malfunction.

[martinaee]

It’s kind of crazy how reliable these are all things considered. Engineering of them is cool, but also that they can be reliably manufactured to work so smoothly is insane.

[cobrastrike]

Its just amazing that reloading and shooting a shotgun takes seconds, yet explaining how it all works takes minutes, and going into even more details about how it works might take hours

[kathydavis]

My Christmas present this year was a Winchester XSP. I haven't fired a weapon since I was in the Army in the 80's! Your video was by far the best I have watched while preparing to head to the range for the first time! Thank you!