How Select Fire Mechanisms Work in Firearms

In this video I talk about the mechanisms in firearms that allow them to operate in different firing modes, for example semi-auto and full-auto.

[TheMouseGunner]

If you are wondering what program I use for the creation of this video, please check the description. It should be included on every video in this series, if not let me know.

[splewy]

Just an FYI on terminology:
1) That "hook" that holds the hammer back on semi-auto mode is called a disconnect.
2) That piece that holds the hammer back on full-auto mode is called an auto sear

[joesaad]

Probably best video explaining clearly how trigger groups work

[anonwilson]

this was such a great video! from someone who had no idea how firearms work (apart from pull the bang switch to make a hole in the target!) I can actually wrap my head around how it all works!

[stink]

By far the best video on this that I’ve watched!

[oxolotleman]

great video, watching the ak part allowed me to better understand how the M16 trigger group works when I looked at it in game before watching you explain it

[uder]

This is why gun engineers made their big bucks! an awesome work of mechanism and springs.

[BeefNEggs]

Wow that burst fire is genius dude. Imagine being the genius that invented that masterpiece. And thank you! If only school had been stuff like this. Very interesting!

[joshhill]

I love your mind. Not to be creepy, but the way you built that, I could take classes from you and love every second.

[treymaddox]

I’ve always been curious about out the burst fire mechanics played out. That was awesome thank you man.

[toki]

Thats pretty cool that you actually used a very rare (in the M16 / M4 platform) 4 way trigger group with Safe, Semi, Auto and Burst. Actually this is the Colt design with Auto being the first selection off of safe in the position Semi usually is. Safe 9 o'clock, Auto 12 o'clock, Semi 3 o'clock, Burst 6 o'clock.
The DPMS aftermarket version kept semi and auto in the normal places.

You can buy safe, semi, auto and safe, semi, burst trigger kits for under $150 but these 4 way kits are usually $500 plus from being so rare. Too bad the 4 way kits suck in real world use because it makes the trigger pull in auto super heavy since you're pulling against both disconnectors being depressed. This is why they arent popular and hence rare.

[shannonshull]

Very cool program, love these operation and assembly/disassembly videos.

[sktor]

Very interesting how many parts are actually working in unison.

[bhartveersingh]

Good job man love u from India Punjab Amritsar

[ahernandez]

I always wondered about the function of select fire firearms. Thank you for the Great explanation.

[columbuspalmer]

I like the program that illustrates how a gun functions. I’m looking forward to being a gunsmith this would be perfect for me.

[GucciBlanket]

Being into firearms and owning an Ak, Ar multiple of them actually. This video really shows how easy it would be to convert from semi to auto.but anyone reading this don’t do that follow the rules and keep your freedom

[mrshort]

Great Content Great educational info: I've worked with AR's so long, the AK fire controls looked so foreign to me..

[jasonx]

Could you show us how the coat hanger machine gun works???

[brookswade]

You made a super nice video. Please don’t take this as an insult, but the sear is the long straight piece shown just behind the shells. The disconnector is the small hook on top of the trigger.