This is the site I downloaded World of Guns: store.steampowe... You can check out the website of the developer of World of Guns at this link: noble-empire.com
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.
These videos are a gold mine of information. Very in depth while remaining simplistic. Everything is very explained well with great visuals for easy and further understanding. Amazing job Mousegunner! Thanks for making these.
One thing. On the MG42 trigger group the sear disconnector plays an important role specific to this design. Normally you do not need such a device on a strictly automatic firearm as a simple trigger connected to a sear is sufficient to stop the bolt. The MG42 however has two issues that make for the need of this particular disconnector. The issue arises from the heavy bolt traveling at high speed that must be stopped by a sear that is relatively long and thin. Because it is an automatic only weapon when you release the trigger the bolt can find itself at any point on it´s travel. If it finds itself right behind the sear as it comes back up to catch it the bulk of the bolt energy could be caught by only a few thousands of an inch sear engagement. Couple this tiny contact patch with the high bolt speed and energy and you can end up with shearing of the long sear and/or its deformation, which is naturally not acceptable. Enter the MG42 disconnector. This specific disconnector design ensures that after the trigger is released the sear will only be allowed to reset itself with the rearward motion of the bolt. As such, the sear will never be reset with the bolt moving forward for the above mentioned reason, rather it resets with the bolt moving backwards and only backwards. This ensures the sear has enough time to reach its hardstop as it requires less time to do so than the bolt which has to continue moving backwards through the override region and rebound off the buffer. By the time the bolt reaches the catch position the sear is in the fully home position, therefore exposing maximum area on the sear surface to stop the bolt safely. Without this disconnector on this particular sear design the bolt will slowly but surely shear the sear edge during use. It is an interesting design detail particular to the MG42.
I would actually like to take credit for that statement myself, since this was never something I was taught. Yes, I worked in Arms Gallery, but I came up with that myself. I have a bad habit of giving credit to others because I'm afraid of not being taken seriously.
Thank you so much for taking the time to explain everything in detail! Most X-ray videos only play the animation which makes it difficult to understand what's happening.
As easy as it gets, you can manufacture an open bolt smg with regular supplies and parts from a AutoZone, hardware store, and home Depot, Lowe's, salveyard car parts
This is honestly one of the greatest gun video explanations I have ever seen... THANK YOU SO MUCH.. I cannot wait to watch your other videos.. I feel like I just found my new Netflix series hahaha
Great video, while I agree that most open and a few closed bolt actions don't lock open on the last round, it has nothing to do with the action type and everything to do with weather a bolt hold open is incorporated into the system, the one open bolt that has this is a thompson SMG, pretty unique, advanced for it's time, and useful for speeding up reloads. AKs and HKs don't lock open are good examples of closed bolts that don't lock open on the last round.
Do find all this fascinating!! … Few little sloped & cammed edges etc, all seems very simple but absolutely ingenious!! AND this can happen up to and over a 1000 times per minute, 15-20 cycles per second!! …
The BAR's "fires from open bolt, but it's linear-hammer-fired" system would possibly be amenable to firing from the closed bolt in semi, like the FG-42 which is an odd duck itself (and whose fire-control is just like an open-bolt weapon).
You are one of the best YTers for educating people on the workings of firearms! Taking the time to develop such detailed models that show the events adds so much educational value. Thanks and keep up the great work!
Single Shot/Semi automatic in British Military Parlance is "Repetition" hence R and Automatic is simply A. Same to this day on the L85A2. STEN is crude and Simple, UZI is elegant and well thought through.
It has been ten years since I last fired an MG3 when I was in the army. Do I remember correctly that you could only feed the ammo-belt if the bolt was back in the cocked position?
TBH I don't have a problem with auto/semi auto switches. If you need to take out multiple targets the semi will become handy. But if you are cover firing for someone (if you have a high cap mag with this gun and a way to cool the gun down) the automatic is going to be useful
A really explanative video.I have been wondering for years just how the Sten changed from single shot to fully automatic and this video tells me clearly..Most youtube videos seem to skip this particular area of operation leaving a bit of a grey cloud hanging over. Could you please explain how the cartridge does not fire when the bolt head comes in contact with it prior to entering the breech? Thanks again for five star detail it is appreciated.
Bit late but essentially the bolt only fully transfers momentum into the round until the round cannot travel any further, which stops the bolt, transferring its momentum. Think about how getting hit in the hand with a hammer hurts more if you lay it out on a table then if it hits your hand with nothing behind it. Force is the change of somethings momentum. So when the bolt stops it transfers force into whatever stopped it.
@@Prometheus7272 Thank you . The hammer on the table explanation is a brilliant way of explaining it . Now I know . The bullet is always moving away from the bolt until it stops in the chamber and then detonation occurs . Thanks again .
Yes, longer barrels are beneficial in most instances of firearm design. How beneficial is mostly dependent on the ammunition itself. Basically the longer the barrel is the more time it spends accelerating due to the force exerted by the expanding gasses of the burning propellant. Some cartridges benefit more by the length of the barrel then others, due to burn rates of different powder types and so on. There is a point of diminishing returns though, where the force exerted by the expanding gasses starts being balanced out by the friction of the barrel on the projectile, but in general terms a longer barrel is usually a good thing in any firearm design.
Thank you!! I am gathering a bunch a research on open bolt blow back guns and your vids have helped me get an understanding of how they work. I am trying to make a 9mm open bolt blow back, more or less along the lines of a Sten. :)
Thanks for explaining. I imagine head space has to be very tight to get fixed pin to fully strike primer. Does this cause a problem with various brands of ammo or cases with shoulders not in spec?
I mean, it's pretty easy to convert most semi only variants... maybe not that easy. But yeah, it's also illegal to own any machinegun made after 1986(without ffl and sot). And to make them. And to not pay a 200 dollar tax and submit to an ATF investigation and CLEO approval to buy one. And pay the 20000-50000 dollars one costs. So "regulate" means "make prohibitive".
Your videos are amazing!!!! I was curious as to what a blowback system was. You far exceeded my expectations for an answer. Thank you for the excellent presentation. I will be subscribing to this channel for future reference material 👍👍👍
Sorry just watched video again and have seen that edge groove of bolt peels off round and not the face of the bolt. Does the barrel face have a concave bevel to assist round on entering breech ?
What you would want to get royalties off of is a patent not a blueprint. If you have an idea that you want to pursue, I highly recommend researching patents and how to file them. For a patent you don't need to showcase every element of a design only the relevant novel element that you are trying to patent. If your idea doesn't qualify as novel then it isn't patentable and I am sorry to say no one is likely to be willing to pay you for anything. Not to be discouraging or anything but I would do a lot of research before committing to this endeavor, as a lot of elements of firearm design has already been designed, coming up with something that is novel will be tough. Also, I suggest not telling me or anyone else about it until you have a strong understanding of patent law or the advice of someone that does.
I'm confused as to how the gun stops firing when you let the trigger go in full-auto if the sear bar is off to one side. Does the sear bar reset until the trigger is pulled again?
In some operating/action systems, in particular straight blowback systems like the uzi or the sten, it is not required, as you said the recoil energy of the gases will do the job, but the extractor does help with smoother more reliable extraction.
The firing pin simply doesnt have enough momentum behind it to strike the anvil until the weight of the bolt can come down on it when it gets chambered.
If someone really wanted to convert a closed bolt gun into full auto, couldn't they fix the firing pin forward like an open bolt gun? I understand that you wouldn't be able to stop it from firing, but if you REALLY wanted to do it, would it work? Or would it fire out of battery?
I know this was 3 years ago but in short, yes it's possible. Let's use an AR for example. If you fix the pin in place the charge handle or bolt release would essentially be your "trigger" and in the same aspect you should essentially be able to use the bolt hold to stop it from shooting. Now on a gun like an AK with no bolt hold, same concept, you charging the gun will fire it and it won't stop until you either get light primer strike or run out of ammo
But all open-bolt weapons do have a firing pin whose movement is a function of the bolt's movement, and nothing else. Usually this means the firing pin is levered forwards at the front of the bolt's travel, although on the M134 Minigun it's more like screwed forwards.
