Comments by "" (@neutronalchemist3241) on "Forgotten Weapons" channel.

  1. So they managed to screw a design so simple that many people and resistance movements managed to manufacture functioning samples in their box. Chose the wrong magazine, Made a SMG difficult to cock thanks to the absence of the charging handle, made two serrations in front of the bolt to try cocking it, but didn't manage to make a real telescopic bolt. "interesting".
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  2. It provides a slight delay and an out-of-battery safety, since the firing pin can hit the primer only when the bolt is fully rotated.
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  3. Yeah. The magazine safety is a foolproof safety (for those that remove the magazine, but forget the round in the chamber) but, if you really need to fire the gun without a magazine...
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  4. Already 19th century bolt actions had nuts that couldn't unscrew by themselves. Until the M60 it was completely obvious for any weapon designer. IE https://youtu.be/KCvIEioG9Y0?t=601
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  5.  Dock None  Err... No. Despite the Italian Partisans being communists for more than 2/3, the CLNAI was managed on strictly equal basis by the four major groups (Communists, Socialists, Catholics and the Partito d'Azione), since the objective was to get rid of the fascists and the Germans.
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  6. Any FMJ rifle cartridge can do that. It's due to the hydraulic shock. The same that causes the temporary cavity on wounds. In skull there isn't space for the temporary cavity to form, so the result is the explosion of the skull itself.
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  7.  @atomicsmith the only mechanical advantage created by the lever is that the carrier has to move at a faster pace than the bolt, so exchanging mass for speed. The ratio of the pace is decided by the ratio of the leverage. Actually the weight of the bolt carrier is a MAJOR factor in those designs (see for example that of the FAMAS, that's all but "negligible") because the lighter the carrier, the higher the leverage ratio needed to obtain a safe enough locking, but the higher the leverage ratio, the narrower the difference from too early and too late opening. That's why the AA52 is the appreciated and trouble-free French GPMG since 1952 (because a 10kg GPMG can have a quite hefty bolt, that doesn't need so much leverage ratio to delay it's opening) while the FAMAS, that had more stringent weight requirements had a troubled development process (the F1 couldn't even safely fire NATO standard munitions).
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  8.  @atomicsmith  It's not a mith, it's how physics works. What you call "mechanical disadvantage" is only the mechanical disadvantage of moving a mass. No mass, no disadvantage. The "mass of at least 20lbs to adequately slow a 5.56 casing down" is out of this world. A VERY SAFE formula to calculate blowback bolts weight is to assume a 4m/s bolt velocity is safe, then the required bolt mass is: bolt mass in pounds = 1.09×10-5 * bullet mass in grains * bullet velocity in fps * (diameter of bolt face / diameter of bullet base). According to this formula, .223 Rem requires a 7 pounds bolt. In reality this formula is well known to give bolt masses that are far too high and become exceedingly higher as the power of the round increases. IE, according to this formula, 1.7 pound is required for 9mm Parabellum and 2.3 pounds for .45 ACP. Reality is that it requires a minumum of just 10 ounces for 9mm and 12 ounces for .45 ACP. The reason you don't see direct blowback in rifle calibers is that the mass required is is just too large, but it doesn't come even close to the mass you think is required. The lever of the FAMAS is roughly 3 o 1, thats also the limit where a lever delayed blowback stop working because the difference between too little and too much delay becomes too narrow. The spring rate is static, it doesn't change with acceleration. That's why it's not even considered when calculating the bolt's mass.
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  9. Patents on firearms, like for any mechanism, expire in 20 years. Anyone can made an exact copy of the FAMAS like anyone can made an exact copy of the Beretta 92F.
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  10.  @robertmoran7024  You can put it as close to the muzzle you want and STILL have it attached to the receiver (MG42/MG3 IE). The difference is that you can swap barrel without having to change your position, or that of the gun, at all, without having to lay your open gun on muddy soil, or invent ways to not have to.
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  11. That's why US put a stripper clip guide on the M14, and they were the US, and it was post WWII. We are used to movies, where everything always works, but in reality, in the '30s, it was a REAL problem for anyone to manufacture magazines that were at one time so cheap to be discarded on the field, and so well and consistently manufactured to not have feeding problems. Even Brits manufactured experimental tilting magazines for the Bren (they had not been adopted in the end, but their loading was far more awkward than that of the Breda).
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  12. The AR-10 had been tested for adoption by various armies along with the FAL several times, and usually the FAL won.
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  13. Italy used .380 ACP, Germany a mix of 9mm and .32 ACP (because factories had better to do than manufacturing complex pistols in 9mm). In the end, Italy's choice (to select form the start a round that, thus less powerful, spared manufacturing time during the war) was probably better. After the war the Soviets made the same choice with the 9mm Makarov.
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  14.  @Armageddon2077  The Beretta 35 had been adopted by the Italian Navy and the Air Force. The Army went with the 34 in .380 ACP. Despite the Walther P38 nominally being the standard sidearm of the Wermacht, during the war, it fielded more Sauer 38H, Walther PP and Mauser HSc in .32 ACP. As said, the factories had better things to do that manufacturing complex breechlock pistols.
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  15. So why this is made with so few parts?
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  16.  @MrBahjatt  Practically all the classic 6.5mm (Carcano, Mannlicher Schonauer, 6.5X53r) are in the second category, and almost all the ammo proposed to end the 7.62-5.56 NATO dichotomy. Historically Vladimir Grigoryevich Fyodorov designed it as he was impressed by the firepower provided by the Chauchat. He wanted the same firepower, but with better mobility.
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  17.  @DavidNefelimSlayer  It has to be noted that The 7.92mm Kurz had been the first intermediate round to be adopted, but not the first to be conceived that way precisely to be controllable in full auto for a man standing with a rifle-weight weapon. The first one had probably been the 8X35mm Ribeyrolles, of the Ribeyrolles 1918 automatic carbine. That had not been adopted only due to the end of WWI. Then the 7.35X32mm of the Terni 1921 rifle, obtained shortening the 6.5X52mm Carcano cartridge. Already Vladimir Grigoryevich Fyodorov was thinking of a proprietary intermediate cartridge for the Fedorov Avtomat, but reverted on the 6.5 Arisaka due to availability.
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  18. The contrary. This had been made before.
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  19. Yeah. Under the name of Mailechort it was widely used to jacket the projectiles too, and the color of mailechort jacketed rounds of that period is very similar.
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  20. The 7.35 round was not more powerful than the 6.5 one, it only had a larger bullet, designed to be more lethal, and had a flatter trajectory in the first 200m of flight.
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  21. Blueing on case hardened parts. Due to the composition of steel, some turn reddish with time.
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  22. The Finns actually worsened the sights, asking for them to be zeroed at 100m instead of 200m before the rifles being delivered. That way they were practicaly useless past 150m, well into combat distance.
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  23. In the end, the M14 is a semiauto rifle only. A 20 rounds Garand. The selector lever was not even installed standard in infantry rifles. The BM59 is a 20 rounds Garand, AND an effective grenade launcher (grenade sights, gas cutoff and winter trigger) AND an occasional LMG (bipod and tri-compensator).
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  24. Considered that the M45A1 samples tested broke the slide before 12.000 rounds...
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  25. It could have been lighter. Somewere between the M1 rifle and the M1 carbine.
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  26. Those were intended for volley fire, that's a formation firing to another formation, not to single targets. All the fifles of the time had been built thinking to that possibility. In the end it didn't become a thing because that job had been done by machineguns. At 2km a 6.5mm Carcano bullet still delivers more energy than a .44 magnum at the muzzle.
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  27. A rolling block is naturally a single shot. Bolt and lever actions are naturally repeaters.
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  28. It would require so much skill that it can't be done by chance.
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  29. It's a short recoil system infact. 3d animation. https://www.youtube.com/watch?v=2SwNqvUZSW8
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  30. The 6.5 never had accuracy problem. they wanted a bullet with a flatter trajectory in the first 300m (the 7.35 was lighter) and with a better terminal ballistic (the 7.35 had an aluminium tip to shift the center of gravity backward so to ensure it tumbling into the body).
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  31. almost any first generation SMG had the same problem.
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  32. Design patents expired in 14 years (15 since 2015). In mid ’90s any patent on the 92 (and mechanically this is a 92, no “S”, “SB” or “F”) had long expired. The only things still covered by a patent were the few cosmetic changes between the 92SB and the 92F/M9, but anyone could have made even a perfect copy of a 92SB without infringing any patent.
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  33.  @saoirse5308  The 80X is blowback (so is the mass of the slide that dealys the opening of the breech), the CSX id breechlock. The 80X also has 3.9" barrel lenght, while the CSX only have 3.1.
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  34. Cost? The PP is a complex weapon.
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  35. The Vetterli was quite advanced when Italy adopted it in 1870. The subsequent conversions were not "we want something new", but "we want this rifle to be still serviceable for rear echelons troops".
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  36.  @victorpapillon1487  Bernardelli too.
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  37. Those guns were manufactured in Germany, and, in those years, the German Mark more than doubled its value compared to the US Dollar. However the price point didn't matter at all in the P7 not having been selected in the XM9 program. The P7A13 didn't even reach the cost comparison phase of the trial. It was eliminated because it fared atrociously in the reliability tests.
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  38. For what advantage over the MAS49/56? The problem of this, or any other battle rifle in 7.62 NATO, for the French, is that it had practically no advantage over what they already had. When the Italians switched form the M1 Garand to the BM59 (that was a modification of the Garand, not a new rifle) the gained the detachable magazine, grenade launcher with gas cutoff, compensator, bipod... it was worth the price. But the MAS 49/56 already had the detachable magazine, grenade launcher with gas cutoff and compensator.
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  39.  @Giloup92  He said the Carcano M38 (not any Carcano) it was the best bolt action. Simple, fast to load, rugged and lightweight. Obviously semiautos were on another legue.
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  40. The Bernardelli Victor is one of the most interesting shotguns ever. Practically the action of a SVT40 with all the gas part removed, and it works thanks to a mix of mechanical disadvantage (the tilting bolt locks at a slight angle, so it's not perfectly locked) and inertia (of the bolt carrier that, pushed by recoil, lifts and unlock the bolt anyway if the mechanical disadvantage is too much for the load). The first models needed to change recoil spring between light and heavy loads. The subsequent ones didn't even need that.
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  41.  @italianduded1161  The US patent for the firing mechanism, unfortunately partial, but the scheme of the bolt and bolt carrier is pretty clear, is the US2622359A The inventor is Baldassarre Belleri
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  42. The BAR did pretty well. Obviously it did cause it was heavy, but this thing, even if not as heavy as a BAR, is heavier than most semiauto rifles and battle rifles, and I suspect that gas piston assembly makes it point heavy. Couple it with the fact that a 7mm Mauser is not a 30-06 Springfield, and it could make a 4 round bursts still controllable.
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  43. You really should do some research. The SMG that jammed first was the Thompson of Walter Audisio (those unreliable American weapons...), then he grabbed the Beretta 34 (that's a pistol, not an SMG) of Aldo Lampredi, that jammed too. Mussolini was finally killed with the MAS38 of Michele Moretti.
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  44.  @Jay22222  You referred to it in your comment, and I recalled that perfectly comparable sights became common after WWII.
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  45. Those were MAB 38/49. Same as the 38/42, but with a cross bolt safety.
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  46. They are identical.
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  47. In the end, an Hi-Point slide weights only about 520 grams, and it's enough to delay 9mm +p and .45 ACP. The entire Astra 600 weights 1.08 kg, easily more than 500 grams are on the slide as well.
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  48. They are comparable (IE a Hi-Point 9mm has a factory 17 lbs spring, like that of a Glock 17). Contrary to what's often believed, the stiffness of the recoil spring has a negligible effect in delaying the opening of the action in a blowback gun, and a too stiff spring would close the slide too fast to give the mag spring time to lift the next round. It has to be noted that much of the "bulky" appearance of a Hi-Point is due to its slide being made of zamak3, with a density of only 6.7g/cm3. Steel is about 8g/cm3, so a steel slide would have about 20% less volume having the same mass. Infact the slide of the Astra doesn't seem that bulky.
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  49. I’ve seen Negev 7 firing, and the ROF reported here seems to be WILDLY incorrect. You can really count the ammo as they are fired. it’s a 500-600 RPM MG.
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  50. Actually the ZB vz.26 was one of them. The others were the Brixia 1930 ( https://i.pinimg.com/originals/5f/df/b0/5fdfb00e25648c59171c2db4d4b03a5a.png ) and the FIAT 1928 ( https://i.pinimg.com/originals/99/d7/f5/99d7f5ddb17e0ca743a53f338cc79cc1.png https://i.pinimg.com/originals/32/18/14/3218147f1d0a8d4d411f07ffdeb7ff21.png ). In 1932 the Terni arsenal LMG put in a single weapon all the best features of the various entries of the previous selection ( no oiler thanks to the Brixia 1930 mechanics; Breda 1930 tilting magazine, barrel change, bipod, barrel shroud and pistol grip; FIAT 1928 stock and barrel; http://www.archeologiaindustriale.org/cms/fucile-mitragliatore-modello-terni/ ) In1937 Scotti introduced another "Breda 1930 lookalike", retaining the style of the barrel and the general ergonomy but with his patented gas operation and a vertical detachable magazine ( http://alternathistory.com/files/resize/users/user32336/%20%D0%BF%D1%83%D0%BB%D0%B5%D0%BC%D0%B5%D1%82%20%D0%A1%D0%BA%D0%BE%D1%82%D1%82%D0%B8%20%D0%BA%D0%B0%D0%BB.%207.7%20%D0%BC%D0%BC-700x327.jpg it was aquired in few hundreds of samples and used as a tank weapon first than the introduction of the Breda 1938), and the Scotti naval antiaircraft rifle, an assault rifle in all but name ( https://i.pinimg.com/originals/71/6f/8e/716f8e33be4f124274a6de9457462b65.png there were versions with buttstocks). But at that point the Breda 30 had already been selected, and the improvings were not considered worth to revert a decision taken only few years before.
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