Comments by "" (@neutronalchemist3241) on "Benelli B76 Family: Italian Inertial Locking Autopistols" video.

  1.  @ThorneyedWT  For a gun of that weight and size, the B76 was unusually sturdy too. Benelli was the first company to publicily advertise the gun as being able to shoot safely extremely hot loads. (how many companies still advertise to not use +P ammunitions on their guns?)
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  2. @Trebonius Flonius Think of a Newton cradle. The line here is caseback, bolt, lever, slide.
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  3. It has to be said that, in the '70s, many decocker-less DA/SA designs appeared. CZ75, the original Beretta 92, Bernardelli P018... In all those designs, like in the B76, the half-cock position was intended to be the "safe" option for decocking, since you could hold the hammer (or put a finger in front of it), pull the trigger, allow the hammer to move only slightly, and at that point, releasing the trigger, the hammer would have seated safely on half-cock position. Only later it appeared to be clear that, for a service SA/DA pistol, a decocker was almost mandatory (It's revealing that, while the original CZ75 retained the 1911/style safety, the "clone" Tanfoglio TZ75 of the early '80s already had a Beretta-style slide mounted decocker).
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  4. Gravity is not required.
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  5. Or about poor old Bernardelli, whose "semiautomatico", prismatic magazine, shotgun had been the first Italian inertia-locked gun.
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  6. Giugiaro designed the PX4 Storm and CX4 carbine.
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  7. All those pistols, like the Bernardelli P08, and this one, have the half-cock position. That's what was intended to replace the decocker, as, if you hold the hammer, pull the trigger, allowing the hammer to just slightly move forward, and release the trigger, the hammer will safely seat in half/cock even if you suddenly release it. From half-cock, the first double trigger pull is more pleasant too (same weight, but shorter pull).
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  8. The locking mechamism is unusual in it's operating principle, but the pieces are pretty simple to machine. The frame is actually stamped, so the simplest it can be.
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  9. It thad been the first 9mm pistol where the manufacturer advertised the gun was designed to shoot very hot loads without problems (at the time there was not the definition of "9mm +p").
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  10. The conservation of momentum, like in a Newton cradle. Obviously, since the form of the pieces is a lot less ideal than those of the spheres, a lot of pressure generated by the cartridge is only enought to make the slide move few mm, but that's all that's needed.
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  11.  @andrewscott8892  Don't know if 9x21 is available in Mexico. I know .38 Super is used there. Don't know all the countries where 9X19 is forbidden for civilian use, but there are several (France, Belgium...) the rationale is not, as often asumed, to "control population" (it would be ridicolus, since more powerful calibers are allowed) but to control security forces. The autorities there don't want a policemen to be able to privately buy ammos for his service weapon. However in Italy only 9X19 is banned. 5.57 NATO and 7.62 NATO are allowed.
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  12. The locking mechamism is unusual, but pretty simple. The frame is actualli stamped, so the simplest it can be.
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  13. Complicata? Ha la canna fissa e l'otturatore in due pezzi. E' meno complicata di qualsiasi pistola con sistema Browning.
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  14. Bren is a gas action. Way more complicated.
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  15. Contrary to popular belief, the reason to not allow civilian sales of 9X19 cartridges, while civilians can buy 9X21, 40 S&W, or 10mm without problems, is not to control people. Is to control security forces. What the government wants to avoid is a policemen, or a soldier, to enter in a gun shop and privately buy cartridges for his service weapon.
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  16. And 9mm Glisenti, and before the 9mm Browning Long. Energy-wise they are all ain the same ballpark, "the most powerful 9mm ammo that can be shoot in a blowback handgun without weight disadvantages".
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  17. Much more pieces. Too complicated for a pistol.
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  18. Infact that's the reason 9mm Luger case is not perfectly cylindrical.
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  19. Breda shotguns are inertia locked too. The Breda inertia lock had been the last design made by Bruno Civolani, the same guy that previously designed the system for Benelli . Really, when Benelli introduced the Inertia lock, the firm was owned 50% By Beretta and Breda, and Civolani worked for Breda. Also in the '70s decockers for SA/DA pistols were not that common. The CZ75 and the original Beretta 92 had 1911/style safeties too. It would have been interesting to note that the frame is stamped. Among the possible advantages of the system, it has to be said that Benelli was the first company to publicily advertise the gun as being able to shoot safely extremely hot loads.
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  20. Another advantage is that, despite the apparently complicate action, the gun is easy to manufacture. The frame is stamped, and almost all the milled parts have simple straight cuts.
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  21. It has a fixed barrel and a two-pieces bolt. It's less complicate than any Browning tilting barrel design.
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  22. Actually, for a pistol that size and weight, the B76 was unusually robust. Benelli had been the first manufacturer to advertise his gun being able to handle extremely hot loads (how many manufacturers still recommend to not use +P loads on their guns?).
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  23. The locking mechamism is unusual in it's operating principle, but the pieces are pretty simple to machine. The frame is actually stamped, so the simplest it can be. As for the benefits, actually Benelli was the first company to publicily advertise the gun as being able to shoot safely extremely hot loads. (how many companies still advertise to not use +P ammunitions on their guns?)
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  24. In a pure inertia system, like that of the Benelli inertia shotguns, yes. If the gun doesn't move, the bolt doesn't unlock. This is more a mix of inertia, lever-delayed blowback, and mechanical disadvantage (already the Bernardelli Victor, a very interesting shotgun, used a mix of inertia and mechanical disadvantage), so it's possible it works even with the gun solidly locked.
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  25. Think of this https://upload.wikimedia.org/wikipedia/commons/d/d3/Newtons_cradle_animation_book_2.gif The case is the first element of the line, then the bolt, the lever, and finally the slide.
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  26.  @76horsepower  The "hammer" is the explosion of the powder. That's the first impulse. When the breech is closed, the slide is actually resting on the lever (the lever can't rotate further forward) not on the frame, so the system is tight enough to transfer the impulse.
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  27.  @76horsepower  the lever can't pivot further forward, so it can't dampen the impulse coming from the case. In that respect it's like a rigid element (like the spheres in the Newton's cradle).
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  28.  @76horsepower  Because in locked position the lever pushes the rear of the bolt downward, so making the locking effective. When the pressure is lifted, the same lever allow the bolt to push the slide backwards. The little pin in the slide that lifts the bolt is only required to drag the bolt when the slide is manually racked. When the pistol is fired, the bolt is pushed by the residual pressure in the barrel. The lever could have been replaced by a complex curved form of the surfaces of the bolt and slide, but it was easier to machine the lever.
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  29.  @76horsepower  Yes.
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  30. 1) I can't see how this remark can apply to this gun. 2) Actually Germans are pretty famous for overengineering firearms.
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  31. Actually Benelli was the first company to publicily advertise the gun as being able to shoot safely extremely hot loads. (how many companies still advertise to not use +P ammunitions on their guns?)
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  32. No. When the breech is closed, the lever is pushing rear of the bolt downward (in the locking recess) due to the tension of the recoil spring. Gravity is not needed for the gun to work.
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  33. It cycle in any direction. It's the recoil spring that hold it tight.
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  34. Inertia. The initial recoil moves the entire pistol backward in the shooter's hand. Then the frame stops (because it's held by the hand) and the slide continues for the little bit that's needed to unlock the bolt.
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  35. In italy 9x21 replaces 9X19. It's even a hotter than most commercial 9mm loads (its equivalent to 9mm NATO). The overall lenght is the same of the 9x19. Only the case is 2mm longer, with the bullet seated 2mm deeper. It had been noticed that the longer case feeds more reliably too.
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