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Klub Zbrane [ŽP: 24 týdnů] (kategorie Věda a Technika) moderují Al, El_Diablo, ocs, themajkl.
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Omlouvám se ale bohužel jsem musel zakázat psaní anonymům, protože nám tu nějaký sabotér vložil "hack" kvůli kterému nešlo přispívat nikomu. Nevím jestli to pomůže, ale snad nad tímto darebákem budeme mít větší kontrolu.
Srdečně zveme do tohoto klubu všechny, kteří se zajímají o zbraně, střelbu a všechno, co s tím souvisí a chtějí si o tom všem v přátelské atmosféře povídat, poradit druhým, nebo se naopak chtěji zeptat na radu.

Kdo chce vystupovat anonymně (tj. bez registrace na Lopuchu), musí si vymyslet nějaké jméno nebo přezdívku a psát ho do každého svého anonymního příspěvku.

Každého přece musíme v diskusi nějak oslovovat, aby bylo jasné, kdo na koho reaguje. Kdybychom měli odpovídat několika bezejmenným anonymům najednou, byla by diskuse značně nepřehledná. Takže, kdo neuvede jméno či přezdívku, ten jako by nebyl.

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    Early Automatic Pistol Cartridges - What, When & Why?
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    el_diablo El_Diablo Veškerá nepodstatná elektronická zařízen - mimo provoz, včetně kontroly pravopisu. 1.6.2024 01:42  34315
    ПМ против Parabellum: почему в СССР не стали копировать немецкий боеприпас
    PM vs Parabellum: proč SSSR nezačal kopírovat německou munici

    Unitární pistolový náboj 9x19 mm Parabellum, vyvinutý již v roce 1902 německým konstruktérem Georgem Lugerem, se dodnes používá jako standardní náboj v zemích NATO. Ruské verze této kazety a pistolí pro ni, které se objevily v letech 1990-2000, se však nerozšířily.
    el_diablo El_Diablo Veškerá nepodstatná elektronická zařízen - mimo provoz, včetně kontroly pravopisu. 31.5.2024 14:11  34314
    Glock 46: A Revolutionary Design Change

    Except for the .22 rimfire Glock 44, all the pistols from the Austrian powerhouse Glock have shared the same fundamental mechanical system. They use the Browning tilting-barrel action, which has been long proven by many companies. With the Glock 46, however, they completely changed, and opted for a short recoil, rotating barrel design. The 46 also includes a couple other unique features for Glock, specifically intended to suit its intended role as a German police sidearm.

    In Germany, each state is responsible for selecting and procuring police weapons, but they must follow the technical standards set out by the Federal-level government. The standard Glock models do not meet these requirements, and so Glock had to develop a new model if it wanted to compete for police contracts. Most substantially, pistol disassembly must not require pulling the trigger, as this is one of the most common causes of police NDs (and this goes back at least to the Luger, which got its own police safety modification in the 1920s). The gun must also meet minimum requirements for trigger pull weigh, distance, and total force to fire.

    To meet these requirements, the Glock 46 has a longer tigger travel than other Glock models, made possible by slightly reshaping the trigger itself. It also has a novel striker disconnect in the back of the slide, which allows (and requires) the striker to be rendered completely inert for disassembly. In addition, a new disassembly lever requires the magazine to be removed before the slide can come off the gun. Put together, these features make the Glock 46 fully compliant with the Federal German police standards.

    The rotating barrel system is not required by any other these Federal standards, and it remains a bit unclear why it was chosen. The action itself is distinct from the disassembly safety system, and either one can be incorporated into a design without the other.

    Glock has thus far won one German police contract for the 46; that of Saxon-Anhalt. That agency purchased 8,600 Glock 46 pistols for their approximately 6,000 officers. It is extremely unlikely that we will see these pistol in the US, as Glock sells them only to police agencies and not to the civilian market in Europe or the US.

    Thanks to Glock for giving me access to film this pistol at their booth at EnForceTac 2024!

    Specific German police trigger pull requirements:

    First shot:
    Minimum pull weight: 30N / 6.7 lbf
    Trigger pull distance 10-15mm / 0.4-0.6 in
    Minimum value for “trigger work” (Trigger travel x trigger pull weight): 0.15J / 1.3 in-lb

    Subsequent shots:
    Minimum pull weight: 20N / 4.5 lbf for all following shots
    Minimum reset distance: 4mm / 0.16 in
    Minimum trigger travel after reset: 7mm / 0.28 in

    Requirements for unlocking the action:
    In locked systems, the trigger mechanism must be interrupted before the initiation of the unlocking takes place. The path of the moving weapon parts until the trigger mechanism is separated is allowed not be greater than 75% of the safety path.
    el_diablo El_Diablo Veškerá nepodstatná elektronická zařízen - mimo provoz, včetně kontroly pravopisu. 29.5.2024 16:09  34313
    Sten MkII: Just When You Thought It Couldn't Get Simpler

    The Sten MkI had barely been approved for production when the Sten MkII was born. Initially requested to produce a version of the gun suitable for paratroopers, in March 1941 Harold Turpin redesigned the front end of the Sten to have a quickly detachable barrel and a rotating magazine well (for compact storage). This new model was tests in late June and early July, approved for use, and contracts for it were issued in August 1941.

    Named the MkII, this model of the Sten would quickly become the standard, and it was ultimately produced by six major factories (with the assistance of hundreds of subcontractors) on three continents to the tune of 2.6 million examples made. In addition to the barrel removal, the new model has a simpler front sight, simpler stock, and a revised bolt locking notch (upward, instead of downward like on the MkI).

    Many thanks to the Royal Armouries for allowing me to film and disassemble these submachine guns! The NFC collection there - perhaps the best military small arms collection in Western Europe - is available by appointment to researchers:
    el_diablo El_Diablo Veškerá nepodstatná elektronická zařízen - mimo provoz, včetně kontroly pravopisu. 27.5.2024 15:46  34312
    Arsenal Strike One: Russian Police Pistol Comes to the West


    The Strike One pistol originated around 2011 as a collaboration between Nicola Bandini and Dimitry Streshinskiy as a pistol to replace the Makarov in Russian police use. By 2014 is was progressing very successfully through testing and trials, and had gained some international interest, and that's when (allegedly) bribery negotiations went badly and the gun disappeared from Russian official consideration. The company behind it (Arsenal Firearms, out of Italy) pivoted to international commercial markets, and it was released in the US and Europe instead. It has since gone through several iterations and importers, and is currently being manufactured in parallel as the Arsenal Strike One in Italy and the Archon Type B in the Czech Republic.

    Mechanically, the gun is mostly interesting for its non-Browning operation system. It is a short recoil action using a vertically traveling locking block, similar to (but developed independently of) the Bergmann 1910. This action allows it to have a very low bore axis, and the fire control parts are similarly unorthodox in pursuit of that low axis. The version in the video today is a Strike One Speed, and it is indeed a flat-shooting, very nice pistol!

    Disclosure: This pistol was provided for filming by American Precision Firearms, the importer for Arsenal Italy.
    el_diablo El_Diablo Veškerá nepodstatná elektronická zařízen - mimo provoz, včetně kontroly pravopisu. 25.5.2024 00:17  34311
    AnimaceHow a Japanese Type 11 LMG Works
    el_diablo El_Diablo Veškerá nepodstatná elektronická zařízen - mimo provoz, včetně kontroly pravopisu. 24.5.2024 23:54  34310
    3D Animation: The Very Unconventional Type 11 Machine Gun
    The Type 11 light machine gun was a machine gun used by the Imperial Japanese Army in the interwar period and during World War II. It was designed by Japanese arms designer Kijirō Nambu, based on a modification of the French Hotchkiss M1909 machine gun. It was an air-cooled, gas-operated design, using the same 6.5 by 50mm Arisaka cartridges as the Japanese Type 38 infantry rifle.

    The Russo-Japanese War of 1904–1905 had convinced the Japanese of the utility of machine guns. The Army Technical Bureau was tasked with the development of a lightweight machine gun which could be transported by an infantry squad. The resultant "Type 11 light machine gun" (named after the 11th year of the reign of Emperor Taishō) was the first light machine gun to be mass-produced in Japan and the oldest Japanese light machine gun design to see service in the Pacific War.

    A unconventional feature of the Type 11 machine gun was its detachable hopper; it could be refilled while attached and did not require removal during operation. Instead of a belt or box magazine, the Type 11 was designed to hold up to six of the same cartridge clips used on the Type 38 rifle. The five-round clips were stacked lying flat above the receiver, secured by a spring arm, and the rounds were stripped from the lowest clip one at a time, with the empty clip thrown out and the next clip automatically falling into place as the gun was fired. The system had the advantage that any squad member could supply ammunition and that the hopper could be replenished at any time. The relatively short barrel of 17.5 inches produced excessive flash with standard ammunition intended for the Type 38 rifles with barrels more than a foot longer. As a result a new load was introduced which burned faster in the Type 11's short barrel and produced less flash. This new round was called the 6.5 by 50mm Arisaka genso round.

    The disadvantage of the hopper was that the open feeder box allowed dirt to enter the gun, which could lead to malfunctions in combat. Another issue was that the weight of the rifle cartridges in the side-mounted hopper unbalanced the weapon when fully loaded. To compensate, the buttstock was designed in a way that it bent to the right, leading to the Chinese nickname "bent buttstock".

    The Type 11 came into active service in 1922, and some 29,000 were produced by the time production stopped in 1941. It was the primary Japanese light machine gun through the Manchurian Incident and in the early stages of the Second Sino-Japanese War. It remained in service through the end of World War II. It was replaced by the Type 96 light machine gun.
    el_diablo El_Diablo Veškerá nepodstatná elektronická zařízen - mimo provoz, včetně kontroly pravopisu. 24.5.2024 18:15  34309
    Cartridge History: The .451 Detonics Magnum is a Supercharged .45 ACP

    Detonics was founded as a company in the 1970s, making high-end 1911 pistols. Their first product that really put them on the map was their 3" micro-compact 1911; something that just wasn't available on a production basis at the time. After the .45 Winchester Magnum cartridge was introduced in 1979, Detonics jumped at the chance to now make a higher-power .45 cartridge that would fit the 1911 magazine. Since the .45 WinMag brass was much thicker at the base than .45 ACP, Detonics was able to cut it down to ACP length (actually one millimeter longer, to prevent it from being chambered in a standard .45 ACP chamber). They then cranked up the pressure and were able to increase velocity by 30% over the original .45 - and they called the new round .451 Detonics Magnum.

    Detonics made several different models of pistol in their new cartridge, both standalone guns, replacement slides for other frames, and package sets with both .45 and .451 barrels. They were never able to get an ammunition manufacturer on board though, and the .451 remained a hand loading proposition throughout its entire life. This crippled its chances at becoming mainstream, and it remains a very niche cartridge to this day. Its successors included the .45 Super and the .460 Rowland, which survive today but are definitely special-interest offerings.
    el_diablo El_Diablo Veškerá nepodstatná elektronická zařízen - mimo provoz, včetně kontroly pravopisu. 24.5.2024 01:49  34308
    The foldable British Barrett: Steel Core Cyclone HSR with firearms expert Jonathan Ferguson

    50.cal is a calibre that often packs a punch, especially when it belongs to a precision rifle.
    el_diablo El_Diablo Veškerá nepodstatná elektronická zařízen - mimo provoz, včetně kontroly pravopisu. 22.5.2024 17:54  34307
    Sten MkI & MkI*: The Original Plumber's Nightmare

    The Sten gun was designed by RSAF Senior Draftsman (sorry, Draughtsman) Harold Turpin in December, 1940. He sketched out a simple trigger mechanism on December 2, showed it to Major Reginald Shepherd the next day, and then finished out the rest of the submachine gun design that week. The first prototype gun was completed on January 8, 1941 and it was tested by the Small Arms School that same month. The design was approved for production (alongside the Lanchester) March 7th, 1941 and the first of 300,000 Sten MkI guns was delivered to the British military on October 21, 1941. The MkI and MkI* Stens were all manufactured by the Singer sewing machine company in Glasgow, with three contracts for 100,000 guns each issued in 1941.

    The Sten was the British response to a dire need for a large number of cheap infantry weapons, and it served that purpose well. The MkI was quickly followed by a somewhat simplified MkI*, which discarded the unnecessary flash cone and the wooden front grip. An even simpler MkII optimized for mass production followed, along with a MkIII. As the end of the war approached the MkV was introduced which had much improved handling, and it would remain in service until the 1950s, when it was finally supplanted by the Sterling.
    ocs ocs sine ira et studio - OCSite 20.5.2024 20:20  34306
    Hezky se nám ta sluníčková demokracie rozvíjí. Aktuálně jsou na talíři domovní prohlídky bez soudního příkazu. Za chvíli na tom opravdu nebudeme o nic lépe než před '89 :(
    666 666 Bože, chraň nás před těmi, - kteří v tebe věří. 16.5.2024 21:08  34305
    Mně právě překvapuje, že Gawron, Černý ani nikdo z lexu o tom nepíšou...
    ocs ocs sine ira et studio - OCSite 16.5.2024 14:28  34304
    666: sám nevím, ale doporučuji zkusit projít články u pana Gawrona na zbrojnici, a není-li v některém z nich odpověď, optat se tam v diskusi u nějakého vhodného. Myslím, že asi momentálně nikdo v této nešťastné zemi nemá o nové legislativě tak dobrou představu, jako pan G. (včetně těch, kdo ji psali).
    666 666 Bože, chraň nás před těmi, - kteří v tebe věří. 15.5.2024 14:34  34303
    Nevíme jak je to s nově připravovaným zákonem (novými kategoriemi zbraní a ZP) a "velkými" zásobníky? Podle nějakých citací zákona jsem pochopil, že už to nebude taková švejkárna jako dnes s univerzální výjimkou. Má někdo nějaké informace?
    el_diablo El_Diablo Veškerá nepodstatná elektronická zařízen - mimo provoz, včetně kontroly pravopisu. 15.5.2024 14:25  34302
    SA-85S: FEG Adapts the Hungarian AK for American Import

    Hungary began importing semiautomatic civilian versions of FÉG's AK-63D into the United States in the 1980s. As more restrictions were put on importation, the models had to change several times to remain legal. The pattern produced between 1990 and 1994 was the SA-85S with a thumbhole stock, and a total of 24,500 of them were imported during this period.
    el_diablo El_Diablo Veškerá nepodstatná elektronická zařízen - mimo provoz, včetně kontroly pravopisu. 13.5.2024 18:06  34301
    Finland's Prototype Belt-Fed GPMG: L41 Sampo

    During the 1930s, there was interest in Finland in replacing the Maxim heavy machine gun with something handier and more mobile. There were experiments with large drum magazines for the LS-26 light machine gun, but these were not satisfactory. Aimo Lahti began to work on a gas-operated GPMG, but lack of funding and competing priorities led to it having slow progress until the eve of the Winter War. By the time the gun was completed and the first preproduction batch ready for troop trials, the Continuation War was underway.

    Twenty eight of the L41 Sampo machine guns were sent out to a variety of units for field testing in the fall of 1942, and the guns were generally well liked, although not perfect. Before improvements and full-scale production could begin, though, the Finnish military was basically distracted by an alternative possibility of procuring MG42 receivers from Germany and building them into complete guns in 7.62x54R. At least one such prototype was completed, and that project caused the L41 program to stall. By the time it might have progressed, the war was going rather badly for Germany and the possibility of getting receivers was basically gone. The L41 never did see further refinement or production, although the trials guns remained in service with their units, in a few cases right until the end of the war.

    Mechanically, the L41 is a fascinating hybrid of Bren/ZB and Maxim elements, and incredibly sturdily built. Only seven are know to survive today, six in Finland and this one in the UK. Thanks to the British Royal Armouries for giving me access to it to film for you!


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