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Klub Zbrane [ŽP: 24 týdnů] (kategorie Věda a Technika) moderují Al, El_Diablo, ocs, themajkl.
Domovská stránka aktualizována 2.12.2019 05:02
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. 3.6.2023 21:12  33826
    M28/76: A Finnish Competition & Sniper Mosin

    The Finns developed several difference scopes rifles in the 1930s, but none were made in large quantities, and they were not really much used during the Winter War or Continuation War. The first post-war consideration was given to a new model in 1954, but that led instead to a decision to make a competition version of the M28 rifle using nice diopter sights; the M28/57. These were later modified by cutting down their stocks to be better biathlon rifles...up until international biathlon moved form full power cartridges to .22 rimfire.

    In the mid 1960s, Valmet's planned semiauto 7.62x54R sniper rifle on the AK platform failed - it was far too inaccurate. Left in a bit of a lurch, the Army took the M28/57 setup and applied it to the M27 Army rifles, and the resulting M27/66 was an interim sniper rifle, as well as being the standard Army rifle for formal marksmanship competitions. These were supplemented by the old M28/57 rifles, which were rebuilt with new stocks as the M28/76 - which is what we are looking at today. Ultimately, these were all replaced by the TKIV-85 proper sniper's rifle in the 1980s.

    Most M28/76 rifles were made with just diopter sights; only a small number were given scope bases as well. In addition, about 10% were made with left-handed stocks, and I am very lucky to have found an example with both of those features!
    el_diablo El_Diablo Veškerá nepodstatná elektronická zařízen - mimo provoz, včetně kontroly pravopisu. 3.6.2023 21:09  33825
    M28/76: A Finnish Competition & Sniper Mosin
    el_diablo El_Diablo Veškerá nepodstatná elektronická zařízen - mimo provoz, včetně kontroly pravopisu. 2.6.2023 22:18  33824
    Star Model S: A Compact .380 for the Spanish Air Force

    Star introduced their first compact tilting-barrel pistol (the Model D) in 1922. The Spanish military was interested in something along these lines, but the Model D was intended to be a civilian pocket-carry gun, and was just too small for military use. What was needed was something still compact, but with a full-size grip - a gun that could serve as a pilot's emergency pistol, for instance. Star developed this as the Model S, still chambered for the .380ACP cartridge, but with an 8-round capacity.

    The Model S was introduced in 1935, but the Spanish Civil War the next year prevented production from really beginning until 1939. The Model S at that point does get a lot of Spanish military and police interest, including a contract from the Spanish Air Force, which this pistol is an example of (manufactured in 1945). They were purchased by a number of foreign militaries as well, and served with Spanish police forces into the 1990s - despite most people thinking they were just a civilian pistol.
    el_diablo El_Diablo Veškerá nepodstatná elektronická zařízen - mimo provoz, včetně kontroly pravopisu. 31.5.2023 19:31  33823
    Project Lantan: Poland Designs a Modular AK in 7x41mm

    In the early 1970s, Poland wanted to replace their 7.62x39mm Kalashnikov rifles. The Soviet Union was developing the 5.45mm AK-74, but the Poles wanted to make a more ambitious advance in small arms systems. They launched Project Lantan (Polish small arms programs were code named after minerals and periodic table elements). The plan was to create a modular system similar in concept to the Stoner 63 - a single universal receiver that could be fitted with different components to create variety of weapons. These could include a short carbine, infantry rifle, mag-fed light machine gun, squad automatic, or vehicular machine gun (fired by spade grips or remote solenoid).

    The cartridge developed for the rifle was an indigenous 7x41mm round that was longer and more efficient than 7.62x39mm. Two prototype rifles were built, and courtesy of Works 11 in Katowice, Poland we have a chance to take a close look at number 1. Unfortunately its experimental foam/rubber stock has completely disintegrated in the past 50 years since it was built, but the rest of the rifle is intact. It features separate upper and lower receivers and a quick-change barrel and gas tube.

    Once the Soviet Union found out about the project, they forced it to be cancelled. The Soviets wanted caliber commonality within the Warsaw Pact, and they also wanted to collect a license fee from Poland for the AK-74 and 5.45x39mm cartridge. In this they were only partially successful, as the Poles reverse engineered elements of the AK-74 to create their own unique Tantal rifle design instead of licensing the new Kalashnikov. But even so, the Lantan project was squashed before it could advance beyond two initial proof of concept rifles.

    Thanks to Works 11 and all my other friends in Poland who helped arrange access to this fascinating rifle!
    el_diablo El_Diablo Veškerá nepodstatná elektronická zařízen - mimo provoz, včetně kontroly pravopisu. 30.5.2023 23:14  33822
    Finland Salvages a "Tragic Boating Accident": Grafton Vetterli Rifles

    During the Russo-Japanese War, the Japanese government helped smuggle arms to potential revolutionaries in Russia, in hopes of provoking a domestic crisis that would divert Russia military force form the war. This included a plot to buy many thousands of surplus Vetterli rifles (as well as C96 Mausers, Webley revolvers, and a few other odds and ends) and ship them to St Petersburg. The Japanese provided the freighter SS John Grafton , and it loaded up the weapons in Copenhagen.

    The first plan was to unload a few guns in Helsinki and take the rest to St Petersburg; this was scrapped when the ships intended to help unload failed to appear at the scheduled rendezvous. A new plan was formed to drop all the guns in Finland, and the Grafton headed north into the Gulf of Bothnia. When it went to start unloading at Pietarsaari, it ran aground and became stuck. Worried about the response of Russian security forces, a small fraction of the guns were unloaded and then the ship scuttled.

    In a rare true example of a "tragic boating accident", a number of local divers spent several nights covertly bringing guns up form the wreck, including the example we have to see today. Ultimately there was no revolt against the Russian government in 1905, and the Vetterli saw at most very limited use in the eventual 1917 war for Finnish independence. They were not used by the military or the Civil Guard, and mostly became civilian hunting rifles. The Mauser pistols and Webley revolvers did see more fighting, though, as they were more modern and their ammunition more readily available.

    Thanks to the viewer in Finland who loaned me this very cool rifle to film for you!
    el_diablo El_Diablo Veškerá nepodstatná elektronická zařízen - mimo provoz, včetně kontroly pravopisu. 27.5.2023 21:00  33821
    Slovenia's Specialized Bullpup: the F2000S

    When the Slovenian Army decided to adopt a new infantry rifle in the mid-2000s, the Arex Defense company decided to submit the F-2000 into the trials. The H&K G36 was widely expected to be the winner, but Arex had already been involved in making F2000 parts as a subcontractor for FN, and wanted a chance at a domestic-production rifle for Slovenia.

    The one major hurdle was that the Army tender required the rifle to have a carry handle, which the F2000 does not. At the request of Arex, FN agreed to design a version of the rifle with such a feature, but balked at the extremely tight time frame required. So instead, Arex made their own new upper receiver for the F2000, with an elevated picatinny optics rail and a carry handle beneath. This was entered into the rifle trials and ended up winning. A contract for 6500 of the guns was issued, and they were delivered in 2006-2007. The final design was designated the F2000S by FN (not to be confused with the civilian-sale semiautomatic FS2000).

    Thanks to Arex Defense for giving me access to this rifle to film, and thanks to Polenar Tactical for hosting me in Slovenia!
    ocs ocs sine ira et studio - OCSite 23.5.2023 16:56  33820
    (Jakkoli je to poněkud redundantní, znovu velice děkuji za perexy.)

    Tomu Nylonu je věnovaná hezká stať v Následcích:

    ... Tohle,“ pokračoval, zvedaje ze stojanu třetí zbraň, „je jejich nejnovější model. Říkají tomu Nylon 66. Pažba je z jediného kusu nylonu od DuPonta. Není to zvlášť hezké, ale funguje to dobře. Remington ve své reklamě uvádí, že můžete tuhle pušku přejet nákladním autem a pořád bude fungovat.“ Vzhlédl na Waltera Bowmana: „Není mi známo, že by naši zákazníci měli ve zvyku jezdit auty po svých puškách, ale kdo ví, třeba Remington narazil na dosud nepokrytý segment trhu.“

    el_diablo El_Diablo Veškerá nepodstatná elektronická zařízen - mimo provoz, včetně kontroly pravopisu. 22.5.2023 20:01  33819
    Llama M82: Gabilondo Copies the Beretta (But More Complicated)

    The Llama M82 was adopted as the new Spanish Army service pistol to replace aging Star Model B pistols. The design of the side is mechanically almost identical to a Beretta 92, while the frame and controls include a lot of DNA from the commercial Llama Omni. It was adopted in 1986, with the first military deliveries taking place in 1987.
    el_diablo El_Diablo Veškerá nepodstatná elektronická zařízen - mimo provoz, včetně kontroly pravopisu. 21.5.2023 23:40  33818
    The riot gun with the most 80s promo video ever? With firearms & weaponry expert Jonathan Ferguson

    This is very much an anti-riot gun that's had two lives. That of which it was intended from it's development in the late 70s, and then it's popular culture life as a wholly different weapon altogether.

    Join Jonathan as he examines both of these stories as well as some incredible promotional footage from the team at Enfield.
    el_diablo El_Diablo Veškerá nepodstatná elektronická zařízen - mimo provoz, včetně kontroly pravopisu. 21.5.2023 01:34  33817
    Slovenian SAR80: Sterling Out-Simplifies the AR-180

    The British Sterling firm designed the SAR-80 (specifically, their engineer Frank Waters) as a very simple rifle to sell to countries outside the main NATO/Warsaw spheres of influence. Sterling ended up getting a license to produce the AR-18 though, and didn't put Water's design into production.

    When the newly formed Chartered Industries of Singapore came looking for a rifle to produce, the SAR-80 design was a chance for Sterling to sell a production license. CIS needed something to produce domestically to equip the Singaporean Army, and the SAR-80 met their needs. After selling the rifles to their own Army, the company went looking for export clients. They found a few, including Croatia, the Central African Republic, and Slovenia. A total of about 80,000 SAR-80 rifles were made, and this is one of the Slovenian-contract examples.
    el_diablo El_Diablo Veškerá nepodstatná elektronická zařízen - mimo provoz, včetně kontroly pravopisu. 20.5.2023 23:35  33816
    Ultralight Silencer: the Carbon Research CR9

    One of the cool new products we found at SHOT Show this year was the CR9T from Carbon Research. This is a small research company that has figured out how to bond metals to carbon fiber in a way that allows them to build a complete suppressor body and baffle stack out of ultralight carbon fiber and then armor the tips of the baffles to give them long term durability. They make a .22 caliber can that weighs just 2.3 ounces, and their 9mm/.300 Blackout can is just 7.3 ounces. That is the CR9T, with titanium internal plating and kevlar integrated into he body tube for greater strength - good for 9mm and .300 Blackout. They also make the CR9A which is the same thing using aluminum, and rated for only 9mm (a 5.56mm version is currently in development).

    Carbon Research sent me two of the CR9T cans to try out, and we are taking them out to the range today. My hypothesis that they won't heat up as much as metallic cans was mostly disproven (although they do cool down faster than metal), but we had no problems running them and the light weight is really nice!
    el_diablo El_Diablo Veškerá nepodstatná elektronická zařízen - mimo provoz, včetně kontroly pravopisu. 20.5.2023 21:44  33815
    Successor to the Scout: Q's 8.6mm Fix

    There is a ton to go over in this video...I noticed the Fix when it first came out, but it didn't become really interesting to me until the version in 8.6mm Blackout hit the market. Fundamentally, the Fix is a very light, modular, and ergonomic bolt action utility rifle. In 8.6mm, I think it is a magnificent hunting weapon - virtually silent while offering excellent terminal performance with a heavy expanding projectile.

    I am going to be using this rifle with an AGM Rattler TS35-640 thermal optic in Midnight Brutality, so stick around for that video tomorrow!
    el_diablo El_Diablo Veškerá nepodstatná elektronická zařízen - mimo provoz, včetně kontroly pravopisu. 19.5.2023 20:13  33814
    Nylon 66: Remington's Revolutionary Plastic Rifle

    In the 1950s, Remington decided that it needed an inexpensive new .22 self-loading rifle to add to its catalog. In looking at how to reduce the cost of such a rifle, they hit upon the idea of using polymer to replace the wooden furniture typically used - and to replace the metal receiver as well. Remington was owned by DuPont at the time, and DuPont had developed an excellent strong polymer which they called "Nylon" - specifically, Nylon composition number 66.

    Remington engineers developed a massively complex and expensive mold to inexpensively stamp out monolithic polymer .22 rifles in the mid 1950s. They knew this design would cause concern to a large part of their market because of its non-traditional construction, and so they put the new rifles through hundreds of thousands of rounds of grueling testing. It passed these trials with flying colors, and was released in January 1959 to pretty rave reviews. By the time it was finally taken out of production in 1987, more than 1,050,000 of them had been produced - a fantastic success on a pretty big gamble.

    Thanks to Dutch Hillenburg for loan of this example to show you!
    el_diablo El_Diablo Veškerá nepodstatná elektronická zařízen - mimo provoz, včetně kontroly pravopisu. 14.5.2023 23:16  33811
    Animace12.5 inch Rifled Muzzle Loading Gun, 1885

    The 12.5 inch Muzzle Loading Gun Mark I of 1885 fired a shell weighing 820 pounds (372 kg) to a range of 6,000 yards (5,586 M). It weighed 38 tons (38,610 Kg) and was generally used as a coastal defence cannon mounted in forts. The gun could fire 3 types of shell - a Palliser armour piercing shell against armoured warships, a common explosive shell for unarmored ships and a shrapnel shell to be used against small craft and assault forces.

    The animation is based upon installation of 7 12.5 inch RML guns at Fort Nothe, Weymouth (UK), which protected Portland harbour. The fort, built between 1860 and 1872, was upgraded to mount these large guns in 1893-4. The underground magazines and shell rooms were also enlarged.

    The video shows how the very large guns were loaded, aimed and fired from within the cramped casements of the fort, and without the use of power or hydraulics. The loading drills are taken from the Handbook of the RML 12.5 inch 38-ton Gun, dated 1885, with much assistance and advice from historians familiar with the period.

    Fort Nothe is open to the public and has many interesting exhibits covering gunnery and torpedoes from the 1880’s to the 20th century.

    While this video focuses on the drill and fort, a further video is planned to show the construction of the gun and the mechanisms of the platform. Please watch this space.
    el_diablo El_Diablo Veškerá nepodstatná elektronická zařízen - mimo provoz, včetně kontroly pravopisu. 14.5.2023 22:58  33810
    Chinese Warlord C96 Carbine from Taku Naval Dockyard

    Today we are looking at a second Chinese Warlord-Era C96 Mauser carbine. These were made as fancy sporting or presentation arms for important people - just as the original Mauser-made C96 carbines were. This example was made at the Taku Naval Dockyard, a facility initially set up to maintain the Beiyang Fleet but which expanded into arms production. Based on the pair of Nationalist flags on the buttplate, this was most likely made in the late 1920s.

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