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Klub Zbrane [ŽP: 24 týdnů] (kategorie Věda a Technika) moderují Al, El_Diablo, ocs, themajkl.
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Domovská stránka aktualizována 2.12.2019 05:02
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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  •  Výslovně zakázány jsou pouze urážky (je jedno koho), nesmyslné hádky a extrémně vulgární příspěvky.

    Video Alova prototypového samopalu
    Early Automatic Pistol Cartridges - What, When & Why?
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    el_diablo El_Diablo Veškerá nepodstatná elektronická zařízen - mimo provoz, včetně kontroly pravopisu. 9.8.2023 19:24  33861
    Tara TM-9: What a Tangled Web of Intrigue for a Crappy Gun

    Tara Aerospace is an arms factory in Montenegro that was privatized around 2013 or 2014, and a major stake in it was purchased by one Heinrich Thomet (formerly of Brugger & Thomet, and then the basis for a character in "War Dogs"). The first firearm the new Tara produced was the TM-9, and it was not very good.

    The basic design concept is fine - it's a modern style of service pistol; polymer-framed, striker-fired, and chambered for 9x19mm. It has interchangeable grip backstraps and a rail for a light (no optics cut; it was too early for that). Where it differs most obviously from other options is the use of a true double-action-only trigger. The striker is fully forward at rest, and the trigger pull is responsible for fully cocking and then releasing it. This makes for a very long and heavy trigger, but it also simplifies the trigger mechanics and obviates the need for a manual or trigger safety.

    The first production of TM-9 pistols was not of particularly good quality, but the factory needed money and so a batch was sold to a European distributor. They were not intended to end up in the US, but did end up purchased by Century, who brought them into the country and then discovered that they basically didn't run reliably. Slides not going fully into battery was a major issue in particular. While trying to figure out how to deal with this, Century secured a deal to sell them all to Gander Outdoors, which planned to have them all overhauled by America's Gunsmith Shop. Before that was completed, though, Gander decided to just abandon gun sales entirely and sold the guns back to Century as a loss.

    Some began to get out onto the market, and American buyers were pretty annoyed at the reliability problems (not that you would know it form the generally-positive reviews in the gun press at the time). Having never intended the guns to get to the US, Tara's answer was to declare that the early production guns were actually only intended for use with "rubber bullets" and were never supposed to be sold as live guns at all (the notice is on their web site, which I cannot link to because of Youtube rules). The gun in this video is specifically listed in their warning by serial number, by the way.

    Eventually, Century sold the remaining TM-9s to Centerfire Systems, who is now blowing them out pretty cheaply, with full visibility of this backstory (for the record, I acquired this one before the sale to Centerfire). Tara, meanwhile, is trying to sell their newer and presumably better model to Century, who so far refuses to buy any until the "rubber bullet" warning nonsense is removed form Tara's web site.
    el_diablo El_Diablo Veškerá nepodstatná elektronická zařízen - mimo provoz, včetně kontroly pravopisu. 7.8.2023 19:55  33860
    Yugoslav M57: Tito's Tokarev



    Yugoslavia purchased both 1895 Nagant revolvers and TT33 Tokarev from the Soviet Union after World War Two, but this was only a holdover until domestic pistol production could begin. While Yugoslavia was formally communist, Tito was not a puppet of Moscow, and Yugoslavia did their own development to reverse-engineer the Tokarev pistol. In the process, they made a number of improvements to the design, resulting in the M57. Serial production began in 1963 and lasted until 1982, with about 270,000 made in total. It was the standard sidearms for the Yugoslav People's Army and Yugoslav police forces until 1988.

    The changes made from the standard Soviet pattern Tokarev include:
    - Longer grip and 9-round magazine capacity
    - Captive recoil spring
    - Improved front sight
    - Stronger firing pin with improved retention system
    - Magazine disconnect safety
    el_diablo El_Diablo Veškerá nepodstatná elektronická zařízen - mimo provoz, včetně kontroly pravopisu. 4.8.2023 19:41  33859
    Prototype Hungarian 33M Bolt Action Rifle



    When Hungary separated from the Austro-Hungarian Empire after World War One, it began to slowly rebuild its military equipment. The eventually led to carbine conversions of old M95 rifles using the new 8x56mm rimmed cartridge, which were designated the 31M. However, the Hungarians were not satisfied with the Mannlicher straight-pull system. In cold conditions during the war, these rifles had sometimes become very difficult to operate, as the grease in their bolts solidified at low temperature. Hungary wanted to adopt a new turnabout rifle, and the 35M was eventually chosen. Building up to that, however, was the prototype 33M design.

    The 33M was a rifle with a lot of fine machining and expensive, sometimes delicate, features. It used a sliding dust cover on the bolt that never would have survived field conditions. It also had a quite large oil bottle in the buttstock, accessed by pivoting the whole buttplate off to one side. Eventually the most egregious of the fancy bits would be removed, and the resulting 35M adopted by Hungarian forces (and later adapted to 8x57mm as the 43M and G98/40 for German troops).

    Many thanks to Joschi Schuy for giving me access to film this extremely rare rifle!
    el_diablo El_Diablo Veškerá nepodstatná elektronická zařízen - mimo provoz, včetně kontroly pravopisu. 3.8.2023 00:20  33858
    Yugo-Albanian "Marksman's" Mystery AK

    This rifle was brought back to France from the Balkans (probably Kosovo) by a French military team in the late 1990s. It's a neat example of a mix-master build (what is "bubba" in Albanian?), with several cool elements. The base gun is an Albanian AKM, with its bayonet missing. The front sight block has been replaced by a Yugoslav M70 or M72 type, and a Yugo M72 bipod added. To allow the bipod to fit on the short barrel when folded, the handguard has been relieved to accommodate the bipod feet. The rear sight is a windage-adjustable PRK type, but this is not useful thanks tot he taller integral rear sight on the top cover. That top cover is from a long-action Finnish Valmet, made with a Weaver scope mount rail. The scope used on this rifle is a ZRAK ON-76, a 4x optic form an M76 rifle, and it still has the 8mm Mauser BDC cam installed.

    Many thanks to the French IRCGN (Criminal Research Institute of the National Gendarmerie) for generously giving me access to film this unique specimen for you! They maintain an extensive firearms reference collection as part of their mission to fight crime and international terrorism.
    el_diablo El_Diablo Veškerá nepodstatná elektronická zařízen - mimo provoz, včetně kontroly pravopisu. 31.7.2023 19:47  33857
    "Made for the Republic of China": Shanghai Arsenal's FN 1900 Copy
    The Shanghai Arsenal was founded in 1865 as a joint venture between British and Chinese customs officers. They bought a defunct American ironworking company and rebuilt it as an arsenal. In 1884 they began production of a copy of the Remington Rolling Block, and by 1891 copies of Mannlicher 1888 straight-pull rifles. In 1912 the arsenal had more than 5,000 employees, and produced steel for industrial use and a substantial amount of rifles and ammunition. It was one of the premier arsenals in China, and Shanghai was a vibrant and growing city. The arsenal operated until the Japanese occupation of Shanghai in 1932, when most for he tooling was evacuated to other arsenals.

    The copy of the FN 1900 made at Shanghai was an excellent copy, not at all like the stereotypical artisanal Chinese pistols. They were made form 1916 until 1921, and some sources (Bin Shih) suggest that as many as 60,000 were made in 1920 alone. Markings on these guns include serial numbers on the right side, a left-side grip panel marking saying “Shanghai Arsenal” and a right-side grip panel with the date of production based on the 1911 Chinese Revolution. This examples is from the 8th year, which would be 1919.
    el_diablo El_Diablo Veškerá nepodstatná elektronická zařízen - mimo provoz, včetně kontroly pravopisu. 28.7.2023 22:37  33856
    Stocked Pistols: Great or Garbage?
    Stocked pistols: they have been around as long as pistols have been around, but are they really all that useful?
    el_diablo El_Diablo Veškerá nepodstatná elektronická zařízen - mimo provoz, včetně kontroly pravopisu. 26.7.2023 21:38  33855
    Al Kadesih: Iraq's Exceptionally Rare Dragunov Copy
    The Al Kadesih (also sometimes spelled Al Kadesiah or Al Qadisiyah) is an Iraqi copy of the SVD Dragunov DMR/sniper rifle. It is not an exact copy, though, as it uses an AK-style stamped receiver and trunnions in combination with the fire control system and short-stroke gas piston of the SVD.

    The rifles were made at the eponymous Al-Quadisiyah Establishment in Iraq, a small arms factory set up with Yugoslav assistance to make small arms. That factory produced a copy of the Yugoslav M70 called the Tabuk as well as other weapons. Rather than completely reverse-engineer the SVD, they adopted the M70/AKM design to do the job. Production appears to have run from 1988 until 1991, with another batch made in 2003 before the US invasion. The total number made is unknown, but certainly only a few thousand. The rifles appear to have been as much for presentations and gifts (gold plated ones, specifically) as for combat use, and they are very rare to see in combat photos.

    el_diablo El_Diablo Veškerá nepodstatná elektronická zařízen - mimo provoz, včetně kontroly pravopisu. 22.7.2023 19:20  33854
    SIG M18: New USMC Service Pistol (and Little Brother of the M17)

    The SIG 320 was adopted by the US Army as its new M17 full-size service pistol, but that was only have of the Modular Handgun System. The other half was the M18, a compact version of the same pistol, with a 3.9" barrel (compared to the 4.7" barrel of the M17). The Army did also adopt the M18 for MP and CID personnel, but the other service branches chose to go with the M18 as their standard sidearms. Notably, this includes the Marines, who will be using the M18 to replace the M9, M9A1, M007 (Glock 19M) and M45A1 (1911).

    Being a highly modular design, the M18 uses the same basic fire control module as the M17, as well as the same magazines. The slide and grip module are shorter to match the shorter barrel, and multiple different sizes of grip module are available to reasonably fit anyone between the 5th and 95th percentile of hand size.

    While the initial batch of M17s were made with tan controls and subsequently returned and sold on the civilian market, no M18s appear to have been returned from service. However, SIG continues to run the military M18 production line making "contract overrun" pistols exactly to military specification, and that is what we are looking at in today's video. These have TC serial number prefixes, along with other military features:

    Single-screw optics plates
    Braided recoil springs
    Tool-based takedown
    Military slide markings
    el_diablo El_Diablo Veškerá nepodstatná elektronická zařízen - mimo provoz, včetně kontroly pravopisu. 21.7.2023 22:54  33853
    Otterup Model 69: From German Sword to Danish Plowshare


    The Schultz & Larsen company in Otterup, Denmark was a venture formed by a gunsmithing shop and a very successful target shooter to make precision rifles. In 1919, they are able to purchase a bunch of German arsenal tooling for pennies because of the Treaty of Versailles. They made a number of rifles, both military and sporting, in the 1920s and 1930s. In the aftermath of World War Two, they turned to using surplus German K98k rifles as the basis for hunting and precision sporting rifles. They make a series of different models (1952, 1958, and ultimately 1969) with various improved features.

    The model 1969 is the final version, which uses a German bolt and receiver fitted with a heavy new barrel (typically in 6.5x55mm), a new stock with a significant pistol grip (similar to the Swedish CG63), a very nice Danish target trigger, and a set of precision aperture sights. The rifles were a staple of Danish competition shooters for several decades.
    el_diablo El_Diablo Veškerá nepodstatná elektronická zařízen - mimo provoz, včetně kontroly pravopisu. 17.7.2023 23:09  33852
    Krešimir: Croatia's Truly Insane Grenade Launcher
    el_diablo El_Diablo Veškerá nepodstatná elektronická zařízen - mimo provoz, včetně kontroly pravopisu. 16.7.2023 21:04  33851
    Animace12.5 inch RML Technical Details
    Some notes on the technical features of the 12.5 in 38 ton Rifled Muzzle Loaded gun from 1885, covering the mechanism in the gun carriage and fitted to the platform. The method of building the gun from wrought iron rod and constructing it using concentric coils to pre-stress the inner parts are illustrated in concept - there is no guarantee that the actual machinery used at the time bear any resemblance to that shown in the movie - concepts only. Gun design is covered briefly, concentrating on showing how internal pressure was measured using crusher gauges fitted to test guns. Finally, a method of measuring muzzle velocity is shown, and a hint given for the mathematics needed to calculate velocities at different ranges, which in turn resulted in range tables used for actual firings.

    When watching this animation, bear in mind the technology available at the time. No computers , no electronics, rudimentary electrics (wet cell batteries). So measuring time (for muzzle velocity) used the known constant - gravity. Electric motors would be subject to speed variations depending on the state of the batteries. However, the level of mechanical skills were impressive. Machinery capable of finishing to an accuracy of a few thousandths of an inch on rotating masses weighing several tons were available, as were the artisans. Even more impressive was the level of mathematical skills needed to calculate the stresses that would be experienced in a gun, to determine the thickness of the coils, and the actual dimensions to be machined so that outer coils would shrink onto inner coils and so pre-stress them, while at the same time expanding sufficiently so that heated outer coil could be slipped over an inner component. Range tables were calculated laboriously by hand or with primitive calculating machines.

    The other thing to note is that these guns were still using Gunpowder - an explosive. The Mark 1 gun used pebble powder - gunpowder compressed into small cubes in an attempt to slow down the explosion and so reduce the rate of gas generation. The Mark II gun would use Prismatic gunpowder, where the explosive was formed into larger prisms, slowing down the rate of burning still further but also requiring a longer barrel to ensure all the powder was burnt before the shell left the barrel.
    el_diablo El_Diablo Veškerá nepodstatná elektronická zařízen - mimo provoz, včetně kontroly pravopisu. 15.7.2023 16:22  33850
    Slovenian Modularity: Perun X16 "PDW" in .300 Blackout

    I was first introduced to the Tinck Arms Perun X16 at Lynx Brutality 2022 in Slovenia, and it is an interesting system emphasizing modularity and simple disassembly. I opted to use one (a 5.56mm carbine) at Lynx Brutality 2023 this year, and it ran perfectly for me. So I figured we should take a look at the version that is available in the US.

    The US distributor is AEA Arms. and they offer both complete guns and also upper assemblies. For the complete guns, they adapt Kaiser USA polymer lowers (which is pretty easy). What I have today to look at is a "PDW" variant - a 7.5" barrel in .300 Blackout, with a Riflespeed adjustable gas block. Predictably, it also ran without any problems...
    el_diablo El_Diablo Veškerá nepodstatná elektronická zařízen - mimo provoz, včetně kontroly pravopisu. 14.7.2023 16:57  33849
    The Rarest Chassepot: Rifle for the African Cavalry

    The rarest pattern of factory-made Chassepot is the fusil modèle 1866 pour la cavalerie d'afrique - the Model 1866 rifle for African cavalry. Just 12,000 of these were made by St Etienne in the spring of 1869, as a way to equip the mounted French troops in Algeria with the new needlefire rifle that the rest of the Army had. After some field testing with standard Mle 1866 Chassepot rifles, it was determined that really all they needed was a change in sling position, so that riders could carry the weapon slung diagonally across the back. To do this, a number of changes were made to the rifle. The stock was strengthened, reinforced at the trigger guard, the rear sling swivel moved to the trigger guard, and a wider third barrel band added with the front sling swivel.

    After the Mle 1866 cavalry carbine went into production in 1870, the need for these specialized rifles disappeared. No more were made, and as they were worn out they were rebuilt into standard configuration Mle 1866 infantry rifles. Very, very few survive today, and I'm and very excited to have this one to show you!
    el_diablo El_Diablo Veškerá nepodstatná elektronická zařízen - mimo provoz, včetně kontroly pravopisu. 12.7.2023 23:51  33848
    New Springfield Echelon: Croatia's Chassis System Pistol

    The Springfield Echelon pistol was released today, and it's a significant step forward for Croatian manufacturer HS Produkt. In an effort to appeal to new military and police tenders as well as introduce a forward-looking new design, the company has brought out a pistol based on a serialized chassis like that of the SIG P365 and P320. HS Produkt recognized that their previous design (the XD and XD-M in the US and the HS2000 and HS9 in Europe) was falling behind. Its grip safety was getting it rejected from a lot of major tenders, but rather than just made a new versions without that element, they chose to move to a whole new platform. Work began about 2 years ago, and it is now ready for market.

    For now, the Echelon is available only in this basic configuration, although that does include a lot of premium features - light rail, ambi controls, tritium front sight, and an optics mounting plate. A threaded barrel is also available separately. In the future, I have no doubt we will see a wide variety of other configurations from subcompact to oversize competition models - that is one of the core strengths of the chassis system, after all.
    el_diablo El_Diablo Veškerá nepodstatná elektronická zařízen - mimo provoz, včetně kontroly pravopisu. 11.7.2023 20:52  33847
    Ungentlemanly Weapons! WW2 Secret Agent Special Guns
    Special Operations Executive produced a series of ingenious firearms for use in Occupied Europe, including the Welrod and little known Welwand. Described by SOE as 'murder weapons', they were often used to assassinate enemy personnel and collaborators.

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