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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 22.7.2025 23:42
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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    el_diablo El_Diablo Veškerá nepodstatná elektronická zařízen - mimo provoz, včetně kontroly pravopisu. 8.8.2025 21:17  35067
    Colt SMG: First of the 9mm ARs

    With the expansion of SWAT teams throughout law enforcement in the 1980s, Colt realized that it was leaving a lot of sales on the table by not having a submachine gun it could offer alongside M16/CAR-15 rifles and carbines. They addressed this in the early 1980s by adapting a CAR-15 to 9x19mm. It used an adapter in the magazine well to fit modified Uzi pattern magazines (they were given hold-open tabs on the followers), and retained the same handling and controls as the full size AR. The SMG was made as a closed bolt, hammer fired, simple blowback action. By adding weight to the bolt carrier and buffer, the rate of fire was kept down to around 800 rpm.

    The Colt SMG never really captured wide appeal. It was reasonably successful for Colt in large part because of their ability to market it alongside rifles, but it was dogged by reliability problems. A bunch of different models were made with different fire control options, including a couple civilian semiautomatic models and the distinctive DoE “briefcase gun” and the integrally suppressed DEA model, although neither of those saw very substantial sales. Still, it remains available to this day.
    el_diablo El_Diablo Veškerá nepodstatná elektronická zařízen - mimo provoz, včetně kontroly pravopisu. 6.8.2025 18:42  35066
    Return of the AK-50

    The AK-50 is back, and we’re making it better than ever.
    el_diablo El_Diablo Veškerá nepodstatná elektronická zařízen - mimo provoz, včetně kontroly pravopisu. 6.8.2025 18:19  35065
    12 inch Siege Howitzer, 1916

    The British 12-inch Siege Howitzer was built by Vickers, as a scaled up version of their 9.2-inch Howitzer. It entered service at the Western Front in August 1916. This massive gun was broken down into 6 loads with a combined weight of 44 tons and hauled to the front lines for assembly. At the selected site, which would usually be in amongst trees, a template was pegged out on the ground and the foundation excavated by two 19-man detachments. Constructing the gun needed to be unobserved by the enemy aircraft as far as possible, so much work was done at night, and the works covered by tarpaulins. Caterpillar tracks had to be erased. The individual loads were winched across the excavation, and lowered using ratchet spanners operating on the nuts of lowering-screw threads. The first 4 loads (pivot, rear roller path, side girders and the gun carriage) were relatively straightforward to assemble in this way. The 6 ton Cradle and 9 ton Barrel were delivered on special waggons containing a winch that raised the waggon up to the level of the gun carriage, and a chain drive that slid the cradle, and subsequently the barrel, into place.

    Howitzers specialised in indirect fire - where the target was not visible from the gun position. The animation shows a (simplified) process for setting the range and bearing on the gun to engage the target. In practice, there are many more factors that need to be taken into account. For more information please look at Nigel Evans’ web site (www.britishartillery.co.uk)
    el_diablo El_Diablo Veškerá nepodstatná elektronická zařízen - mimo provoz, včetně kontroly pravopisu. 6.8.2025 17:46  35064
    East Germany's Nice .22 AK Trainer: KK-Mpi-69

    The KK-Mpi-69 (Klein Kaliber Maschinenpistole 1969) was a .22 rimfire training model of the standard East German stamped AKM. It used a simple blowback replacement bolt assembly and proprietary front trunnion along with a standard AKM receiver and fire control group. There is no gas block, since a gas piston is not used, and the sights are calibrated for short range rimfire shooting only. The magazines are standard AKM magazine bodies holding 15-round .22 rimfire magazines. Approximately 50,000 of these were made between 1970 and 1975.

    Many thanks to the IRCGN (Institut de Recherche Criminelle de la Gendarmerie Nationale) for allowing me access to film this unusual AK variant for you!
    el_diablo El_Diablo Veškerá nepodstatná elektronická zařízen - mimo provoz, včetně kontroly pravopisu. 4.8.2025 19:09  35063
    Nielsen Device: How it Works and Why it's Necessary

    The Nielsen Device is a type of suppressor mount that allows a suppressor to move forward upon firing and thus allow a recoil-operated firearms to cycle reliably despite the added weight of a suppressor. Popularized by Doug Olsen in the 1980s, they allow pistols to be readily suppressed without needing to tinker with spring strength, slide weight, and suppressor weight. They are not necessary or useful on fixed-barrel pistols, however.
    el_diablo El_Diablo Veškerá nepodstatná elektronická zařízen - mimo provoz, včetně kontroly pravopisu. 1.8.2025 18:51  35062
    Reproduction HEL-E4A Vietnam M16 Silencer by International Milspec Co

    The Human Engineering Lab's HEL-E4A was the most commonly used suppressor used in the Vietnam War. It was the result of a series of suppressor designs from the Aberdeen Proving Grounds HEL which were developed to balance suppression and back pressure, so that they could operate reliably on a standard M16 rifle. A total of 960 were sent to Vietnam in late 1968 and early 1969 (in addition to 120 earlier HEL-M4 pattern ones). Today they are extremely rare, as very few came back from the war.

    The example I am using here is a new reproduction made by International Milspec Co (Intl Mil Co).
    el_diablo El_Diablo Veškerá nepodstatná elektronická zařízen - mimo provoz, včetně kontroly pravopisu. 30.7.2025 21:54  35061
    Swedish Paratrooper Prototype: AK Fm/57

    As Sweden was looking to adopt a new self-loading infantry rifle in the 1950s, one of the contenders was a modernized version of the Ljungman. The Fm/57 is one of the last iterations of that project. It is chambered for 6.5x55mm but uses the short-stroke gas piston conversion that we previously saw on the 7.62mm NATO conversions of the Ljungman. It also uses a more refined lower receiver than its Fm/54 predecessor, with a nose-in-rock-back 20 round magazine and a folding stock. It was entered into formal trials against the GRAM-63 (another domestic Swedish design), the M14, G3, SIG 510, FAL, and AR10...which it lost.
    el_diablo El_Diablo Veškerá nepodstatná elektronická zařízen - mimo provoz, včetně kontroly pravopisu. 28.7.2025 18:48  35060
    ZK 381: Czech Pre-War Prototype Battle Rifle

    The ZK-381 was designed by Josef Koucký, his first design of 1938 (hence 381). This is one of the last of the Czech pre-war self-loading rifle projects, of which there were quite a lot. It uses a tilting bolt and a short-stroke gas piston, with ZB26 machine gun magazines and chambered for 7.92mm Mauser (although they would have been happy to offer a model in any other modern rifle cartridge). It was tested in the spring of 1938 by the Soviet Union, which liked it enough that they requested a model in 7.62x54R - and those were tested in November 1938. Ultimately domestic Russian designs were chosen instead, and tests in German, France, Spain, and Italy also led to naught.

    Thanks to the Czech Military History Institute (VHU) for graciously giving me access to this one-of-a-kind prototype to film for you! If you have the opportunity, don't miss seeing their museums in Prague:
    https://www.vhu.cz/en/english-summary/
    el_diablo El_Diablo Veškerá nepodstatná elektronická zařízen - mimo provoz, včetně kontroly pravopisu. 23.7.2025 21:49  35059
    Krieghoff's Bizarre Prototype FG42 Proposal

    When the Luftwaffe was looking for its new universal paratrooper rifle, six different German arms companies were asked to submit proposals. Only two actually did; Krieghoff and Rheinmetall. Krieghoff designed this very interesting system, clearly optimized to reduce weight and length as required by the design brief. It uses a tiny vertically traveling locking block and an unusual gas trap system combined with an under-barrel piston. The total number made is unknown, but both fixed- and folding-stock models were produced (the German museum at Koblenz has a fixed-stock example on display). This particular example appears to have been tested after the war by engineers at Springfield Armory by drilling a hole in the gas tube to measure pressure while it cycled.

    Thanks to the Springfield Armory National Historic Site for giving me access to this rare prototype from their reference collection to film for you! Don't miss the chance to visit the museum there if you have a day free in Springfield, Massachusetts:

    https://www.nps.gov/spar/index.htm

    el_diablo El_Diablo Veškerá nepodstatná elektronická zařízen - mimo provoz, včetně kontroly pravopisu. 21.7.2025 19:23  35058
    G150: Swiss Silenced Guerrilla Anti-Materiel Rifle

    The G150 is a rifle specifically assembled by and for the Swiss P-26 organization: a very secretive stay-behind group intended to fight foreign occupiers of Switzerland. It was one of a series of such organizations that began with a concern during World War Two the Germany might invade, and continued during the Cold War with the threat of Soviet occupation in the aftermath of nuclear war. The P-26 group specifically was formed in 1981, and disbanded in 1991 under a cloud of controversy over its political leanings.

    P-26 was armed with an assortment of weapons ideal for guerrilla warfare, including P210 pistols and suppressed MP5 submachine guns. The G150 rifle was intended to be a very quiet rifle for destroying enemy materiel like radar systems, fuel tanks, parked aircraft, and the like. About 250 were made using commercial JP Sauer actions, SIG 540 like pistol grips and folding stocks, and very large two-part suppressors. They were chambered for the .41 Remington Magnum revolver cartridge, loaded with a 408-grain subsonic bullet. The scopes were adjustable from 4-6 power (yes, 4-6: it;s a weird choice) and had BDC elevation turrets adjustable out to 200 meters.

    Only three G150 rifles are known today, although the remainder may still be in some deep military storage in Switzerland. Many thanks to the anonymous viewer who arranged access to this one for me to film! To see another perspective on one of the other known examples, I recommend Bloke on the Range's video:
    BotR Exclusive! Swiss 10.4mm G150 subsonic...
    el_diablo El_Diablo Veškerá nepodstatná elektronická zařízen - mimo provoz, včetně kontroly pravopisu. 19.7.2025 18:54  35057
    H&R Handy Gun: A Smoothbore Pistol Killed Off by the NFA

    The Handy Gun was introduced by Harrington & Richardson in 1924. H&R took their Model 1915 single-barrel break-action shotgun and cut it down into a handgun. It got a pistol grip and an 8” barrel, and was offered in both .410 and 28 gauge (the .410 model also able to fire some .44-caliber single-bullet cartridges). A 12” version was also made, to be legal in a few states that had length restrictions. It was advertised specifically for personal protection, probably exploiting the common belief that one need not aim a shotgun at close range.

    In 1931 H&R attempted to pivot the Handy Gun into the target pistol space, introducing .22LR and .32 S&W models with rifled barrels. These didn’t sell very well, as there were many other, better options for target pistols. A detachable wire stock was introduced in 1933, but this didn’t help much either.

    Ultimately the National Firearms Act of 1934 conclusively killed off the Handy Gun (along with similar products from other companies, like Ithaca’s “Auto & Burglar”). That law categorized smoothbore pistols as “Any Other Weapons”, and subjected them to NFA registration with a $200 tax on their manufacture and a $5 tax on their transfer. This overhead destroyed demand for the gun, and the company simply ceased to offer it commercially. It did continue to be sold in Canada until World War Two however as Canadian law did not restrict it at that time. Total production was about 54,000.
    el_diablo El_Diablo Veškerá nepodstatná elektronická zařízen - mimo provoz, včetně kontroly pravopisu. 18.7.2025 21:26  35056
    Fox .32: Police Prototype of CZ's First Pistol


    Alois Tomiška, best know for the Little Tom pistol, was one of the original founders of the South Bohemia Armory, which became CZ of Strakonice. The first pistol produced by the company was his "Fox" design a .25 ACP pocket gun. As originally designed, it used a folding trigger without a trigger guard, and had a unique sheet metal frame. The frame was made from a single piece of steel, bend in a U-shape completely wrapping around the otherwise traditional style of slide. This allowed the pistol to be made without the difficult machining process of milling out a magazine well.

    About 1500 Fox pistols of the first model were made, and the factory hoped to expand its market to police use. To that end, they made a prototype scaled up to the .32 ACP cartridge, which was the typical police caliber at the time. That is the pistol we are looking at today. It failed to generate interest, and no further production took place. It was tested by the factory in August 1921, and the project was scrapped in December of 1922.

    Thanks to the Czech Military History Institute (VHU) for graciously giving me access to this one-of-a-kind prototype to film for you! If you have the opportunity, don't miss seeing their museums in Prague:
    https://www.vhu.cz/en/english-summary/
    el_diablo El_Diablo Veškerá nepodstatná elektronická zařízen - mimo provoz, včetně kontroly pravopisu. 17.7.2025 20:53  35055
    CZ247: Experimental Swivel-Action SMG

    The CZ247 was developed for Czechoslovakia's post-war submachine gun trials, where it was pitted against the ZB47. It was a simple blowback 9x19mm SMG with a number of interesting elements, most notably the ability to fire with the magazine either vertical or horizontal. In theory, this made the gun more compact for use in a jungle sort of environment (vertical) or to allow a shooter to get much lower to the ground when shooting prone (horizontal). In practice, it really isn't very important, and requires a bit of extra complexity in the gun's design. The CZ247 also has a neat safety mechanism for preventing unintended firing and a stripper clip guide built into the stock (both of which would be incorporated in the vz.48 SMG that was eventually adopted).

    When the CZ247 failed to win the military trials, CZ got government permission to sell it on the export market. A contract for 10,000 guns was quickly obtained from Egypt, but before the guns could be shipped the export permission was cancelled by the government. Czechoslovakia opted to support Israel in its declaration of independence in 1948, and the government decided to not send weapons to Egypt which might be used against Israel. This left the guns sitting in CZ warehouses, and the basically all stayed there for a few decades. Eventually most were sold to Nigeria in 1967 and Ethiopian in 1977 - and as a result they show up occasionally in African and Middle Eastern conflict zones to this day.

    Thanks to CZ for giving me the opportunity to take this example out to film and also to shoot for you!
    el_diablo El_Diablo Veškerá nepodstatná elektronická zařízen - mimo provoz, včetně kontroly pravopisu. 17.7.2025 20:53  35054
    Roller Delay in France: The H&K 33F (Trials & Export Models)

    When France was looking to replace the MAS 49/56 rifle for military service in the 1970s, it tested all of the major rifle options available. These included the Colt M16, FN CAL, and HK33. The HK required some modification to meet French military requirements, specifically the capability to launch rifle grenades. The model 33F was developed specifically to meet these requirements - first as a modified standard HK33, and later as a factory production run. The modifications made include a reinforced magazine well, 4-position fire control gourd (including 3-round burst), a reinforced stock attachment, grenade range rings on the barrel, and a mounting bracket for a rifle grenade sight.

    Apparently the HK33F performed very well in trials, but it was ultimately deemed politically unacceptable to adopt a German rifle for the French Army (a policy which has changed now, 50 years later...). Instead, the domestic FAMAS was chosen, along with the SIG-Manurhin 540 purchased in limited numbers for the Foreign Legion.

    A second type of 33F came about from the program, however. Berlin police wanted HK33 rifles, but treaty prohibited West German arms from entering Berlin in East Germany. The loophole found was to send the parts to MAS in France, where they were assembled and marked HK33F, thus making them French origin gun which could be sent to Berlin. These rifles had none of the French grenade launching adaptations, and were completely standard HK33s except for the use of heavy barrels. MAS eventually added the G3, HK33, and MP5 to its export catalog in the late 1970s and sold quantities to a number of small countries in the French sphere of influence (including Haiti, Burkina Faso, Lebanon, and others).

    Many thanks to the IRCGN (Institut de Recherche Criminelle de la Gendarmerie Nationale) for allowing me access to film these rather rare HK variants for you!
    el_diablo El_Diablo Veškerá nepodstatná elektronická zařízen - mimo provoz, včetně kontroly pravopisu. 9.7.2025 20:19  35053
    AK fm/54: Prototype Swedish Paratrooper Rifle

    As Sweden experimented with updating the AG42 Ljungman in the 1950s, one of the intermediate patterns was the fm/54. This took the 7.62mm NATO short stroke piston conversion already developed and added a 20-round box magazine and a Carl Gustaf m/45 folding stock to it. Not a Carl Gustaf style stock, mind you, but one cut directly off an m/45.

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