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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 04:02
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?
    Cowboys



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    Nemáte právo psát do tohoto klubu.

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    el_diablo El_Diablo Veškerá nepodstatná elektronická zařízen - mimo provoz, včetně kontroly pravopisu. 16.8.2024 19:47  34380
    Animace 12.5 inch RML on Special Small-Port Mounting, Fort Delimara, 1885

    Some British coastal forts were built in critical positions - and as a result would be primary targets for an attacking force. In addition to thick walls, it was necessary to minimise size of the gun-port openings to reduce the risk of shell or small arms fire entering the gun bay. However, a small gun port would restrict the elevation and depression possible from a conventional gun carriage. A special gun carriage was designed that allowed the gun itself to be lifted in its carriage up to 14 inches. This movement allowed the gun to be elevated to 7 degrees and depressed by 4 degrees.

    Forts that were equipped with small-port carriages and platforms were Plymouth Breakwater Fort, Fort Cunningham, Bermuda and Fort Delimara, Malta.

    The 12.5 inch 38 ton RML gun was a mainstay of British coastal artillery in the 1880- 1904 period - powerful enough to combat the major armoured warships of that period. Coastal forts had to depend on Muzzle Loaded guns - they were cheap, reliable, effective, and packed a big punch. While large breech loaded guns entered service in the Royal Navy in 1882, these guns required steam powered hydraulic systems to open the breech, ram the heavy shells, training and elevating. Coastal forts rarely had any powered systems so instead relied on human muscle power.

    This video illustrates the 12.5 inch, 38 ton Rifled Muzzle Loaded gun on a small-port carriage at Fort Delimara. The fort is dug into a high cliff at the entrance to the harbour of Marsaxlokk, an important sheltered deep-water port on the south east end of the main island of Malta.

    The gun drill is similar to my earlier video for the 38 ton gun at Fort Nothe, Weymouth, but shows the operation in a more confined space, the mechanism needed to raise and lower the gun trunnions in its carriage, and also how extra protection was provided by adjustable rope mantlets.

    For further details on the Platform mechanisms, training and running back please look at
    • 12.5 inch RML Technical Details
    el_diablo El_Diablo Veškerá nepodstatná elektronická zařízen - mimo provoz, včetně kontroly pravopisu. 16.8.2024 18:36  34379
    The Experimental SOE Welrod MkI Prototype

    The Welrod was a program to develop a silent assassination pistol for British SOE (Special Operations Executive) late in 1942. It needed to be chambered in the .32 ACP cartridge, be effective to a range of 15m, and have its firing not recognizable as a firearm at 50m distance. The project was led by Major Hugh Quentin Reeves, who developed much of SOE's inventory of gadgets.

    The Welrod concept was ready in January 1943, and it was not quite the Welrod that we recognize today. This initial MkI design used a fixed internal 5-round magazine and a thumb trigger, along with a rifle style bolt action mechanism. Samples were produced in April 1943, and testing showed that it was rather awkward to use. A MkII version was quickly developed in June 1943 with a more traditional style of grip and magazine, and formal trials led to the adoption of that MkII design. Incidentally, this is why the first Welrod produced was the MkII, and the later production version in 9mm was designated the MkI (it was the first mark of 9mm Welrod).

    Eventually many thousands of Welrod pistols were manufactured, and they almost certainly remain in limited use to this day. This example we have today is the only surviving MkI example, however.
    el_diablo El_Diablo Veškerá nepodstatná elektronická zařízen - mimo provoz, včetně kontroly pravopisu. 16.8.2024 18:10  34378
    R20 "Rahe" - Estonia Modernizes its Infantry Rifles


    In 2017, the Estonian military began the process of replacing its infantry rifles. At that time, the primary rifle in use was the Galil, which had been purchased from Israel shortly after Russian occupation ended and Estonia regained its independence in 1992. The Galils had made sense at the time, but now something more modern was desired. Specifically, a pairing of a 5.56mm infantry rifle and 7.62mm DMR rifle which shared the same basic platform. All of the major players in the firearms market responded to the initial Estonian RFP, and from eleven initial proposals the three finalists were H&K (with the 416), Sig (with the 716), and LMT (with their piston-driven MARS).

    Combining the factors of reliability & accuracy, cost, warranty, and included accessories, the LMT was the winning bid. In 2019 a contract was signed for the purchase of about 20,000 5.56mm rifles and about 1,000 7.62mm DMR rifles. These were designed the R20 "Rahe" ("Hail"), and the standard configuration had a 14.3" barrel (a 12.5" barreled carbine was also included in small numbers). The standard setup is a red dot sight (initially Vortex; but later and more typically Holosun 515), LMT flip-up iron sights, and Blue Force Gear V-Tac sling. Option accessories that the Estonian MoD procured include LMT 40mm underbarrel M203 type grenade launchers, Holosun 3x magnifiers, Holosun IR light/laser units, and GSL 7.62mm multi-caliber suppressors. The rifles have monolithic upper receivers and detachable barrels (though barrel swapping is considered an armorer task and not a soldier's task).

    The R20 deliveries were completed by the end of 2023, and this now represents the standard weapon for the Estonian Defense Forces. With it, they have a truly modern and capable infantry rifle capable of handling all modern missions and accessories.

    Thanks to the Supply Battalion of the Estonian Defense Forces Support Command for giving me access to film the new R20 rifles as well as some of their older firearms!
    el_diablo El_Diablo Veškerá nepodstatná elektronická zařízen - mimo provoz, včetně kontroly pravopisu. 16.8.2024 17:55  34377
    CZ's New P09 Nocturne: DA/SA Polymer Frame Now With Optics


    CZ has just released their new P09 Nocturne pistols, an update to the previous P07/P09 pairing. These guns fundamentally go back to the classic CZ-75. While that was (and still is) a very popular design, military and police tenders more recently have required more modern elements. So in 2007 the P07 Duty was released; essentially CZ75 mechanics with a modern look and a polymer frame. This was only offered as a compact model, until in 2009 the design was overhauled. At that point, the compact remained the P07 and a full size companion piece was released as the P09.

    Now, the design has been updated again, as the P09 Nocturne. The compact is the P09C and the full size is the P09F, and both come with optics cuts as standard. They are only compatible with the mini-red dot patterns however, as the internal firing pin safety in the slide limits the amount of material that can be removed for the optic. For individuals and agencies who want a modern DA/SA system (with either decocted or manual safety), the P09 Nocturne is now an option with all the modern features.
    el_diablo El_Diablo Veškerá nepodstatná elektronická zařízen - mimo provoz, včetně kontroly pravopisu. 10.8.2024 19:01  34376
    Pump-Action AK: Romanian PAR-3 (How Not to be an "Assault Weapon")

    Between 1994 and 2004, there was a national "assault weapon" ban in place int he United States, along with some related importation restrictions on military-looking rifles. Most semiauto rifle importation continued by adjusting various cosmetic features to not fall under the provisions of the various rules, but at one point someone realized that hey, the law only covered semiautomatic rifles. So if the gas system were replaced by a manual pump action, a rifle would no longer be prohibited regardless of its other features! As so, in 2002, the Cugir factory complex in Romania produced the PAR-1 (in 7.62x39mm) and PAR-3 (in 5.56x45mm). About 2000 were imported by Century, where they were not particularly popular (because they are really pretty kludgy rifles) and no further importation was done (and the PAR-2 in 5.45x39mm was never brought in at all).
    el_diablo El_Diablo Veškerá nepodstatná elektronická zařízen - mimo provoz, včetně kontroly pravopisu. 9.8.2024 19:56  34375
    Hunting in Communist Romania: Nicolae Ceaușescu's Finnbear 61

    Nicolae Ceaușescu ruled România through much of its communist period, from 1967 until 1989. Ceaușescu was a passionate hunter, and owned more than 100 firearms, mostly for hunting. These included some gifts from foreign dignitaries, but also plenty of more humble examples. Under his rule, conservation was actually fairly well done in Romania, and hunting was possible for the regular folk. Today we are taking a look at one of his personal rifles, a Sako Finnbear 61...

    Thanks to MP Armory and A.N.C.A., the Romanian national firearms collectors' association, for making this video possible!
    https://www.anca.com.ro
    ocs ocs sine ira et studio - OCSite 7.8.2024 20:01  34374
    (Dík, zajímavé! Různé Lorenzonky znám, ale tohle jsem nevěděl.)
    el_diablo El_Diablo Veškerá nepodstatná elektronická zařízen - mimo provoz, včetně kontroly pravopisu. 7.8.2024 18:41  34373
    Kalthoff 30-Shot Flintlock: The First Repeating Firearm Used in War (1659)

    The first repeating rifle used in combat by a military force was a flintlock system developed by the Kalthoff brothers. It was adopted in the 1640s by the Danish Royal Guard, who purchased a bit more than 100 of the guns, and used them successfully in the Siege of Copenhagen in 1659. The Kalthoff is a .54 caliber flintlock rifle with a magazine of 30 balls under the barrel and a powder storage compartment in the buttstock. A lever under the action is rotated forward 180 degrees and then back to completely reload the rifle - this action loads a ball into the chamber, seats it fully in place, loads powder behind it, primes the pan, cocks the hammer, and closes the frizzen. This was an amazing amount of firepower in the mid-1600s, and the mechanism in the gun is brilliant.

    The Kalthoff brothers (Peter, Mathias, Caspar, Henrik, and William) spread out across Europe working for many royal courts although it was in Denmark where their gun saw the most substantial military use. The system would lead to other repeating flintlock designs like the Lorenzoni, but these did not really meet the quality of the original Kalthoffs (in my opinion). However, the system was very expensive to make and rather fragile to use. By 1696 the Danes had taken them out of service in favor of simpler and more durable designs. Kalthoffs today are very, very rare, and it was an incredible privilege to be able to take this one apart to show to you. Many thanks to Jan, its owner, for letting me do that!
    el_diablo El_Diablo Veškerá nepodstatná elektronická zařízen - mimo provoz, včetně kontroly pravopisu. 5.8.2024 20:39  34372
    WF-51: A Swiss Intermediate-Cartridge Copy of the FG-42

    After World War Two the Swiss needed a new self-loading military rifle to replace their K-31 bolt actions. Two major design tracks followed; one being a roller-delayed system based on the G3 at SIG and the other being a derivative of the German FG-42 at Waffenfabrik Bern. Bern, under the direction of Adolph Furrer, had been experimenting with intermediate cartridges since the 1920s, and they used this as a basis to develop an improved FG-42 using an intermediate cartridge (7.5x38mm). The program began in 1951 and went through about a half dozen major iterations until it ultimately lost to the SIG program (which produced the Stgw-57).

    Today we are looking at one of the first steps in the Bern program, the WF-51. The most substantial change form the FG42 design here is the use of a tilting bolt instead of a rotating bolt like the Germans used. It is a beautifully manufactured firearm, and a real pleasure to take a look at...
    ocs ocs sine ira et studio - OCSite 2.8.2024 21:38  34371
    ... „Přesně tak. Takže jakákoli pistole která je jako celek kratší než... něco, nevím teď z hlavy přesně co, se nesmí dovážet. Tvůj Smith s dvoupalcovou hlavní je rozhodně malinko kratší. Přesně stejný revolver s třípalcovou je v pořádku.

    Takže dovozci sem navezou třípalcové revolvery a také krabici samotných dvoupalcových hlavní. Navzájem je prohodí a zpátky vyvezou ty třípalcové, aby to celé mohli pohodlně zopakovat.“

    „To je ta nejabsurdnější věc, jakou jsem kdy slyšel.“

    Henry se nevesele uchechtl. „Tak to's ještě nečtl většinu současných zákonů o zbraních. kamaráde.“

    [Nezamýšlené následky]

    el_diablo El_Diablo Veškerá nepodstatná elektronická zařízen - mimo provoz, včetně kontroly pravopisu. 2.8.2024 18:06  34370
    How Companies Bend US Import Laws (An Example)


    Part of the 1968 Gun Control Act in the US put restrictions on importation of small handguns. These rules intended to protect US manufacturers and prevent people from having access to particularly inexpensive and concealable firearms, and these rules remain in place today. In particular, revolvers with barrels less than 3" long are prohibited form importation. So how is it that we have Brazilian-made Taurus revolvers with 2" barrels (among many other examples)? Well, today we have a factory oversight from Taurus that lets us see behind the curtain...
    el_diablo El_Diablo Veškerá nepodstatná elektronická zařízen - mimo provoz, včetně kontroly pravopisu. 1.8.2024 19:35  34369
    The FINISHED AK-50


    The AK-50 is back in black. Showing off the new paint job, and some design improvements making this truly a great looking and functioning rifle!

    Thanks to TacPack for helping make this video happen! Check them out and use code “AKGUY” to get your free bonus box! www.tacpack.com

    Thanks to SDI! Again, it’s SDI.edu for more info!
    el_diablo El_Diablo Veškerá nepodstatná elektronická zařízen - mimo provoz, včetně kontroly pravopisu. 31.7.2024 23:33  34368
    How the RPG-7 Actually Works

    This 3D video explainer is about the history, mechanics, operation, and functionality of the Soviet Union's most feared weapon system, the RPG-7.
    el_diablo El_Diablo Veškerá nepodstatná elektronická zařízen - mimo provoz, včetně kontroly pravopisu. 31.7.2024 22:16  34367
    RT20: Croatia's Insane Kludged 20mm Anti-Materiel Rifle

    During its Homeland War, Croatia manufactured a wide variety of ad-hoc firearms including a number of anti-materiel rifles. The RT-20 was the largest of these, and its development began with the discovery of a stash of Yugoslav M55 anti-aircraft cannon barrels chambered for 20mm Hispano in a warehouse. These barrels were cut down, fitted with single-shot bolt actions, bipods, and bullpup stock assemblies and became the RT-20s. The most unusual element of the design is the use of gas vents about halfway down the barrel which open into a hollow tube which vents over the shooter's shoulder. This creates a gas exhaust jet upon firing to help counteract recoil (and also reducing the muzzle velocity by about 25%). The recoil from firing is still pretty brutal, but the guns can be used - and were during the war for Croatia's independence. A few remain in Croatian police inventory today...

    A big thanks to the Croatian Police Museum (Muzej Policije) in Zagreb for giving me access to film this rare piece for you! Check them out at: https://muzej-policije.gov.hr
    el_diablo El_Diablo Veškerá nepodstatná elektronická zařízen - mimo provoz, včetně kontroly pravopisu. 29.7.2024 19:17  34366
    Colt 608: The AR15 as a Pilot's Survival Rifle

    As part of its effort to build out the AR-15 family of small arms, Colt introduced the Model 608 in 1965. This was intended to be an aircraft survival rifle, able to pack disassembled into a small space with four 20-round magazines for use by the US Air Force. With a 10 inch barrel, fixed tubular stock, and cut down grip it weighed just 4.75 pounds and had a maximum length of just 17.6 inches when disassembled. It was only produced as a prototype, with ten or fewer being made in total.
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