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Found 14 results

  1. I haven't found an appropriate thread where to put some interesting rare stuff related to WW2 development, be it industrial one or makeshift field modifications. Let's start with two things. The first one is a relatively recently found rarity from Swedish archives - a drawing of ČKD/BMM V8H-Sv tank. The drawing and a letter was found by WoT enthusiasts in Swedish archives in 2014 (the original announcement and the drawing source is here). The drawing is from a message dated 8th September 1941. One of the reasons why this drawing was not known before may be that the Czech archives
  2. Hi as most of you know who are in the gun community a bunch of AR 70/90 kits came into the country and theirs still no barrels or receivers in production. Since I cant find anything I decided that I'm just going to make my own barrel and I've found the measurements from a guy on reddit who lives in Italy. https://imgur.com/gallery/WUtxuAP https://imgur.com/gallery/1ydhDUS As I was getting the measurements a curiosity ran through my head, how do you mathematically figure out the proper diameter of the gas port hole for the gas block in the barrel?
  3. Most automatic weapons, with the exception of really weird designs like the Madsen LMG and Hino-Komuro, have a linear reciprocating breech member; either the bolt or a bolt carrier group. This reciprocating member is supposed to move rearward (the recoil stroke) and pull the spent case from the chamber, and then rebound off of a spring to shove a new round into the chamber (the counter-recoil stroke). After the counter-recoil stroke the reciprocating mass should come to a halt in its forward-most position; the "in-battery" position. When the bolt carrier group is in battery the case is enti
  4. This came up in a recent discussion I had with a friend over Discord, concerning a hypothetical near-peer conflict (particularly in an urban environment). My friend is of the belief that in such a conflict there isn't no reason to field any small arms (not just service rifles or light machine guns) in anything larger than something like 5.56 NATO, the rationale being that a.) you can carry more of it compared something like 6.5 Creedmoor or 7.62 NATO, b.) you're mostly going to be using it suppressing the enemy so that you can drop high explosives on their heads, and c.) since most combat take
  5. Here at Sturgeon's House, we do not shy from the wholesale slaughter of sacred cows. That is, of course, provided that they deserve to be slaughtered. The discipline of Military Science has, perhaps unavoidably, created a number of "paper tigers," weapons that are theoretically attractive, but really fail to work in reality. War is a dangerous sort of activity, so most of the discussion of it must, perforce, remain theoretical. Theory and reality will at some point inevitably diverge, and this creates some heartaches for some people. Terminal, in some cases, such as all those A
  6. have question about 12.7x99 AP M2 cartridge WWII time books gives muzzle velocity for AP M2 - 895 m/s for 45in barrel, modern days firing tables and manuals gives 856 m/s for 45in barrel, which is correct, or both correct but 1st for WWII and 2nd for modern dayes cartridges ?
  7. Hi everyone, first post here I stumbled across this video : It’s super dense polyethylene with a neutral buoyancy core for impact resistance. It weights only 4 pounds, so for weight effiency it’s around 3 times better than ar550 and 4 times better than other ceramics ballistic plates, AND that’s while including the water, which I doubt add any bulletproof capabilities. Is it just me or does it sound a bit fishy?
  8. At the end of January, 2018 and after many false starts, the Russian military formally announced the limited adoption of the AEK-971 and AEK-973 rifles. These rifles feature an unusual counterbalanced breech mechanism which is intended to improve handling, especially during full auto fire. While exotic outside of Russia, these counter-balanced rifles are not at all new. In fact, the 2018 adoption of the AEK-971 represents the first success of a rifle concept that has been around for a some time. Earliest Origins Animated diagram of the AK-107/108 Balanced action recoil sy
  9. Part 3 in a multi-part series. Anglo-zulu era Boer war era. Assegais and throwing spears. African and Indian weapons jumbled together. African daggers and knives. San arrows. WW1. The ballistic vest on the top left actually caught one in combat. Percussion brown bess! This has been C&Rsenal - South Africa edition. This has been Forgotten Weapons - South Africa edition.
  10. Old-timey arms marketing videos are a great source of mirth. They're part time capsule, part content-free advertisement. I'm roughly dating this video to the early Reagan era. Operation Nimrod is mentioned and even a bit of footage from it is shown at 1:21. If you want to sell submachine guns, some sort of embassy crisis which ends in an SF raid. It worked for FN too. Curiously, the new HK G41 5.56mm rifle, which was introduced in 1981, is not mentioned. The description of the diopter sight as "easy to adjust" at 1:58 is debatable, but the idea that they're as easy to use as a sco
  11. It is time to explain The Aglockalypse. This is the handgun that killed handgun design in the West. Nobody has had any new ideas worth mentioning on the mechanical design of service handguns since this design came out. Almost every major arms manufacturer in the West makes what is materially a Glock clone; albeit with a few small embellishments and their own logo stamped on the side. What Makes a Glock a Glock? Almost every mechanical contrivance in small arms design was invented about one hundred years ago by some Austro-Hungarian noble you've never heard of or by John Moses B
  12. I recently had an opportunity to take a look at a PS90. These are the extended-barrel, semi-auto only version of the FN P90. Aside from the lengthened barrel, barrel shroud, and modifications to the fire control group, they are identical to P90s. The P90 was the correct idea at the correct time for FN Herstal. Prior to its introduction, they had been focused on the BRG-15, a 15.5mm very heavy machine gun: This potent weapon fired a monstrous 15mm, later 15.5mm round that edged out the 14.5x114mm round for raw power. The idea, as I understand it, was that Conventional Forces Eu
  13. 56K unfriendliness follows: Artistic 3D cutaway of the GSh-18 from Abiator In the early 1990s, the Russian military began looking for a replacement for the long-serving Makarov PM pistol. The Makarov, while a sound and simple design, was an old-fashioned design that could not take advantage of the latest advances in polymer and ammunition technology. A certain Austrian businessman had shown that it was quite possible to make pistol frames out of injection-molded plastic instead of laboriously milling them out of steel or aluminum, and the world had well and truly taken note. In additi
  14. Now that Weaponsman has linked the forum, I guess it's time to post actual content. No more dumb one-liners or jokes about the Turkish government's policy towards Kurds or Sherman burning down Atlanta. For at least five posts. I think that's all I can manage. The internet has been a mixed blessing for gun nuts. On the one hand, it allowed for much freer exchange of information that was previously exclusive to a few experts. The notorious mil-spec chart (no longer up to date) that circulated around ar15.com years ago is probably a big part of the reason that AR-15 manufacturers stepped
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