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The Rat posted:I just had to post this somewhere. quote:Everything you can expect from an SKS, reliable, accurate, stainless-steel lined barrel. At least it's not one of those gosh darn aluminum chambers: http://thefiringline.com/forums/showpost.php?p=3323697&postcount=39 posted:Delta guys tell me of shooting a round and then having to extract the casing with a cleaning rod while on the Street Without Joy. The aluminum chamber caused problems as it would pit and when the shell fired it would fill the pit holes and the extractor could not get the shell out.
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| # ¿ Feb 25, 2009 15:23 |
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| # ¿ May 25, 2013 12:48 |
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The Rat posted:Yeah, that's the part that really made me No, it makes you a good businessman. The people who are buying at these prices clearly want to pay that much for the gun; nobody's forcing them. The only people we can be mad at for the prices are the panic buyers.
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| # ¿ Feb 28, 2009 20:49 |
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. Although I suppose I shouldn't be complaining that much; I sold a Yugo SKS in an ATI folding stock for $240 there.
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Roundboy posted:*sigh* does gunbroker *ever* have a great deal on things ? I got a great deal on my Mini-14 off Gunbroker.
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| # ¿ Apr 21, 2009 03:26 |
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Pitch posted:So... does he think reducing the mass of the slide is a good thing? It can be in some applications. A lighter slide requires a lighter recoil spring to cycle, so during both spring compression and when the slide slaps the frame, less force is transmitted to the gun, thereby reducing perceived recoil.
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| # ¿ Apr 29, 2009 16:55 |
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Pitch posted:But a lighter slide on a lighter spring will still be absorbing the same force from the ignition, requiring more rearward motion to damp it. I assume something bad will happen if your sprung mass requires more rearward motion than the frame allows. You'd probably want to pair it with a reduced-radius firing pin stop and a beefed-up mainspring to eat up some of that momentum early on. Or maybe shorter slide life is considered acceptable in race guns. I've never looked much into the racegun side of 1911s, although talking with some guys from STi indicates that they really understand 1911 dynamics.
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| # ¿ Apr 29, 2009 17:06 |
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Linux Republican posted:Wouldn't this only be the case on something blowback operated? In recoil operation, the force with which the slide is moving back should be affected more by the mass of the slide itself once it unlocks. It's not being operated by the force from the ignition directly, it's being operated by the recoil energy generated when the bullet leaves the barrel. Once it unlocks, the rearward energy is based on the inertia of the slide. Wouldn't the excess energy be transferred to the frame when the barrel is cammed down? Right. The momentum of the barrel and slide together equal the momentum of the bullet leaving the barrel (minus a smidgen that is transferred to the frame due to the off-center barrel). The source of the slide+barrel motion is simple conservation of momentum. When the barrel cams down and hits the vertical impact surface in the frame, the portion of the momentum equal to the velocity of the system times the mass of the barrel (minus whatever has been changed from kinetic to potential energy in the recoil and mainsprings) goes with the barrel. The mainspring is relatively heavy (Colt spec calls for 23 pounds) and is recocked at a good deal of mechanical disadvantage to the slide, so it's a great place to ditch a bunch of slide/barrel kinetic energy right off the bat. And because the kinetic energy is being redirected into a spring, the effect is usually perceived as reduced recoil.
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| # ¿ Apr 30, 2009 01:15 |
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Crowley posted:How good/bad are Norincos anyway? The receivers are dimensionally awesome and made of a great grade of steel. Small parts suck, the barrel is okay, and the bolts are usually crap. This is all what I've been told; I have no personal experience in this regard. Edit: To clarify, the way the small parts suck is due to dimensional inexactness and incorrect hardening. Bolts are often found that are too soft and/or have angled locking lugs. Fang fucked around with this message at Dec 21, 2009 around 23:46 |
| # ¿ Dec 21, 2009 23:25 |
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Gewehr 43 posted:Some of us just don't get anything from shooting AR's. Don't you know that you have to like things other people like?
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| # ¿ Apr 14, 2010 21:35 |
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Cyrano4747 posted:I don't know as much about how pistols wear as rifles, but on rifles at least throat and muzzle erosion start to impact accuracy long, long before the wear on the rifling is bad enough to be noticeable to the naked eye. That doesn't happen nearly as much when you're not dealing with high-pressure bottlenecked rounds. 1911s will generally keep good accuracy until the rifling wears down (provided the barrel doesn't shoot loose, of course). I don't know if this continues to apply when dealing with higher-pressure rounds like 9mm or .40 S&W, but I bet it does.
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| # ¿ Apr 15, 2010 15:05 |
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infrared35 posted:HKs, too. Metallurgy has improved a lot. Usually, when people talk about the "superiority of modern firearms  ," they don't know what they're talking about; however, when it comes to the things we can do with metal now, modern techniques have definitely surpassed what came before. That's why I have to roll my eyes when crusty old types get huffy about only settling for forged USGI surplus parts. Sure, it's forged--but it's a forging from fifty years ago. It's not guaranteed to be categorically superior to a modern cast equivalent.
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| # ¿ Apr 15, 2010 19:26 |
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Cyrano4747 posted:How do you notice barrel steel behaving? The steel is very much better than it used to be. 1911 barrels used to be matched with the slide by hand-fitting them to the point that at least one lug engaged to full depth, then firing a proof round. The pressure of the proof round would smoosh the metal in the lugs until all three lugs engaged, at which point it would be strong enough to suffer no further deformation. Nowadays, factory drop-in barrels usually only have partial engagement on a single lug, and they handle thousands of rounds without deformation. Quality of heat treatment may also be a factor: We can control that a lot better now due to better measurement and heating mechanisms, which allows us to make metal harder without as much risk of brittleness or burning the metal. Better tools might help, too, by permitting more precise bore dimensions and crisper edges on the rifling. Obviously, there's variation in steel strength quality between modern barrels. I once reamed and scraped the barrel ramp on both a $200 Kart match barrel and a cheap no-name barrel in short succession, one right after the other and the difference in hardness was palpable.
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| # ¿ Apr 15, 2010 21:31 |
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Motronic posted:Well....it sounds bad when you say it like that. Part of the proofing process was designed to cause plastic deformation to a couple of engagement lugs that were specifically designed to deform in a manner that causes secure engagement. This isn't all that uncommon today in lots of mechanical fitting procedures (non gun related). What's also cool is that the 1911 slide bows upward under pressure, with the front and rear end both tipping down about the point of the breech face. This is why the most common point for the slide to crack is at the rear of the ejection port. I was talking to Dan Coonan at SHOT a couple years back and he mentioned that one of the problems he had to solve with his 1911-style .357 autoloaders was binding of the slide at the start of recoil due to how much it was flexing.
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| # ¿ Apr 16, 2010 15:30 |
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chairface posted:There was an AR-18 that's been repeatedly relisted on gunbroker, and for the first few times I foolishly bid on it, cuz the high bid (after half a dozen or more bids!) is usually still under $300. I've seen it get up near a grand and still wind up relisted because "RESERVE NOT MET." I don't know what this guy thinks he's going to get for an AR-18, but given how long he's been relisting it, he's clearly wrong. I just wanted a Widowmaker. I think a solid 75% of all guns on gunbroker are there because some guy wants his wife to think he's trying to sell off some of his collection but just can't seem to find a buyer.
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| # ¿ May 4, 2010 01:43 |
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infrared35 posted:My S&W 64 has an import mark too, because it was sold to and used by Austrian Customs. A 29 is a little weird though; I'd like to know the backstory on that one. There are punks all over the world who feel lucky.
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| # ¿ May 30, 2010 16:35 |
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Cyrano4747 posted:Honestly, that isn't half badly done. Engraving a Glock must be especially expensive given how hard the nitrocarbeurization leaves the metal. I've read that it takes special bits to cut the metal. Edit: But why engrave a Glock? Their entire raison d'etre is to serve as an ugly, utilitarian appliance. You might as well put racing stripes and chrome accoutrements on a lawnmower. Fang fucked around with this message at Jun 3, 2010 around 17:03 |
| # ¿ Jun 3, 2010 17:00 |
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kuffs posted:Just discovered Armslist, the Craigslist for guns. Looks like there's some decent stuff to be had, but then there's still the usual That FAL is just what you need for tactical operations in an ossuary.
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| # ¿ Jun 4, 2010 15:40 |
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| # ¿ May 25, 2013 12:48 |
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Captain Log posted:I'm still trying to iron out the character. Iranian immigrant in law school that is a die hard conservative? I think if I add that English is the second language I can get away with more. If you can play it subtly enough, you should have him believe that all conservatives at heart agree with principles of Islamic fundamentalism.
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| # ¿ Jul 17, 2010 20:25 |
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