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Posted: Tue Dec 29, 2009 4:18 pm
Can't believe I didn't notice it until last night, but I was playing some MW2 multiplayer using the P90 and realized what it was about it that I always thought was wrong. I just couldn't put my finger on it before. Might be completely obvious to others but, despite the weird top-mounted magazine being kind of slow compared to vertical, stacked magazines, there's another thing.  See it? The sight radius. It's downright tiny! Goes from the rear part of the little top-mounted arm thing to the front. It might have a long barrel length for its overall length, but studies have proven that sight radius has more to do with accuracy than barrel length (within reason--2" barrel with three foot sight radius still won't be any bench rest rifle). The P90's portability is its main point, and I'm not trying to offer points against it as a long range percision rifle by saying this (because that's not what it is), but a pistol with a stock may have more accuracy than the P90's configuration. Problem is, they can't do a damn thing about it unless they want to change the whole design. Until we come up with super-projected holographic sights. In other, more awesome, news--I had a local shop/pistol range order my shotgun. Would have it Friday if UPS delivered on New Years (bastards!) so I cant wait till Monday. mrgreen
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Posted: Tue Dec 29, 2009 4:52 pm
Why is short sight distance a disadvantage?
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Posted: Tue Dec 29, 2009 5:15 pm
Ubasti Why is short sight distance a disadvantage? The longer your sight picture, the more accurate your efforts to line the front sight up within the rear. It's kind of hard to explain, but it works. There's more space between, so you end up lining them more accurately. We're talking about tiny fractions of millimeters of difference between the front and rear sights, but it turns to inches and feet at distances.
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Posted: Tue Dec 29, 2009 5:18 pm
I had the same impression of that sight radius until I visualized my Bersa .380 sight radius by it. The FN is a few millimeters longer. Not that this is a great iron sight gun out of the gate. Oh, if you are madly in love with the caliber, you can waste $1000 and buy a PWA AR-57 built upper assembly with barrel and rails. Note in the second photo that someone with a brain used an empty magazine to catch the spent brass from the gun. One could even put folding iron sights on the rails. http://www.impactguns.com/store/094922150479.htmlMe? I don't get the need for the 5.7mm round to begin with. Don't we have enough bullets that are ineffectual in real combat already? PS, the $1000 price quoted is for a fully assembled rifle off the rack at Impact Guns. Saw one today while waiting for some range time.
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Posted: Tue Dec 29, 2009 5:18 pm
Isn't the built-in optic a piece of s**t, too?
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Posted: Tue Dec 29, 2009 5:20 pm
ArmasTermin Ubasti Why is short sight distance a disadvantage? The longer your sight picture, the more accurate your efforts to line the front sight up within the rear. It's kind of hard to explain, but it works. There's more space between, so you end up lining them more accurately. We're talking about tiny fractions of millimeters of difference between the front and rear sights, but it turns to inches and feet at distances. Couldn't you use a laser or something to confirm that the sights are perfectly aligned?
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Posted: Tue Dec 29, 2009 5:24 pm
Ubasti ArmasTermin Ubasti Why is short sight distance a disadvantage? The longer your sight picture, the more accurate your efforts to line the front sight up within the rear. It's kind of hard to explain, but it works. There's more space between, so you end up lining them more accurately. We're talking about tiny fractions of millimeters of difference between the front and rear sights, but it turns to inches and feet at distances. Couldn't you use a laser or something to confirm that the sights are perfectly aligned? Lasers are not perfect and also have parallax. Such as similar faults to a scope--it really is only accurate at the given distance, because normal sights actually aim downwards slightly, to intersect the ballistic arc at a given point. And it's PHYSICALLY moving the gun to align the sites. Not adjusting the sites themselves. A longer sight radius does increase potential accuracy, because they front and rear sites and be aligned in even smaller increments, and easier (within reason. s**t gets heavy and long really fast.)
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Posted: Tue Dec 29, 2009 5:44 pm
I see plenty of use for 5.7 as a target gun cartridge. But outside military use (with the fancy AP rounds) it's just a .17 that's been going to the gym.
I want it to be good, because it makes me think of the guns in Ghost in the Shell, but it just isn't. But I have hopes for future use of necked-down pistol cartridges. The .357 SIG is supposed to be a really good cartridge.
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Posted: Tue Dec 29, 2009 8:39 pm
owenmarco Isn't the built-in optic a piece of s**t, too? I've looked through one, and I like the reticle. Zero trigger time though, so I can't say how well it works. As to the BUIS, they're just that; back-ups. They're only there if your main sights break, and if they've broken, you're probably in close enough combat that ANY iron sights are good enough.
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Posted: Wed Dec 30, 2009 2:03 pm
Fresnel owenmarco Isn't the built-in optic a piece of s**t, too? I've looked through one, and I like the reticle. Zero trigger time though, so I can't say how well it works. As to the BUIS, they're just that; back-ups. They're only there if your main sights break, and if they've broken, you're probably in close enough combat that ANY iron sights are good enough. I would much rather have a good red dot in place of the basic sights. I think Trijicon makes a red dot that has the fiber optic/no batteries required system.
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Posted: Wed Dec 30, 2009 2:52 pm
Sgt Buckner Fresnel owenmarco Isn't the built-in optic a piece of s**t, too? I've looked through one, and I like the reticle. Zero trigger time though, so I can't say how well it works. As to the BUIS, they're just that; back-ups. They're only there if your main sights break, and if they've broken, you're probably in close enough combat that ANY iron sights are good enough. I would much rather have a good red dot in place of the basic sights. I think Trijicon makes a red dot that has the fiber optic/no batteries required system. It's got no magnification, and it's surprisingly clear on most backgrounds. The BUIS are only there for incredibly adverse conditions, like "my glass optics just took a bullet/grenade fragment and there's nothing left to look through". And I've tried the Trijicon. No idea how they even sell them... the glare was so bad I couldn't see the target through the reflection of my own eye.
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Posted: Wed Dec 30, 2009 6:39 pm
Fresnel Sgt Buckner Fresnel owenmarco Isn't the built-in optic a piece of s**t, too? I've looked through one, and I like the reticle. Zero trigger time though, so I can't say how well it works. As to the BUIS, they're just that; back-ups. They're only there if your main sights break, and if they've broken, you're probably in close enough combat that ANY iron sights are good enough. I would much rather have a good red dot in place of the basic sights. I think Trijicon makes a red dot that has the fiber optic/no batteries required system. It's got no magnification, and it's surprisingly clear on most backgrounds. The BUIS are only there for incredibly adverse conditions, like "my glass optics just took a bullet/grenade fragment and there's nothing left to look through". And I've tried the Trijicon. No idea how they even sell them... the glare was so bad I couldn't see the target through the reflection of my own eye. Light filter to reduce glare.
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Posted: Wed Dec 30, 2009 7:12 pm
Sgt Buckner Fresnel Sgt Buckner Fresnel owenmarco Isn't the built-in optic a piece of s**t, too? I've looked through one, and I like the reticle. Zero trigger time though, so I can't say how well it works. As to the BUIS, they're just that; back-ups. They're only there if your main sights break, and if they've broken, you're probably in close enough combat that ANY iron sights are good enough. I would much rather have a good red dot in place of the basic sights. I think Trijicon makes a red dot that has the fiber optic/no batteries required system. It's got no magnification, and it's surprisingly clear on most backgrounds. The BUIS are only there for incredibly adverse conditions, like "my glass optics just took a bullet/grenade fragment and there's nothing left to look through". And I've tried the Trijicon. No idea how they even sell them... the glare was so bad I couldn't see the target through the reflection of my own eye. Light filter to reduce glare. First, that's for an Aimpoint, not a Trijicon. Second, that's for the outside, so other people don't see your glare. This was me seeing my own glare, to the point where I couldn't tell reticle from cornea.
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Posted: Wed Dec 30, 2009 8:26 pm
The P90 wasn't meant to be a precision weapon for range. It was built for extremely short distances or to be hidden under a jacket. If you're using a P90 for distances more than 10 feet, you probably need a different weapon. As for the AR-15 conversion kit, I wouldn't spend the money to GET an AR-15 to convert, much less the conversion kit. I'll get a Five-Seven if I must ABSOLUTELY have a gun chambered in that caliber, and I have no desire to own that either. Actually, now whenever I see a P90, I automatically think of the Machine Gun from Doom 3.  It's literally an oversized chopped up P90 with a Halo-esque ammo display in place of the optic sights.
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Posted: Wed Dec 30, 2009 9:01 pm
Requiem in Mortis The P90 wasn't meant to be a precision weapon for range. It was built for extremely short distances or to be hidden under a jacket. If you're using a P90 for distances more than 10 feet, you probably need a different weapon. Why the hell are you using such a large, heavy gun for that range, though?
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