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I'm a Marine, and we use an ACOG on our rifles and carbines. One click is 1/3" at 100 meters, 1" at 300 meters, etc. The problem is that we shoot in yards at the range. This is a page from the USMC databook we use when firing. What's up with the clicks per inch with yards? With...

I'm thinking of getting the ATI talon stock for a mossberg 590a1, with the intention of using the stock it comes with and getting a Magpul one later on. So I have a few questions. Will the ATI be compatible with any aftermarket stock? Will anything about the ATI (besides) the recoil pad reduce...

Has anyone tried this on a pump shotgun? I'm thinking of putting one on my 590A1, along with an ATI stock/pistol grip, and a Command Arms railed forend. Any experiences?

So I recently picked up a 590A1, which I'm sure you all know by now, because this is my third question about it haha. The manual says that you should be able to empty the magazine by depressing the shell stop, which should allow each shell to spring out of the tube one by one. At least with...

I have a 590A1. I'm accustomed to cleaning pistols and rifles, but not shotguns. So far I've just brushed out the action and cleaned off the bolt face with some Hoppes #9 and a nylon brush. I'm not sure what else I have to do... I haven't tried taking the bolt out yet, because I know it'll be...

I just bought a Mossberg 590A1. I love it. It's the one with the 20" barrel, speed feed stock, and ghost ring. Two questions: I've been looking, and so far I haven't found a whole lot -- are there three dot tritium sights available for the 590A1? I found a front tritium post, but that's only...

I'm not exactly a math person, and I don't even own a Glock, but someone is trying to tell me that they discharge easily when dropped. Let me make this perfectly clear: I KNOW A GLOCK WILL NOT NORMALLY DISCHARGE WHEN DROPPED. The other guy doesn't see it that way. The only way it's possible...

Why doesn't the charging handle on an AR-15 move when the bolt comes back? Obviously it would smack you in the face if it did, so I know why it was designed that way, but how is it implemented?

After the horrible shooting today in Arizona, I've been wondering something -- is it illegal in Arizona (or the US) to carry a licensed firearm at a political event? I know people sometimes carry at political protests and such, even those where these is a public official nearby, but maybe...

If you add more mass to the bullet, you get a higher sectional density, which should yield better penetration -- but this also decreases velocity, which reduces penetration. If you lower the grain, you get a faster bullet, but less mass yields lower sectional density, and so, less...

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So I just came into a Ruger SR9c. While battling this pistol tooth and nail to take it apart, I noticed that the underside of the triggerguard appears to be unfinished. It's matte looking while the rest of the frame has a sort of gloss. http://img29.imageshack.us/i/attachment2l.jpg/...

I was out recently firing a friend's Sig 556. I forget what type of muzzle brake it had, but it wasn't factory standard. And it worked amazingly well. Compared to other rifles chambered for 5.56 of .223, it had almost no kick. It almost felt like a .22LR. So I'm confused now. As I...

Is there a formula to figure out the rpm's of a bullet, based on the barrel length, twist rate, and velocity? Maybe grain figures in as well?

Is there a quick way, like maybe a formula, of figuring out how barrel length affects velocity for a given round? For example, if a 230 gr FMJ moves at 830 fps out of a 5" barrel, is there a formula to figure out how much difference one less inch would make? It doesn't necessarily have to be...

My dad just bought a CZ P-07. He says that the guy handling the paperwork kept racking the slide till it locked, and then dropping it by forcing down the decocker instead of the slide stop. I'm not surprised the guy would do this, because I know for a fact that the guy was new at the gun shop...

Why does most of the recoil impulse happen after the projectile has left the barrel?

Anyone have any experience with seeing a 10mm chambered and fired in a .40 pistol? I'm guessing the slide would hang out of battery too much for the gun to fire, but I'm curious if this is possible or documented. There's lots of information online about firing a .40 through a 10mm, but not...

I was handling my dad's S&W PPK and noticed that when pressing the safety lever down, you can very easily leave it in between on and off. In my experience, the safety is spring loaded and if you press it down, it snaps down pretty quickly. It's having the same problem pushing the safety up...

Someone recently told me that when using an ACOG at long range, you should keep your non-dominant eye shut. And when you're using it at closer range where magnification could be disorienting, you keep both eyes open, and look at your target with your non-dominant eye while sort of overlaying the...