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One of the requirements for the US military pistol competition that resulted in the selection of the Beretta 92 as the M9 was that the pistol should have a certain amount of energy for reliable ignition of (sometimes hard) military primers. How was this measured? Was it just the amount of...

I've been thinking about takedown/folding rifles after seeing a friend's excellent factory takedown Mannlicher-Schoenauer (I committed the sin of coveting things that are my neighbor's, I'm afraid). It occurred to me that it's very easy to store a pistol in some manner that's inconspicuous...

Some years ago I ran across this article: http://www.z-hat.com/Efficiency%20of%20the%20300%20Hawk.htm On the thermodynamic efficiency of firearms; that is, how much of the energy of the burning gunpowder gets converted into motion of the bullet. Does anyone know if the figures in this...

Does anyone know what the firearm in this picture: http://forum.axishistory.com/files/pix517960688_156.jpg is? I've seen it tagged as an "MP-45" before. It looks like some sort of late WWII experimental design in 7.92x33mm, though it clearly is not a close relative of the STG-44 as it...

Does anyone know enough, or know of a link that knows enough to explain how 80% complete receivers for AR-15s work?

Has Beretta begun selling the magazine sleeve and release button kit for converting .45 CX4s to use .45 PX4 magazines yet?

Hypothetical question: On SMG designs like the uzi with a telescoped bolt, the barrel is attached to the receiver (with a nut as I recall) about halfway along its length. Would this made the barrel effectively stiffer? Assuming that the rest of the length is free-floated (don't recall how...

I seem to recall and x-ray photograph of an FN PS90, or perhaps a P90. It gave a good look at the internals, since the x-ray could see right through the polymer exterior. Does anyone have it?

Why is it that astronomers probe the deepest heavens with reflecting telescopes, and we aim our rifles with heavy, expensive refracting models like a bunch of suckers? And don't tell me "it's because reflecting telescopes invert the image," not all of them do. Is it a scaling issue? The...

What sorts of things make for a good firearms manual? Clear language? Good illustrations? How should one be arranged? Should the features of the gun be documented in the manual, of would the buyer be expected to know the selling points already? Aside from basic cleaning and operations...

Mall Ninjas? Bubbaing?

Does anyone know, or better, have a diagram of how the tandem magazines in the SPIW and Vesely V42 worked? It seems to be two conventional box magazines, one in front of the other. The first box feeds first, and then... somehow, when that is exhausted, the rear box begins feeding. Frankly...

Just a quick run down of how I figure it, to see if I have it right: -One way or another, the receiver of a rifle is going to have to be strong enough to withstand compression between the stock and the barrel trunnion when it is fired. -On a rifle with a bolt that locks into the...

Does anyone here who was shooting during the Vietnam era remember whether ammunition costs went up as a result of the conflict?

There was a post, the author and date of which I have long forgotten, to the effect that any firearms chambered in a smokeless rifle cartridge in working order cannot truly be considered obsolete. There is a lot of wisdom in this, I think; who here would feel unimpressed with the lethality of a...

What specific features make a semi-auto rifle more likely to operate reliably in conditions of high particulates? Obviously, having a closed receiver that doesn't let junk in to begin with is good, and having some clearance between parts is desirable. As with most things mechanical, the maxim...

It being generally reckoned that women are the fastest growing demographics in the shooting sports, and The High Road being host to a goodly number of erudite women, I saw the thread for husbands and thought it would be a shame if the resident wives didn't weigh in as well. So, I am curious...

http://www.favsarmi.com/Html%20Files/products.htm Like, can you get them in the states?

Does anyone here shoot a gun chambered in 7.92x33? If so, what is your opinion on the round?

Old Cockaigne D'Cordite (to the tune of "Big Rock Candy Mountain") One morning in the big gun store, through the front doors set a'turning came an IPSC shooter strolling, and he said now I am yearning To be headed for a land that's far away beside the fields of flourite So don't be late, let's...