World's largest gun

Big enough for you?   The ultimate crew served weapon.   Learn more about the world's largest gun, the 500 man crew to support it, and why it needed to be rebored after every 20 shots!   Read the article at Popular Mechanics. 

32 printable targets

These are collected from various sites. If you have some you'd like to share, email them my way and I'll include them in my download. When I see things like this on the 'Net I just grab 'em. Too many times now I've seen a good site, or good resources just disappear.
Click here to download the targets.

Need a ballistic trajectory calculator (or 2) for your iPhone?

Ballistic is a fast, highly-accurate ballistic trajectory calculator and range companion for the iPhone. Ballistic calculates path, windage, velocity, time, and energy for any valid range, and can compensate for atmospheric conditions such as temperature, barometric pressure, humidity, and altitude. It's also much more than a basic trajectory calculator. With a vast library of over 1,000 projectiles, range estimation calculator, and a range log, Ballistic is a complete mobile companion for hunting or at the range. 

You can download this application from the iTunes store here, You can also see many more screen shots and read more about this program at the developer's website here. 

Knight's Armament has its own program called Bullet Flight, which you can purchase from the iTunes store here. You can read more about the program at the Knight's Armament site here. 

You can also see the picatinny rail mount they designed to attach to an Otterbox case that can hold an iPod Touch. The iPod Touch would then run the Bullet Flight program. If Otterbox makes a case with the same style clip mount for the iPhone, then you could use an iPhone to run the Bullet Flight program as well. I am unable to find any information about this mount on the Knight's Armament site. 

So you want to buy an AR-15, huh?

Here's a very detailed thread on what to look for in an AR-15. It's written, and photo documented so well, that it will give most anyone an education in what to look for in the ultimate "evil black gun." This buyer's guide (written by an active police officer) is slanted toward other patrol officers who know nothing about the AR-15 and tries to present a level playing field for comparing some of the most popular models from mainstream manufacturers. 

There is debate over whether or not having a full-automatic bolt carrier group in a semi-automatic rifle implies constructive posession. If you read this thread you can read correspondence between Colt and the ATF about this not being an issue with a certain provision.