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Not everyone has the time or the money to go out and buy a brand new AR-15. Even when it comes to building, the process can be tedious when, especially when it's done by someone without the proper experience. If you are buying a new gun or building one, more power to you, but for those who can't do either, buying one that is used is still a very viable option. Here are some things you should consider if you want to buy a used gun.Just like buyin...

The science behind barrel heatIt really is simple to understand why your barrel gets hot. And if you know why, then understanding the cooling methods will be a lot easier as well. When you fire your AR-15 the hammer strikes a firing pin, which in turn stries the percussion cap. The percussion cap then ignites the gunpowder in the casing causing a rapid expansion of gas within the barrel, which propels the projectile forward and out. The AR-15’s...

It is no secret that the AR-15 has had a long history, and its platform has gone through many changes. Whether it's to be suitable for combat, hunting, home defense or personal use, the platform is built for any need. One of these alterations to the AR-15 platform makes its stand as the M4A1 carbine. What are some of the differences between these two rifles?The M4 is a product of a problem the AR-15 faced. Its long barrel and small caliber were...