So You've Decided to Build a Pistol Caliber AR (EPC/AR-9)
Now that you’ve chosen to explore the pistol caliber AR, you will need to decide what kind of pistol caliber AR you want to build.
We have designed AR-9 builds around the Aero Precision EPC platform. This is one of the best purpose-built PCC platforms available. If you have not already done so, please check out our Platform article in the Design section for a detailed analysis of the EPC and other Aero Precision platforms.
We have assembled kits for pistol caliber AR pistols and carbines.
Pistol
A true AR pistol is more about fun than practicality. It is generally the lightest of the styles of AR, which it largely attributes to the lack of a buttstock and a shorter barrel. The practical range of an AR pistol is short as a result of the shorter barrel (which contributes to lower muzzle velocity) and lack of a stabilizing buttstock. An AR pistol is fun, but it isn’t really a combat-practical gun…unless you put a buttstock on it. But that will get you in trouble if you don’t follow the NFA process. For more, visit our NFA and Prison and NFA and “Class 3” articles.
Carbine
A carbine is the most versatile AR design. It is not as compact as a pistol, but it is still very capable of close quarters engagement of targets. At the same time, it can reach out to moderate distances, without the bulk and weight of a rifle. A carbine will generally have a buttstock that is on-the-fly adjustable for length of pull, which is really the part that makes this versatility possible. A carbine will be heavier than a pistol, but lighter and more portable than a rifle. A carbine will be longer than a pistol, but shorter than a rifle. This is your Goldilocks gun in most scenarios.
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