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If you are a fan of AR platforms, you already know that the caliber you choose can make a big difference in how your rifle performs. There are a bunch of different calibers out there, ranging from the smaller .223/5.56mm to larger options like the .308/7.62mm. So, what's the deal with all these different calibers? Let's find out.Understanding Caliber for AR PlatformsCaliber is the size of the bullet and the diameter of the barrel that the bullet goes through. It is important to think about when ... Read more