Now that you know the basics of the AR-15, we’ll get into more complicated stuff. There are two primary types of gas systems for the AR-15. They are DI and Piston. DI stands for Direct Impingement. DI ...
The modular nature of the AR-15 platform, which allows the same operating system to drive guns of different calibers, barrel lengths, and other special features, has recently spawned a new subclass of ...
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