If you want a firearm that is cheap to shoot, easy on the shoulder, and a natural partner for a suppressor, the AR-9 deserves a spot at the top of your list. This 9mm, AR-style pistol caliber carbine (PCC) checks nearly every box for a suppressor ready range gun: low recoil, affordable ammo, a simple operating system, and a huge aftermarket. Here is why so many shooters consider the AR-9 the ideal suppressor host for relaxed, high-volume range days. What Is an AR-9? An AR-9 is an AR-15-style ca …