AR pistols seem to be the new “hot” build these days. Everyone researches barrel lengths, gas blocks, buffers and springs, muzzle devices and buffer tubes when they go to build their pistol, but I don’t recall the last time I saw someone ask what pistol grip to use.
Most people feel a pistol grip is a pistol grip and if they liked the one on their rifle, it should be fine on their pistol. This is false. Well, it might be false, at least.
For some reason, people seem to forget about the difference in Length Of Pull. Using a standard pistol buffer tube, or even one with a Sig Brace, your grip is a lot closer to your body and that means a change in the angle you hold the pistol. Most grips are angled backward a lot, which keeps your hand further from your body when using a regular pistol grip because of the shorter LOP. With the K2 though, it has more of a vertical grip, pulling your hand closer to your body, which gives you a more comfortable wrist angle.
I’m not normally a Magpul fan for their grips; I prefer Hogue rubberized grips on my AR rifles. When it comes to my pistol builds though, the K2 is hard to beat. The angle is comfortable, the texture is grippy enough, and the storage compartment is useful. It even comes with mounting hardware. I just wish it came with a battery holder for the storage compartment instead of just a plain cover, but that’s nitpicking as it is compatible with all standard MOE grip storage cores.
When I tried the K2 on my main rifle, I didn’t like it unless I ran my stock closed up as the angle doesn’t work as well with a longer LOP, but if my rifle was a duty rifle and I would normally wear body armor with it, I’d consider the K2 since my stock would be run collapsed due to the armor, shortening my LOP.
Building a carbine? Skip the K2 and look at other options. Building a PDW or general AR pistol build though? Check out the K2 to give yourself a more appropriate grip angle.