The Ergo 4255 is an affordable vertical forearm pistol grip solution for just about anything with a picatinny rail. For this review the test platform was a Palmetto State Armory M4 carbine with pink Magpul and Egro furniture.
There is an old saying, Keep It Simple Stupid, otherwise known as KISS. The Ergo 4255 does just that, it keeps the forearm vertical grip simple.
The Ergo 4255 does not include a built-in light or laser, which makes it an excellent choice for someone who wants just a vertical forearm AR-15 grip.
Excluding a light and laser does two things – it keeps the grip in an affordable price range, and reduces the weight.