Slim, sturdy, and feels great - Timber Creek M-Lok Enforcer Vertical Foregrip

I bought this for an AK-47 and it feels good, has solid construction, is super light, and looks great. I bought the black version, but they offer many different colors. There's no sharp angles or edges so you don't need gloves to use it, and the serrations on the front and rear aren't very aggressive (which could be a pro/con for some). It has a slim design compared to some other vertical foregrips; so it doesn't protrude out from the sides of your handguard.

The "skeletonized" center is slightly recessed, so it shouldn't snag on gloves or cases. However, it does have enough of a gap that a buckle, or even a finger, could get snagged; although I haven't had any problem with it. You might need a longer hex key\driver, as one of the MLok mounts is accessed thru the center (the supplied hex key with mine was too short).

It might be a little expensive, but you won't need to worry about it failing, and it should last the entire build. If you want a quality, light-weight aluminum foregrip, then this should more than suffice.