Lest you think that ERGO Grip only makes accessories for KeyMod, they have now released a version of their “WedgeLok” rail covers that attach to M-LOK (patent pending).
Personally I have the KeyMod version on my rifle and I am a huge fan. They are super low profile and really increase the positive grip, as well as (in my opinion) dress up the rail a bit.
They come in three colors: Black, Dark Earth, and Olive Drab. A four pack retails at $19.95. They are constructed of “Santoprene” and a pretty heat resistant (tolerable to hold onto after dumping a number of mags–I’ve never run them on anything full-auto so I cannot attest to that level of heat). Certainly they will be fine for a “normal” day at the range.
They are 6 1/4″ long by 5/8″ wide, and like their other products are made in the US. There is really not much more to say–the KeyMod versions are a great product and I highly recommend them. I presume the M-LOK will be just as good.