A must have! - Bravo Company Mfg MCMR Rail Cover Kit, 5-PACK

I used these on a DD and a BCM. They work great. M-Lok rails tend to heat up much faster than picatinny rails, at least in my experience. These rail panels definitely help mitigate that. Plus I think they look great and provide a right amount of grip/traction for your support hand. They are the best option out there in my opinion and more economical than the packs of individual hole fillers, and these can be cut for custom lengths. I have cut and used a flame to soften the cut edges on a number of pieces. Definitely a must have for me