Midwest Industries MLOK SD Handguard, Fits MP5K and Clones, Hard Coat Anodized Finish, Black MI-MP5K-SD The Midwest Industries MLOK Suppressor Handguard MP5K Handguard is constructed of rugged 6061 aluminum with a hard coat anodized finish. Midwest Industries is a proven leader in the firearm industry. Made in the USA" focusing on the small details to make your rifle platform better.