Shop › MIDWEST HK 91 HANDGUARD MLOK BLK MIDWEST HK 91 HANDGUARD MLOK BLK $199.95 Midwest Industries Handguard, Fits HK 91 and Clones, M-LOK Compatible, Mil-Spec Top Rail, Black MI-HK91M Quantity: Add To Cart Added! Midwest Industries Handguard, Fits HK 91 and Clones, M-LOK Compatible, Mil-Spec Top Rail, Black MI-HK91M