Shop › MIDWEST G4M M-LOK 15" HNDGRD BLK MIDWEST G4M M-LOK 15" HNDGRD BLK $209.95 Midwest Industries Gen 4 M-Series Handguard, M-LOK, Fits AR-15 Rifles, 15", Black MI-G4M15 Quantity: Add To Cart Added! Midwest Industries Gen 4 M-Series Handguard, M-LOK, Fits AR-15 Rifles, 15", Black MI-G4M15