Midwest Industries MI AR-15/M16 M-Series Two Piece Drop-In Handguard, M-LOK compatible, Carbine Length, Fits AR-15 Rifles, Black MI-17M The Midwest Industries M-Series Carbine Length M-LOK Two Piece Drop-In Handguard is incredibly lightweight. It installs in minutes by dropping in to replace the factory polymer handguards and has five anti rotation QD sling swivel socket locations. It comes equipped with a continuous Mil-Std 1913 top rail that bridges the gap over the delta ring for a monolithic look with the upper receiver. 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.