Leapers, Inc. - UTG UTG PRO Super Slim Drop In MLOK Rail System, AR-15, Carbine Length, Black MTU001SSM Leapers" Inc. develops" manufactures" and distributes a wide range of innovative and technologically advanced hunting and shooting sport oriented products across a multitude of different platforms. This is the UTG Pro super slim" carbine length" drop in MLOK rail system for AR-15 rifles. It features 24 M-LOK slots on 6-slot tracks for mounting M-LOK rails and direct accessories" making it easy for the user to tailor the rifle to their specific requirements