Crafted with a high-strength 6-series aluminum, the Strike Industries Handguard is built to withstand hard use while maintaining precise alignment. By expanding your mounting capabilities and optimizing weapon handling, it transforms your platform into a highly adaptable, more responsive system. FeaturesM-LOK slots on 9, 11, 1, and 3 o'clock positions.Picatinny rail on top and bottom.Machined from durable 6-series aluminum. NOTE: The Aluminum Handguard Rail is a standalone item that is inserted into the SMC PS90 Chassis. To maintain a true zero, optics and laser/aiming devices must be installed directly onto the PS90 receiver, not on the handguard rail or SMC chassis.