Magpul’s M-LOK rail system has become a favorite option among shooters for attaching accessories such as slings, bipods and lights to hunting- and tactical-style longarms, especially AR/M4-pattern rifles. For rifles equipped with clam-shell handguards and spring-tensioned Delta rings, Magpul offers the MOE SL Handguard as a drop-in, M-LOK-compatible upgrade. The SL is a trim, lightweight component that features molded ribs to improve purchase, a forward handstop and, of course, plenty of M-LOK slots at the 2-, 6- and 10-o’clock positions. Available for mid- and carbine-length gas systems in black, flat dark earth, gray and olive drab green. To install, the front sling swivel must be removed, and the SL requires a round—not triangular—front handguard retaining cap. Price: $40. Contact: Magpul; (877) 462-4785; magpul.com.