ERGO's AR-15 M-LOK Hand Stop/Barricade Support is the very best AR-15 hand stop for your M-LOK Handguard. It is a rugged" multipurpose M-LOK accessory built for hard use and solid performance. Machined from billet 6061-T6 aluminum" this multifunction stop can be used as a hand stop" and as a barricade support device for rock solid shooting from vertical structures. Attaches directly to M-LOK slots to reduce bulk and weight and its aggressive machined surface provides for a secure support or grip.