Unity Tactical AXON SL SYNC, Link, 7, Dual Lead Remote Switch For Crane Laser and USB-C, Fits Picatinny, Flat Dark Earth AXN-SL-UCI7F AXON SL is the smaller" single button switch in the AXON family. It hardmounts directly to an M1913 Rail with optional AXON SL M-LOK Mounting Kit (sold separately).. AXON SL features a 45-degree angled button face for an ergonomically correct activation angle" making it easy to index under stress" while wearing PPE or facing extreme environmental conditions. Molded from high-impact polymer" AXON SL holds up to abuse in the field. The mechanical switch design allows weapon light models to fire in both momentary and constant-on modes in a familiar click tailcap design. Laser versions utilize a momentary only switch to facilitate use with the native double-click-for-constant-on feature found in most common lasers on the market. Dual-lead variants are SYNC" firing both light and laser simultaneously.