3 Picatinny Hand Guard Rails System For H&K G3 Three Picatinny rails surround the barrel for a secure & stable fit. Exceptional design, allows numerous accessories. Excellent for grips pods, lights, lasers and other mounts. To fit reflex sight, it is recommended to add #TR5L-G Aluminum three rail handguard for the H&K G3. Designed & manufactured for a secure and stable fit.