ATAIRSOFT Tactical Helmet Accessories flashlight Clamp for 1'' or 3/4'' flashlight 100% Brand New For fast /ACH /MICH /IBH helmet ARC Rail A package 4 pc, Includes:2 pc picatinny adapters, 1 adjustable single clamp, 1 tactical weapon There are 2 sizes can be selected: 1'' or 3/4"