The m:4 is a patent pending 1-piece multi-tool for the m4 carbine designed and manufactured by multitasker in conjunction with b5 systems, makers of the sopmod and sopmod-bravo buttstocks.The m:4 is precision machined from solid barstock using wire-edm/cnc, and fits discreetly with no visible footprint inside a specially inletted buttpad made by b5.Easily accessible without tools simply by pressing the release tabs on the buttpad.Dot coded to indicate functions.