The M:4 is precision machined from solid bar stock using wire-EDM/CNC and fits discreetly with no visible footprint inside our specially inletted buttpad. Easily accessible without tools simply by pressing the release tabs on the buttpad (sold separately). Dot coded to indicate functions. 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. Product Features Tools: slotted screwdriver, castle nut spanner, 1/2 hex for scope mounts, and bolt override Precision machined from barstock Nests inside the b5 systems buttpad Product Specifications Weight: 1.12 oz Length: 3.82 in Width: .62 in Height: .1 in