Abstract: A clamping mechanism for attaching a handguard to a firearm includes a barrel nut having radially outwardly directed tines, a tubular body having a plurality of longitudinal grooves separated by lands forming an inner surface of the tubular body, and a pair of circumferentially extending grooves traversing the lands, formed forward from a rearward end of the tubular body. A clamp element is carried by the tubular body and includes a body with a beveled end and a heel extending substantially perpendicularly from an opposing end of the body. The clamp element is adjustably positioned within the tubular body with the heel extending radially outwardly and received in the second groove and the beveled end engages the barrel nut.

Abstract: An incrementally adjustable sight for a firearm is taught. The sight includes a base attachable to a firearm and a housing carried by the base. The housing includes a central cavity having an opening and carrying a sight post assembly. The sight post assembly includes a sight post having a first end extending outwardly from the central cavity through the opening and a second end. A cam follower and a cam member are carried by the sight post with the cam member, cammingly engaging the cam follower between a plurality of positions. A biasing member biases the first end of the sight post away from one of the cam follower and the cam member a distance. The distance is adjusted by relative movement of the cam member and the cam follower between the plurality of positions.

Abstract: Tough laminated composite material which comprise (A) long reinforcing fibers, (B) a matrix resin mixed with the long reinforcing fibers and (C1) a resin, preferably in the form of fine resin particles, forming a phase separate from said matrix resin which is localized in inter-layer zones, wherein 90% or more of said resin (C1) is localized in inter-layer zones and/or wherein the border length factor in the inter-layer zones is 2.5 or more and prepegs used to form the composite materials.