Abstract: A buffer bumper assembly for use with some firearms that incorporate a recoil based operating system. The buffer bumper assembly may be disposed on a buffer bumper structure that may be installed inside of a recoil spring around an end thereof. The buffer bumper assembly comprises an upper segment, a lower segment, a biasing structure and a connector. The upper segment and lower segment are interconnected with the connector and reciprocally movable to one another. The upper segment and lower segment may be collectable disposable into and out of a compressed position and an uncompressed position. The biasing structure may at least partially assume the energy of an impact associated with a recoil cycle when it is compressed and when the upper segment and lower segment are collectively disposed in the compressed position.

Abstract: An elevation adjustable firearm front sight with user changeable sighting elements that includes a lower rotatable front sight insert member adapted to be secured to a firearm front sight base and an upper front sight insert member rotatably secured to the upper portion of the lower rotatable front sight insert member. The front sight insert member has a plurality of front sight elements that are selectable by the firearm user by rotating the upper front sight insert member that is rotatably secured to the upper portion of the lower rotatable front sight insert member. This sight has provisions for permitting the user to select the front sight element by rotating the front sight mounting member without changing the elevation setting of the front sight.

Abstract: A mounting apparatus for mounting accessories to firearms comprises an accessory lug, a frame, and an accessory lug fixture. The accessory lug is fixed to the firearm. The accessory lug has a lug cross-section shaped to prevent the accessory lug from being received within a standard bayonet lug fixture. The frame includes an accessory-holding portion adapted for holding the accessory and an accessory lug fixture connected to the frame. The accessory lug fixture has a lug-receiving channel with a channel cross-section. The channel cross-section is different than a cross-section of a standard bayonet lug. The channel cross-section is shaped to permit the channel to receive either the accessory lug or a standard bayonet lug in a manner for securing the frame and the accessory to the firearm.