Abstract: A firearm (10) constructed in accordance with the principles of a preferred embodiment of the present invention and configured for firing large caliber ammunition at precisely defined targets at long range is disclosed. The firearm (10) broadly includes a stock (12), a receiver (14) supported in the stock (12), a barrel (14a) threadably coupled to the receiver (14), hardware (16) associated with the receiver (14) for firing ammunition through the barrel (14a), a scope (18), and a scope-mounting base (20) coupled to the receiver (14) for mounting the scope (18) thereto in the line of sight. The base (20) includes a mount (24) adapted to be fixed to the receiver (14), an adjustable recoil lug (26) for anchoring the base (20) relative to the receiver (14), and a pair of ring clamps (28 and 30) for coupling the scope (18) to the base (20).

Abstract: A refractory brick wall system for towers and the like which includes an outside casing and a plurality of bricks laid up in a pattern on the inside of the casing. Tie-back devices secure the bricks to the casing and allow for relative horizontal and relative vertical movement between the bricks and the casing. A plurality of shelves are fixed to the inside of the casing at vertically spaced intervals to provide support for the bricks in vertical sections thereof. A lightweight, insulating refractory material is cast between the casing and the bricks. The bricks themselves are shaped with ring and groove sides for interlocking of the bricks in a laid-up wall construction thereof.

Abstract: A modular door jamb and lintel system for an industrial furnace having an access door opening. A module is provided with a pair of spaced, generally vertical door jambs of precast refractory material. A refractory lintel spans the door jambs and combines therewith to define a frame for the access opening. Hangers are provided on the lintel to facilitate transporting and installing the lintel in position at the access opening. Fasteners are provided on at least the door jambs to facilitate securing the door jambs to appropriate structural members about the access opening.