Folks, years ago I built a custom AR 15 on an Olympic Arms Super Ultra Match (SUM) Service Match Rifle platform. The work I did at Lassen College with help from Bob Chavez. This is a true tack driver!This picture is of a test grouping at 100 yards on an envelope. This is a rifle target that I shot at 100 yards. The front sight/gas block is attached with allen head set screws. Note the gap between the sling swivel mount and the gas block. The barrel is free floating.The front sight pin is filed down and wedge shaped.The barrel shroud is a piece of schedule 80 pipe machined for the gas tube and attachment of the sling swivel and bayonet lug.The barrel nut is silver soldered to a second threaded tube that mates with the barrel shroud and Loctite 271 was used to lock it together.The rear sight is all custom, collared and machined with threads to achieve 1/4 moa clicks.And the but contains a 3.5 pound lead weight for stabilization. Overall the rifle weighs in at 16.2 pounds.
Olympic Arms tack driver
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