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Old 04-13-2011, 12:54 PM
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Duffy Duffy is offline
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Join Date: Jul 2010
Posts: 144
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Default Improved Matech BUIS bracket and screw kit

Weight: 0.3 oz. (Bracket & Screw)
Bracket Material: 1080 Bar Stock Steel (CNC'ed)
Screw: Grade 8+, #6-32 x 1-1/4, 7/64 size Allen Head
Finish: Manganese Phosphate
Dimensions: 0.92L x 0.345W x 0.347H (Bracket)
Manufacture: U.S.A.

The Matech backup sight is one of the best B.U.I.S. (Back Up Iron Sight) available. It's one of the few B.U.I.S. that has adjustable elevation adjustment, it is also readily available and affordable. Based on user requests, input, and feedback, we have sought to make a great backup sight better.

The original screw has an over sized Allen head. This aspect, in conjunction with the small diameter and relatively weak screw, tends to promote over torquing, resulting the recoil screw snapping in two.

We have strengthened the mounting screw, in our tests, the factory screw snapped at 30"/LB, the screw we selected, a Grade 8 plus, broke between 45 and 52"/LB. The Allen head on our screw is smaller to reduce the likelihood of over torquing.

The mounting clamp itself has been redesigned, it is counter bored to reduce the protrusion of the screw. The section that interfaces with the sight is twice as thick as the factory clamp (1.25mm vs. 2.60mm).

The retrofit clamp is CNC machined from solid 1080 carbon bar stock steel and manganese phosphate plated.

The retrofit clamp is cut to a tight tolerance, it will fit Mil-Spec. receivers. On receivers with tolerances on the plus side, both the factory and our retrofit clamp will cant slightly, this is due to the Matech's clamp being somewhat unique design, however, this is cosmetic only, as the sight is secure and does not move on the receiver.






You can find the BAD-BSM here, free shipping
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