To be most effective...iron sights will be:
1. Parallel to the bore
2. Directly above the bore
3. As close to the bore centerline as possible
4. As far apart as possible
Placing your iron sights very close together essentially reverts it back to long pistol length...far from ideal, but will probably work in a pinch (better than nothing). It'll look goofy as hell too...if you care about that.
You might want to opt for an optic that has built in emergency sights...like the Specter/ELCAN/ACOG.
Also...the typical rail mounted BUIS setups are typically built to establish a sight line a given height above the rail...so you'd probably need both a front and a rear BUIS. The built in iron sight on that rifle is set at a height that matches the built in front sight...if you stuck a rail mount front BUIS on it and used the built in rear sight, you'd probably never be able to get the gun to shoot on target.
Last edited by m102404; February 23rd, 2012 at 16:13..
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