BUIS Calibrated for .308?

[Oguruma]

Anybody know of a rear iron sight that is calibrated for .308 rifles? I thought the KAC 200-600 sight was, but apparently it is calibrated for 5.56.

 

[Longeye]

Re: BUIS Calibrated for .308?

This would get more traffic if it was posted in the gas gun section/

If you are planning to use the BUIS for a actual BUIS, it does not need calibrated for extended distance. If you are planning to shoot primarily with iron sights at the distances you mention you can do two things:

1-Use an actual diopter sight that is optimized for shooting dots at distance ala National match style. You will spend nearly as much on these as you would a decent scope.

2- Flip your calendar from 1952 over to 2012.

As an aside, Knight does make a 7.62 calibrated BUIS. It is hard to find and expensive, as well as having a very narrow application window. But this is Sniper's hide where practical considerations like that don't generally apply.

 

[ORD]

Re: BUIS Calibrated for .308?

+1 on KAC making a specific, 7.62 BUIS, BUT...I have posted this before, but it I suppose it bears repeating...

The proverbial ".308 Specific" or ".308 BDC marked" BUIS suffer from the same problems as other BDC concept sights/optics...they were all built for a specific rifle, with a specific barrel, with specific ammo, etc. Change any one of those variables and you can have a HUGE divergence in where the bullet actually goes vs. where your nifty BUIS says it will go at the range you dial it in for.

Also, your average BUIS (regardless of whether they are 5.56/223/7.62/308/etc.-specific) aren't designed to be precision instruments for accurate, extended range fire. They do "okay" but are FAR from ideal and not something that I'd generally want to trust for getting the job done at long range. Generally BUIS get slapped on a rifle and then never fooled with. If people do take time to adjust them and get them zeroed for a specific range...adjustments are coarse, difficult to adjust in any hurry (or non-adjustable as a worst-case scenario) and thus, make for a terrible solution if you need to go from a battle-zero to accurately putting rounds on target at extended ranges. Also, some BUIS suffer from return-to-zero/repeatability issues because of the "flip-up"/retractable design.

Let's try this...what are your specific needs? What rifle/setup will you be using them on, etc.? Let your specific needs dictate the "best" option and skip the proverbial "one size fits all" .308 specific BUIS.