Which BUIS allows for the rear-most mounting of an ACOG?

[ABNAK]

Doesn't the KAC 600m or their 300m BUIS allow the ACOG to be mounted at least one notch more to the rear than, say, a Matech? I want a BUIS on all my long guns and yet have to work with the ACOG's stingy eye relief. Asking before I spend the $$$ on a KAC rear BUIS assuming it's better than the Matech for my question. Going to be on an A4 clone.

[Molon]

KAC 200-600 meter . . .




.....

[GTF425]

KAC 600m will go furthest rear with a LT-622 mount.

[OutofBatt3ry]

From personal experience...Just stick the ACOG as far back as needed to get the best eye relief and delete the BUIS. The ACOG is pretty farcking durable.

[studenygreg]

I have the magpul pro and kram riser. The rear sight tucks under it nicely

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[VIP3R 237]

I have the magpul pro and kram riser. The rear sight tucks under it nicely

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Kram riser is the way to go.

[markm]

From personal experience...Just stick the ACOG as far back as needed to get the best eye relief and delete the BUIS. The ACOG is pretty farcking durable.

Yep. No rear flipper on my gun.

[georgeib]

Technically you could mount the rear buis in front of the ACOG. It's not like it can be used with the ACOG in place either way.

[ABNAK]

I put the ACOG (without BUIS) in the rear-most position where the mount didn't overhang the charging handle. For me it was PERFECT for eye relief! Gonna just mount a BUIS in front of the ACOG.

[OutofBatt3ry]

I put the ACOG (without BUIS) in the rear-most position where the mount didn't overhang the charging handle. For me it was PERFECT for eye relief! Gonna just mount a BUIS in front of the ACOG.

If it works for you = )

Actually makes sense. If the optic fails, you remove it and can still shoot, being forward a little bit just isn't going make much of a difference. Wish I'd of thought of that.