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

[Diamondback]

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.

Going Canadian C7/C8-style? They have the Elcan C79/M134 mount purpose-cut so it'll nest in behind a fixed BUIS at extreme front of the receiver as "standard." (Our C8 is rather different based on a Canadian friend's private-purchase setup for his tour in the Rockpile.)

[camoman]

Man, just put your buis in front of the cog. You will gain function, and still have your back ups.

[Diamondback]

Illustration from the Vickers Collection:

[markm]

buy the TA01NSN and use the little irons on the Scope.

[Pappabear]

Man, just put your buis in front of the cog. You will gain function, and still have your back ups.

Ive done this with my Offset BUIS. Magpul ones are a bit cheaper than KAC's.

PB

[ABNAK]

The TA31 I have takes up a lot less real estate than an Elcan. Even with the BUIS in front of the scope it will not be at the front of the receiver.