Eotech 512 for Colt MRR

it'll mount right up. iirc the batteries on the 512 run side by side and have been known on occasion to have connective issues.
I picked up the xps2.0 and couldn't be happier. it'll keep me within 2inches at 100yds without trying.
 
it'll mount right up. iirc the batteries on the 512 run side by side and have been known on occasion to have connective issues.
I picked up the xps2.0 and couldn't be happier. it'll keep me within 2inches at 100yds without trying.

Not on occasion, pretty much all the time. In fact the problem was so great the Eotech/L3 redesigned the sight and placed the battery perpendicular to the recoil plain to prevent battery contact failure..
 
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