The best replacement for acog is eotech.

The best alternatives to acog are rated as following:
★★★★★  eotech
★★★★  aimpoint
★★★★  red dot
★★★  scope
★★  accupoint
★★  elcan
★★  hamr
★  vcog
★  holographic
★  reflex
★  aimpoint pro
★  eotech with magnifier
★  1-4
★  red dot with magnifier
  browe
  nightforce
  1-4x
  pso-1
  aimpoint with magnifier
  vmr
  red dot mw3
  m145
  aimpoint t1
  susat
  1x4
  leupold cq t
  specterdr
  holographic sight
  cqt
  eotech magnifier
  cco
  rds

Your alternative for acog is not listed? Suggest!
Speaking about acog, one probably shouldn't forget about red dot.

Other search terms related to acog and their ratings are:
★★★★★ red dot
★★★★ rmr
★★★ night vision
★★★ buis
★★★ iron sights
★★ magnifier
★★ red dot on top
★ fixed front sight
★ pvs 14
★ aimpoint
cqb
m203
eotech
You have in mind a companion for acog and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of acog in all years. Click on graph for more.
acog
eotech
aimpoint