The best replacement for g33 is g31.

The best alternatives to g33 are rated as following:
★★★★★  g31
★★★★  p35
★★★  g27
★★★  g23
★★★  q35
★★★  g30
★★★  g36
★★  g43
★★  g965
★  g29
★  g32
★  g26
  aimpoint magnifier
  g41
  intel p35

Your alternative for g33 is not listed? Suggest!
Speaking about g33, one probably shouldn't forget about 512.

Other search terms related to g33 and their ratings are:
★★★★★ 512
★★ aimpoint t1
You have in mind a companion for g33 and it is not yet here? Propose!



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g33
g31
p35