The best replacement for m320 is m203.

The best alternatives to m320 are rated as following:
★★★★★  m203
★★★★  m26
★★★  xm25
★★  lvg
★★  medkit
★  t4400
  m320 buck

Your alternative for m320 is not listed? Suggest!
Speaking about m320, one probably shouldn't forget about m4.

Other search terms related to m320 and their ratings are:
★★★★★ m4
You have in mind a companion for m320 and it is not yet here? Propose!



Google Trends

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m320
m203
m26