The best replacement for handguard is quad rail.

The best alternatives to handguard are rated as following:
★★★★★  quad rail
★★★  drop in
★★  non free float
★  non free floating handguard
★  free float
★  free-float
★  two piece handguard
  daniel defense handguard

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

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



Google Trends

Scale is based on the average worldwide traffic of handguard in all years. Click on graph for more.
handguard
quad rail
drop in