The best replacement for bushing is bearing.

The best alternatives to bushing are rated as following:
★★★★★  bearing
★★★  bull barrel
★★  bushingless 1911
★★  coupling
★★  reducer
★  ball bearing
★  pilot bearing
★  grommet
★  bearing airsoft
★  ball joint
  bull barrel 1911
  spacer
  reducing coupling
  needle bearing
  rubber bushing
  bushingless
  g uni bushing

Your alternative for bushing is not listed? Suggest!
Speaking about bushing, one probably shouldn't forget about lock nut.

Other search terms related to bushing and their ratings are:
★★★★★ lock nut
★★★★★ dom sleeve
★★★ compensator
You have in mind a companion for bushing and it is not yet here? Propose!



Google Trends

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bushing
bearing
bull barrel