The best replacement for nail gun is hand nailed roof.

The best alternatives to nail gun are rated as following:
★★★★★  hand nailed roof
★★★  staple gun
★★★  brad nailer
★★  finishing nail gun
★★  brad nail gun
★★  straight nail gun
★  brad gun
★  air nail gun
★  hammer roofing
★  cordless nail gun
  paslode
  hand nail roof

Your alternative for nail gun is not listed? Suggest!
Speaking about nail gun, one probably shouldn't forget about air compressor.

Other search terms related to nail gun and their ratings are:
★★★★★ air compressor
★★★ compressor
★ built in compressor
no compressor
You have in mind a companion for nail gun and it is not yet here? Propose!



Google Trends

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nail gun
hand nailed roof
staple gun