The best replacement for grip is gaffer.

The best alternatives to grip are rated as following:
★★★★★  gaffer
★★★★  weak grip
★★★★  drift
★★★  overgrip
★★★  strong grip
★★  single minded fury
★★  drift faster
★  overlapping grip
★  rapid fire
★  wide grip curls
★  steady aim
★  stock shotgun
★  kick mw3
★  wide grip bench press
★  strong golf grip
★  kick
★  close grip bench press
★  kick lmg mw3
★  traditional grip
★  matched grip
★  smf
★  traction
★  interlock grip
  full stock
  close grip bench
  power grip
  overlap grip
  sound juicer
  magpul
  extended mags
  tight grip
  techspec
  wide grip rows
  overlap
  straight grip
  wide grip seated rows
  quaife
  response trigger
  interlock
  no grip
  wide grip
  durabak
  close grip pulldowns
  grasp
  autosock
  narrow grip pullups
  vice grip
  weak
  precision grip
  baseball grip
  mob grip
  vardon grip
  belly putter
  wide grip pull ups

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

Other search terms related to grip and their ratings are:
★★★★★ bipod
★★ tape
★★ right hand
★ bionic hand
★ slide hammer
stock
You have in mind a companion for grip and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of grip in all years. Click on graph for more.
grip
gaffer
weak grip