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  1. Good, but...
    Robust, solid tool, but does not fit my Stag-10 nor Aero Precision barrel nuts.

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AR-10/AR-15 Free-Float Armourer's Wrench

60% of 100
In stock
688737046556 688725

This specialized tool is designed to perform important screwing jobs when working on your AR-15 or AR-10/AR-308 (full list at the bottom of this page). Tailored for folks who only work with free-float handguards, it saves on size and weight by not having the rippled wrench for basic USGI barrel nuts.

There is a square hole for a 1/2" torque wrench (not included) to get the perfect amount of torque on your barrel nut (though many people use a calibrated wrist).

We also sell barrel nut grease to prevent thread seizing.


  • Steel
  • Can open a lobster and/or a mobster like a boss but this is off-label usage
  • Weight: 355g

You get:

  1. AR-15/AR-10 armourer's multi-tool

Compatible with:

  • Buffer tube
  • Buttstock castle nut
  • Pinhole-style handguard barrel nuts (usually seen on full-size free-float handguards) for both AR-15/M16 and AR-10/AR-308
  • Locking rings on AR-15 or AR-10/AR-308 free-float handguards
  • Muzzle devices with 3/4" or 5/8" flats
  • A2 buffer tubes with the old 3/4" flats

NOT compatible with:

  • Standard USGI AR-15/M16 and AR-10/AR-308 barrel nuts
  • Lightweight/low-profile or other handguards that use a special wrench