Description
Building or servicing an AR-15 or LR308 the right way comes down to torque, and guessing your way through a barrel nut or castle nut is a fast way to ruin good parts. The Wheeler XL F.A.T. Wrench with Mil-Spec Crowfoot Set takes the guesswork out of it. The ratcheting 1/2-inch drive torque wrench adjusts from 10 to 150 ft-lbs, giving you a wide enough range to handle everything from delicate accessory mounting all the way up to cranking a barrel nut to spec. Dial your number, pull until it clicks, and you know the fastener is seated exactly where it needs to be.
What the XL F.A.T. Wrench Crowfoot Set Actually Covers
Three dual-ended crowfoot wrenches ride along in the kit, and between them they knock out eight different jobs on the AR platform. You get an AR-15/LR308 mil-spec barrel nut crowfoot, a 5/8 inch to 3/4 inch crowfoot sized for buffer tubes and muzzle devices, and a castle nut crowfoot for locking down your receiver extension. That trio hits the fasteners most builders wrestle with, so you are not stopping mid-project hunting for the right tool.
Built to Take a Beating
The crowfoots are made from hardened steel, so they hold their shape and shrug off the kind of leverage AR assembly throws at them. When you are done, everything drops back into a latching hard-sided case that keeps the wrench, crowfoots, and small parts organized and protected on the bench or in the truck.
Whether you are a first-time builder putting together a home project or a gunsmith turning wrenches all day, this kit consolidates the torque tools you reach for most into one tidy package. It is a straightforward way to get repeatable, accurate results every time you touch a rifle.
Key Specifications
- Manufacturer: Wheeler Engineering
- Model: Delta Series
- Manufacturer Part Number: 1199887
- UPC: 661120749301
- Torque Range: 10 to 150 ft-lbs
- Drive Size: 1/2 inch ratcheting
- Crowfoot Wrenches Included: 3 dual-ended (8 functions)
- Crowfoot Material: Hardened steel
- Platform Compatibility: AR-15 / LR308 mil-spec
- Case: Latching hard-sided case
- Color: Black
- Product Type: Torque Wrench Kit
What’s Included
- XL F.A.T. Wrench (ratcheting 1/2-inch torque wrench, 10-150 ft-lbs)
- AR-15/LR308 mil-spec barrel nut crowfoot wrench
- 5/8 inch to 3/4 inch buffer tube and muzzle device crowfoot wrench
- Castle nut crowfoot wrench
- Latching hard-sided case
Frequently Asked Questions
What torque range does the Wheeler XL F.A.T. Wrench cover?
The XL F.A.T. Wrench adjusts from 10 to 150 ft-lbs, which is a wide enough spread to handle both light accessory work and heavy jobs like barrel nut installation. That range covers essentially every fastener you will encounter on an AR-15 or LR308 build. You just set your target value and pull until it clicks.
Which crowfoot wrenches come with this Mil-Spec set?
This kit includes three dual-ended crowfoots: a mil-spec barrel nut crowfoot for AR-15 and LR308, a 5/8 to 3/4 inch crowfoot for buffer tubes and muzzle devices, and a castle nut crowfoot. Between them they perform eight different functions. If you need broader coverage, Wheeler also offers a Complete set with five crowfoots that handles twelve tasks.
Will the Wheeler XL F.A.T. Wrench work on both AR-15 and LR308 rifles?
Yes. The barrel nut crowfoot is sized for mil-spec AR-15 and LR308 barrel nuts, and the torque wrench itself has plenty of range for both platforms. It is aimed squarely at builders and gunsmiths working on these rifles.
Does it come with a case for storage?
It does. Everything ships in a latching hard-sided case that keeps the wrench and all three crowfoots organized and protected. That makes it easy to grab the whole kit for bench work or toss it in the truck for range-side maintenance.





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