Real Avid MASTER-FIT A2 Crowfoot Wrench Set, 5-Piece

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BLACK RAPTOR QUICK CHECK

MASTER-FIT A2 Crowfoot Wrench Set: four specialized crowfoots plus 1/2-inch torque wrench for defined AR/A2 bench tasks – not a universal tool for every barrel nut or muzzle device.

20-/4-hole free-float barrel nuts
Standard and extended castle nuts
3/4- and 5/8-inch muzzle devices; 5/8 also for A2 fixed stock extension tubes
Torque wrench 10–150 ft-lb


Fits well / rather doesn’t fit


Fits well if several of the covered A2 work points occur regularly and a suitable 1/2-inch torque wrench is still missing.


Rather doesn’t fit if only a single crowfoot is needed, a suitable torque wrench is already available, or proprietary component geometries are being worked on.


What the five main parts cover


Barrel Nut Crowfoot For confirmed 20-hole and 4-hole free-float barrel nuts. Do not infer other hole patterns or proprietary nuts.


Castle Nut Crowfoot For standard and extended castle nuts, provided the specific geometry fits.


Muzzle Devices One crowfoot each for 3/4 and 5/8 inch; the wrench size is not the same as the thread.


Torque Wrench 10–150 ft-lb, 45 teeth, 8° working angle and ±4% manufacturer specification. This is the tool range, not a component target value.


Limits & Risk of Wrong Purchase

No universal torque value: the instructions of the specific component are decisive.
The set does not replace a suitable upper/receiver holding fixture.
Crowfoot geometry must fully and play-free engage; visual similarity is not enough.
Crowfoot position on the torque wrench can change the effective lever length.

Practical / Instructor Tip
Confirm the tool chain before setting: check component, crowfoot, holding fixture, and target value separately first. Then set the torque wrench. In case of in
line-mounted Crowfoot, observe the torque wrench manufacturer's instructions for lever length correction; at 90° the usual effective length generally remains unchanged.
Technical Data & Practical Interpretation


Set Contents
4 Crowfoot wrenches + 1 torque wrench; holding rail/case complete the storage.


Drive
1/2 inch.


Torque Range
10–150 ft-lb – tool range, no assembly recommendation.


Ratchet
45 teeth, 8° working angle; torque function in both directions.


Accuracy
±4 % according to manufacturer.


Manufacturer No.
AVMF5WS – discreet for identification.


Scope of Delivery


1 × Crowfoot for 20-/4-hole free-float barrel nuts
1 × Crowfoot for standard/extended castle nuts
1 × 3/4-inch muzzle device Crowfoot
1 × 5/8-inch muzzle device/A2 fixed stock Crowfoot
1 × 1/2-inch torque wrench
Holding rail and hard case

Holding device, firearm components and assembly consumables are not included.

Sensible Single Alternative
If only the 5/8-inch geometry is missing, the single MASTER-FIT 5/8-inch Crowfoot is the slimmer solution.
FAQ
Why five-piece with four Crowfoots? The torque wrench is the fifth main part of the set. Which barrel nuts are covered? Confirmed are 20-hole and 4-hole free-float barrel nuts. What torque should I set? Exclusively the value of the specific component or firearm manufacturer. Is a firearm holder included? No. A suitable, system-compatible holding device is required separately.
Black-Raptor Classification: Strong for a regularly used AR-/A2 workbench when several of the covered geometries and a torque wrench are needed. For only one work point, a single Crowfoot is more economical.