FAXON FX7 PREFIT M24 PROFILE 24" 1:7.5T 6MM ARC BOLT ACTION BARREL

Rifle Barrels › Bolt Action Barrels › FX7 Prefit Barrels › 24″ M24 6mm ARC  |  Works with: FX7 action • FX7 action wrench • .30 suppressors • 5/8x24 hub adapter

How the FX7 Prefit Works

A prefit barrel has its shoulder and chamber machined so that it headspaces correctly when it is torqued against a specific action. Faxon cuts this barrel’s shouldered 1.0625-16 tenon and chamber to headspace on the Faxon FX7 short action, so you do not need a lathe or a gunsmith to cut a chamber. Clamp the barrel in a barrel vise, turn the action onto it with the Faxon FX7 action wrench, torque it, and check headspace with GO and NO-GO gauges before you fire it.

FX7 Prefit barrels are made for the Faxon FX7 action only. Other Remington 700®-pattern actions vary in how far the bolt face sits from the receiver face, so a prefit cut for the FX7 will not reliably headspace on them. For a Remington 700® or a clone, choose a RemAge® barrel, which sets headspace with a nut.

Bolt face: 6mm ARC uses a 6.5 Grendel/6mm ARC-size case head, not the .308 Win-size bolt face. Make sure your FX7 has the bolt face for 6mm ARC before you install this barrel, and contact Faxon if you are unsure.

6mm ARC, 1:7.5 Twist

6mm ARC was designed by Hornady to run long, high-BC 6mm bullets from a short, efficient case. In a bolt gun it makes a light, quiet-recoiling precision or hunting rifle, and the 1:7.5 twist stabilizes the 103 to 108 gr bullets it was built around. Load data and ammunition are on Hornady’s 6mm ARC page.

The M24 Profile at 24″

The M24 is a heavy tactical contour modeled on the classic military sniper profile. It is stiff, slow to heat, and steady from a bag or barricade, which makes it the choice for precision rifle matches and long strings at the range.

How It’s Made

1. Drill and ream: 416-R stainless bar gun-drilled and reamed
2. Hone: Bore honed to a fine finish before rifling
3. Button rifle: 5R button rifled, 1:7.5 twist
4. Air gauge: Bore air gauged
5. Stress relieve: Stress relieved after rifling
6. Profile and thread: M24 profile turned, 1.0625-16 UNEF tenon and 5/8x24 muzzle threads cut, target crown
7. Chamber: 6mm ARC chamber cut and headspaced to the FX7
8. Lap: Bore lapped after chambering
9. MPI and nitride: 100% wet magnetic particle inspected, then salt-bath QPQ nitrided inside and out
10. Engrave and inspect: Laser-engraved with the cartridge and twist, then final inspected

Salt-bath QPQ nitride is a diffusion treatment, not a plating. It hardens the bore and exterior and adds corrosion resistance while adding virtually nothing to the dimensions, a few ten-thousandths of an inch, roughly a tenth the width of a human hair. It needs little to no break-in.

How We Inspect It

Faxon barrels are built to a written control plan, and each run is logged on inspection sheets. Here is what this barrel goes through before it ships.

What’s in the Box

What Owners Say

This barrel doesn’t have reviews on FaxonFirearms.com yet. If you own one, tell other shooters how it runs in the review section below.

Build It Out

Other 6mm ARC Bolt Action Barrels

See every barrel in this line on the FX7 Prefit Barrels page, or browse all Faxon bolt action barrels.

FX7 Prefit 24″ M24 6mm ARC FAQs

What actions does this barrel fit?

The Faxon FX7 short action only. The shouldered tenon and chamber are cut to headspace on the FX7. For a Remington 700® or a 700 clone, choose a Faxon RemAge® barrel, which sets headspace with a nut.

Do I need a gunsmith to install it?

No lathe work is needed. Clamp the barrel in a barrel vise, turn the FX7 action on with the Faxon FX7 action wrench, torque it, and verify headspace with GO and NO-GO gauges before firing. If you are not comfortable doing that, have a gunsmith install it.

Does 6mm ARC need a different bolt face?

Yes. 6mm ARC uses a 6.5 Grendel/6mm ARC-size case head, not the .308 Win-size bolt face. Your FX7 needs the matching bolt face for 6mm ARC. Contact Faxon if you are unsure what your action has.

What comes in the box?

The barrel and thread protector.

Why 416-R stainless and 5R rifling?

416-R machines cleanly and holds a consistent bore. 5R rifling uses five lands with sloped sides instead of sharp corners, which deforms the bullet less and fouls less. Faxon hones the bore before rifling and laps it after chambering for a smooth, consistent finish.

Does a nitrided barrel need break-in?

Little to no break-in. Salt-bath QPQ nitride hardens the bore and resists corrosion and fouling while adding virtually nothing to its dimensions.

Can I run a suppressor?

Yes. The muzzle is threaded 5/8x24. Use a .30 caliber or larger suppressor and confirm alignment before firing.

Where can I find 6mm ARC load data?

Hornady designed the cartridge and publishes ammunition and load data on its 6mm ARC page.

Where is it made?

In Greater Cincinnati, Ohio, and it is covered by the Faxon Lifetime Guarantee.

Remington® and Remington 700® are trademarks of Remington Arms; Savage® is a trademark of Savage Arms; RemAge® is a trademark of its owner. Faxon is not affiliated with Remington or Savage. HARMONIX® and MuzzLok® are trademarks of Faxon Firearms. Always verify headspace before firing, and know and follow all federal, state, and local laws.