FAXON MATCH-X SERIES TARGET PROFILE 18" MID-LENGTH 6.5 GRENDEL AR15 BARREL

What “Honed & Lapped” Actually Means

A barrel bore starts as a drilled and reamed hole. Reaming leaves a surface finish around 32 Ra, which is good enough for a duty barrel and is where most stainless match barrels stop before the rifling button goes through. On a MATCH-X barrel the reamed bore is honed to 8 Ra, a fourfold improvement, before it is button rifled. The point of honing first is the button: it forms the lands and grooves by displacing steel rather than cutting it, and it can only produce a surface as clean as the one it starts from. A profilometer checks the honed finish and a borescope checks for tool marks before the barrel moves on.

Rifling roughens that surface again, and so does everything that follows. The button cold-works the bore at very high pressure, raising the grain along every land edge; the 1150°F stress relief lets the steel relax and leaves a thin surface oxide; and contouring and chambering release more stress and move the bore by a few ten-thousandths. So after all of that machining is done, the bore is lapped back to 16 Ra, polishing lands and grooves together so the bullet sees one uniform surface from throat to crown. For scale, 16 Ra is the finish class of a ground crankshaft journal or a hydraulic valve spool, and it is smoother than the brushed stainless on a refrigerator door, which runs 25 to 40 Ra.

Why it matters: the smoother the bore, the less copper and carbon it holds, the more uniform the friction on every bullet, and the more consistent the velocity from shot to shot. That shows up as tighter vertical dispersion at distance, a shorter break-in, and a barrel that cleans in a fraction of the passes. Faxon then button-rifles the honed bore with 5R geometry, five lands with sloped sides instead of the sharp corners of conventional rifling, which deforms the jacket less and fouls less again.

The other MATCH-X difference is the outside. Match Series barrels are nitrided; MATCH-X barrels are left as bare 416-R stainless, blasted with S110 media for a uniform matte finish. The bore is plugged and the extension, muzzle threads, and gas port are masked during blasting, so the media only ever touches the exterior. Nothing is added to the steel, so nothing can affect the bore, and the matte stainless surface is thermally stable and easy to keep clean. The trade is that bare stainless wants a wipe of oil after wet or humid use, the same as any stainless match barrel.

What’s Included

How It’s Built and Inspected

1. 416-R stainless bar is gun-drilled and pull-reamed from the chamber end, then honed to 8 Ra. Bore diameter is checked with go/no-go pins, finish with a profilometer, and the surface with a borescope.

2. The bore is button-rifled with a 5R, 1:8 right-hand twist (.2645–.2665″ groove), then stress relieved at 1150°F for a minimum of four hours. Bore and groove diameters are air-gauged at three points along the length.

3. The blank is chopped, re-centered, and profiled between centers: Target contour, .750″ gas journal held to .001″, 5/8x24 muzzle threads, and the recessed crown.

4. The 6.5 Grendel chamber is cut and verified on a CMM and borescoped for an even lead. The rifled, chambered bore is then lapped to a 16 Ra finish, bringing lands and grooves to one uniform surface from throat to crown. Every barrel is magnetic-particle inspected.

5. The nickel-Teflon M4 extension is torqued to 150 ft-lb, the gas port is drilled and reamed to .078″, the extension is pinned, and headspace is checked with a 6.5 Grendel go/no-go gauge. Finally the exterior is blasted with S110 media for the uniform matte finish, with the barrel plugged and the extension, muzzle threads, and gas port masked so the media never touches a sealing or bearing surface.

MATCH-X 18″ Target 6.5 Grendel FAQs

What is the difference between MATCH-X and Match Series?

Both are 416-R stainless with 5R button rifling, a nickel-Teflon extension, and a recessed target crown. MATCH-X adds a bore that is honed to an 8 Ra finish before rifling and brush-lapped to 16 Ra after machining, and leaves the exterior as uncoated, S110-blasted stainless instead of nitride. Match Series is the nitrided, harder-wearing choice; MATCH-X is the smoother-bore, maximum-consistency choice.

Do I need a special bolt for 6.5 Grendel?

Yes. 6.5 Grendel uses a larger case head than 5.56, so it needs a 6.5 Grendel bolt with a .136″ bolt face. This barrel has a Type II chamber, which pairs with a Type II bolt; that is the current industry standard and what nearly every Grendel bolt sold today is. A 5.56 bolt will not headspace and must not be used. You also need 6.5 Grendel magazines; the carrier, upper, and buffer are standard AR-15.

What is the Target profile, and what does it weigh?

2.64 pounds. The Target profile is .900″ from the chamber to the gas block and .730″ from the gas block to the muzzle, the stiffest and heaviest contour in the MATCH-X line. Stiffness is what keeps groups together as the barrel heats through a string, so it is the right choice for a precision rifle shot from a bipod or bench. It is not the barrel for a lightweight hunting carbine.

What bullet weights does the 1:8 twist stabilize?

Everything the cartridge is loaded with, from 90 gr varmint bullets through the 120 to 130 gr match and hunting bullets that give 6.5 Grendel its reputation at 600 yards and beyond. 1:8 is the standard twist for the cartridge and it fully stabilizes the long 123 and 130 gr bullets at 18″ velocities.

Why 18 inches for 6.5 Grendel?

6.5 Grendel was designed around an 18 to 20″ barrel, where it reaches the velocity that keeps its high-BC bullets supersonic well past 1,000 yards. An 18″ barrel gives up very little to a 20″ while keeping a rifle balanced, and the mid-length gas system on this barrel gives it a soft, smooth impulse.

Do I need to break in a honed and lapped barrel?

Less than a conventional barrel. Break-in is mostly the process of shooting the tool marks smooth; the honed and lapped 16 Ra bore has already done most of that. Clean after the first range session, then shoot it. Expect it to copper-foul lightly and clean quickly.

How do I care for an uncoated stainless barrel?

416-R is a stainless alloy, but it is not immune to corrosion. Wipe the exterior with a lightly oiled cloth after shooting in rain, humidity, or after handling with bare hands, and run a patch with oil through the bore before storage. That is the only maintenance difference from a nitrided barrel.

Is the barrel extension installed and headspaced?

Yes. The nickel-Teflon M4 extension is torqued to 150 ft-lb, pinned, and the assembly is checked with a 6.5 Grendel go/no-go gauge before it ships. Install it in a mil-spec upper with a standard barrel nut and a 6.5 Grendel bolt; no additional headspacing is required, though checking headspace with your own bolt is always good practice.

Faxon Lifetime Guarantee. Covers manufacturing and material defects to the original purchaser. Excludes damage from misuse, neglect, improper installation, non-standard ammunition, or modifications. Bore erosion and finish wear from normal use are not defects. Register your product at faxonfirearms.com/product-registration to expedite service. Full terms: faxonfirearms.com/warranty-privacy-terms.

Dimensions and tolerances are nominal from Faxon engineering drawings. Gas block, gas tube, barrel nut, and muzzle device not included. Barrels are firearm components; verify function and headspace with your bolt before firing, and confirm reliable cycling with your ammunition and gas block setting. Teflon® is a registered trademark of The Chemours Company FC, LLC.

For questions, contact customerservice@faxonfirearms.com.