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Configure Your Custom AR-15 Barrel

Build a custom AR-15 barrel
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Cryogenics

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Using Adjustable Gas Block?

$280.00

NOTE:  PLEASE READ FIRST BEFORE ORDERING A .224 VALKYRIE OR .22 NOSLER CHAMBERED BARREL

On our custom AR barrel drop-down menu stipulations regarding the .224 Valkyrie and .22 Nosler chambering options, we have a note to the side of them shown as "(No 1/2" X 28 Thread)" because with the types of high pressures and extreme heat generated by those rounds and the concentration of both in such a small bore diameter, in some cases there isn't enough structural wall thickness at the crown with 1/2"x28 muzzle threads, and we've seen it quite often "bell out" after shooting a few rounds, noticeably reducing accuracy.  Our machinists and technicians put a lot into ensuring our barrels are extremely accurate, and we want them to maintain their accuracy potential for as long as possible.

Please ensure that if you're ordering a .224 Valkyrie or .22 Nosler barrel, and plan on having a threaded muzzle, that you select at least 5/8"x24 muzzle threads and not 1/2"x28.

 

We use Mil - Spec parts for testing. If any Non Mil - Spec (Adjustable Gas Block, Heavy Buffer, Reinforced Springs, Light/Heavy BCGS, Piston Systems) parts are used, X-Caliber must be contacted. If not your firearm may not cycle properly.

 

FOR ENGRAVING OPTIONS FOR THIS BARREL, PLEASE CLICK HERE.

 

Our ARs are tested with mil spec buffer tubes and springs. Any changes could change the way your AR functions.  

 

Please check our Frequently Asked Questions for our current lead times.

 

Gas Block Selection

  • max length with .625 Gas Block - 16"
  • max length with .750 Gas Block - 24"
  • max length with .875 Gas Block - 28"
  • max length with .936 Gas Block - 28"

 

Gas Block Journal Length

All X-Caliber AR barrels are made to a 1.92" gas block journal length EXCEPT our Lightweight & Spaghetti contours which have a 1.00" length.  Some shorter barrel and gas system length combinations with will also require a 1" gas block journal length instead of the usual 1.92" to make enough room for engraving our production stamp at the top front of the barrel.

 

Hand Lapped

 

We only guarantee 1 MOA or less if a Rubber City Armory, JP Ent. or Young Mfg. bolt is headspaced to the barrel by X-Caliber Barrel & Mfg.

 

No Shipping outside the US

Lead Time 8-10 Weeks

Cerakote: Adds 1-2 Weeks to order lead time

Cryogenics: Adds 2-3 weeks to order lead time

Fluting: Adds 1 week to order lead time

 

To Engrave This Barrel:  Select all desired options and add this barrel to cart then click here.

 

For your crushwasher needs:

https://tromix.com/product/crush-washer/

or for only 1/2x28 crush washers:

https://www.joeboboutfitters.com/Crush-Washer-for-1-2X28-Barrels-p/jb-crushwasher.htm

 

For your gas tube needs:

www.whiteoakarmament.com

 

 

***************************

 

X-Caliber Barrel Break-In

Procedure Guide

 

When breaking in your new X-Caliber Barrel, you should perform appropriate fire and clean cycles to normalize the bore surface. Each fire and clean cycle consists of a certain number of rounds fired (one to five) followed by a cleaning procedure (see below for reference), to be completed a certain number of times (1-25). These vary depending on the type of steel of the barrel, bore/groove diameter, velocity and pressure of any given round, etc. This is to be used as a guide. Since our barrels are hand-lapped, each barrel may break in a little differently. Some barrels may require more or less shots or cycles to break in than what is listed here.

 

416R Stainless Steel: Fire One Round then Clean: Do this 5-10 times. Fire Three Times then Clean: Do this 1 time. Fire Five Times then Clean: Do this 1 time.

4140 Chrome Moly: Fire Once Round then Clean: Do this 5-25 times. Fire Three Times then Clean: Do this 2 times. Fire Five Times then Clean: Do this 1 time.

 

 Example: For a 416R Stainless Steel barrel, you would fire one round, then perform the cleaning steps outlined below a total of five to ten times (shoot 1 round & clean, done 5-10 times) before starting the three shot cycle where you would fire three rounds and then clean as outlined below, then proceed to fire five rounds then clean, completing the break-in procedure.

 

Each Firing Cycle (1 shot, 3 shot or 5 shot) should be followed by cleaning the bore (see steps below for reference):

 

1.)    Using a one-piece, coated cleaning rod with a properly sized bore brush (wet with your favorite non-foaming bore solvent), carefully clean the bore from the chamber end toward the muzzle (3-5 passes is usually sufficient). If you cannot clean from the chamber end, be sure to use a bore-guide so as not to damage the crown or muzzle end of the rifling. Let sit 30-60 seconds before moving on to the next step.

2.)    Push a dry patch down the bore. (2-3 times)

3.)    Put a few of drops of oil on a patch and push that down the bore so as to leave a thin film of oil inside the bore.

4.)    Begin a new cycle: Fire your next round or rounds in your next firing cycle and repeat cleaning as necessary.

  

It is recommended to keep a written tally of your current step within the process so if you get distracted you will know where you left off.

 

NOTE:  PLEASE READ FIRST BEFORE ORDERING A .224 VALKYRIE OR .22 NOSLER CHAMBERED BARREL

On our custom AR barrel drop-down menu stipulations regarding the .224 Valkyrie and .22 Nosler chambering options, we have a note to the side of them shown as "(No 1/2" X 28 Thread)" because with the types of high pressures and extreme heat generated by those rounds and the concentration of both in such a small bore diameter, in some cases there isn't enough structural wall thickness at the crown with 1/2"x28 muzzle threads, and we've seen it quite often "bell out" after shooting a few rounds, noticeably reducing accuracy.  Our machinists and technicians put a lot into ensuring our barrels are extremely accurate, and we want them to maintain their accuracy potential for as long as possible.

Please ensure that if you're ordering a .224 Valkyrie or .22 Nosler barrel, and plan on having a threaded muzzle, that you select at least 5/8"x24 muzzle threads and not 1/2"x28.

 

We use Mil - Spec parts for testing. If any Non Mil - Spec (Adjustable Gas Block, Heavy Buffer, Reinforced Springs, Light/Heavy BCGS, Piston Systems) parts are used, X-Caliber must be contacted. If not your firearm may not cycle properly.

 

FOR ENGRAVING OPTIONS FOR THIS BARREL, PLEASE CLICK HERE.

 

Our ARs are tested with mil spec buffer tubes and springs. Any changes could change the way your AR functions.  

 

Please check our Frequently Asked Questions for our current lead times.

 

Gas Block Selection

  • max length with .625 Gas Block - 16"
  • max length with .750 Gas Block - 24"
  • max length with .875 Gas Block - 28"
  • max length with .936 Gas Block - 28"

 

Gas Block Journal Length

All X-Caliber AR barrels are made to a 1.92" gas block journal length EXCEPT our Lightweight & Spaghetti contours which have a 1.00" length.  Some shorter barrel and gas system length combinations with will also require a 1" gas block journal length instead of the usual 1.92" to make enough room for engraving our production stamp at the top front of the barrel.

 

Hand Lapped

 

We only guarantee 1 MOA or less if a Rubber City Armory, JP Ent. or Young Mfg. bolt is headspaced to the barrel by X-Caliber Barrel & Mfg.

 

No Shipping outside the US

Lead Time 8-10 Weeks

Cerakote: Adds 1-2 Weeks to order lead time

Cryogenics: Adds 2-3 weeks to order lead time

Fluting: Adds 1 week to order lead time

 

To Engrave This Barrel:  Select all desired options and add this barrel to cart then click here.

 

For your crushwasher needs:

https://tromix.com/product/crush-washer/

or for only 1/2x28 crush washers:

https://www.joeboboutfitters.com/Crush-Washer-for-1-2X28-Barrels-p/jb-crushwasher.htm

 

For your gas tube needs:

www.whiteoakarmament.com

 

 

***************************

 

X-Caliber Barrel Break-In

Procedure Guide

 

When breaking in your new X-Caliber Barrel, you should perform appropriate fire and clean cycles to normalize the bore surface. Each fire and clean cycle consists of a certain number of rounds fired (one to five) followed by a cleaning procedure (see below for reference), to be completed a certain number of times (1-25). These vary depending on the type of steel of the barrel, bore/groove diameter, velocity and pressure of any given round, etc. This is to be used as a guide. Since our barrels are hand-lapped, each barrel may break in a little differently. Some barrels may require more or less shots or cycles to break in than what is listed here.

 

416R Stainless Steel: Fire One Round then Clean: Do this 5-10 times. Fire Three Times then Clean: Do this 1 time. Fire Five Times then Clean: Do this 1 time.

4140 Chrome Moly: Fire Once Round then Clean: Do this 5-25 times. Fire Three Times then Clean: Do this 2 times. Fire Five Times then Clean: Do this 1 time.

 

 Example: For a 416R Stainless Steel barrel, you would fire one round, then perform the cleaning steps outlined below a total of five to ten times (shoot 1 round & clean, done 5-10 times) before starting the three shot cycle where you would fire three rounds and then clean as outlined below, then proceed to fire five rounds then clean, completing the break-in procedure.

 

Each Firing Cycle (1 shot, 3 shot or 5 shot) should be followed by cleaning the bore (see steps below for reference):

 

1.)    Using a one-piece, coated cleaning rod with a properly sized bore brush (wet with your favorite non-foaming bore solvent), carefully clean the bore from the chamber end toward the muzzle (3-5 passes is usually sufficient). If you cannot clean from the chamber end, be sure to use a bore-guide so as not to damage the crown or muzzle end of the rifling. Let sit 30-60 seconds before moving on to the next step.

2.)    Push a dry patch down the bore. (2-3 times)

3.)    Put a few of drops of oil on a patch and push that down the bore so as to leave a thin film of oil inside the bore.

4.)    Begin a new cycle: Fire your next round or rounds in your next firing cycle and repeat cleaning as necessary.

  

It is recommended to keep a written tally of your current step within the process so if you get distracted you will know where you left off.

 

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Existing reviews
Worth the wait
Took a little longer than expected to receive due to unforeseen circumstances but VERY worth the wait. Customer service was truly outstanding.  Got a Stainless 16" HBAR in .300BLK, Pistol gas, 1-8.  Got it zeroed and am shooting sub MOA at 100yards with 147gr supers.As an apology for the late delivery they included the X-terminator break. Fits well and works well. Will be ordering my Barrels from here for all my future builds. AR-10 in 6.5 creedmore next.
From: Christopher | Date: 4/30/2017 11:55 AM
Was this review helpful? Yes No (2/0)
Yes... It is worth the wait
I ordered a 12.7 x 42mm in a Chrome-moly, with nitride and cryo treatments.  It took quite some time; almost 5 months for the order to come through.  Upon assembly, the fit and finish are second to none.  The gas block fit (and I purchased a high quality one) was incredible.  Perfect.  I took it out to the range this past weekend for the first time and I was getting consistent groups sub-2".  Considering this barrel is throwing .50 cal/350gr bowling balls down range, that's amazing.  I expect it'll only get better as I spend time with the rifle.  Couldn't be happier.  X-caliber is definitely a top tier barrel manufacturer.  I'll be back for more!
From: Owen | Date: 10/11/2017 7:37 PM
Was this review helpful? Yes No (0/0)
6.5 Grendel Type II .136" 20 inch Beauty
Beautiful barrel that shoots amazing.1.7 twist works real well with 140gr Hornady pills out to 600 plus yds. 3/8 Moa at 100 yds and if the shooter was better, its light out. Cant go wrong with X-Caliber. Sandstorm AZ
From: John | Date: 12/24/2017 1:53 PM
Was this review helpful? Yes No (0/0)
300 blackout
Bought a 18 inch 1/9 and shot it for first time today. I gotta say I am a xcalibur man from now on!! Mid length they even opened up gas port to work with the mid length stroke and the gun ran flawless. Loaded h110 and cfe blackout with 125 noslers. 5 shots under a nickel and THTS with an ok rest and factory trigger. I am so happy with the quality and all my barrels will be coming from here. After trouble with lothar walther and the customer service and tooling marks left in barrel I have found a barrel maker tht stands behind there products and THTS xcaliber.
From: Orry | Date: 1/29/2018 5:05 PM
Was this review helpful? Yes No (0/0)
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