We recommend the following procedure:

  1. Ensure barrel is clean – no oil,
  2. Shoot 5 rounds of copper-jacketed bullets through the barrel,
  3. Run a few patches with (non-copper removing) standard gun cleaning solvent through the barrel and patch dry,
  4. Shoot 5 more rounds,
  5. Continue this cycle (Steps 3&4) at least 3 more times (for a total of 20 rounds), with an optimal total of ten cycles (50 rounds),
  6. Store barrel with a light coat of oil. Patch oil prior to shooting.
Columbia River Arms offers a 10% discount to active-duty, retired and former military and law enforcement personnel.

Note: Industrial Barrels are excluded from discounts.  Tiered pricing is available based volume purchases

Please send an email to sales@columbiariverarms (with “Military” or “Law Enforcement” as the subject line) to be issued a coupon code for the discount. Your code will not expire, is not transferable, and cannot be combined with other offers.

Les Baer Custom designed the .264 LBC cartridge to be completely compatible with the 6.5 Grendel, and our head space gauges are marked with both cartridges.

The LBC has a .295 diameter neck, while the Grendel has a .300 neck.

The LBC has a straight taper in the throat, while the Grendel has a compound taper in the throat.

The LBC has a straight taper in the throat, while the Grendel has a compound taper in the throat.

The LBC uses 7.62×39 AR bolds with .125 head spacing, which is the standard head spacing for all AR rifles and most modern bolt actions, while the original Grendel used a Grendel bolt with .135 head spacing.

We originally made rifles with the standard head spacing (.125”) which we called type 1 and a second head spacing (.135”) only for the original Grendel which we called type II. Given the demand for standardization and lack of sales the type II head spacing has been dropped for 2017.

Both cartridges, by design, only require standard AR15 buffers, buffer tubes and springs.
Every effort is made to make sure that no minuet burr occurs. In the event that a burr in the bore is seen. It is caused by the drilling process and can be easily removed from the bore with a cleaning rod and patch. If a burr is found and you are uncomfortable with its removal with a cleaning rod or first shot, please contact us
We do not ship our products outside of the United States.
In the past, Columbia River Arms has manufactured many kinds of custom replacement barrels for our customers. Though it has proven not to be cost effective to produce at this time.
On our black oxide barrels are processed using a process that has be around for generations and is the standard finish for all civilian and military uses. DTL-13924 hot bath black oxide, which includes alternate specifications AMS 2485, ASTM S 769, and ISO 11408.

We had added a HS-84 (shot peening) preparation of the part.  The overlapping dimples from shot peening create a uniform layer of compressive stress at metal surfaces.. This surface preparation Has long known advantages and is widely used throughout the aerospace and firearms industry.

Alternative finishes or treatments other than that offered by CRA are not recommended. and Expressly voids any warranty. Such activates often involve elevated temperatures or possible induction of hydrogen

Our barrel steel comes to us heat treated. With our black oxide system, the barrel only gets heated to 286° whereas a nitride process heats the barrel to between 1050° and 1200°. This would ruin our heat treat. Other manufacturers use the nitride process as their heat treat process. We control for heat throughout the manufacturing process.

Due to the countless manufacturers of rifle bolts and gauges, it is extremely difficult to make all barrels’ headspace uniformly with all gun bolts and actions. BHW/CRA uses go and no go gauges supplied by Pacific Tool and Gauge that are set to the industry standard. We also employ gauge standards for AR 15 and AR 308 bolts as measured from the base of the locking lugs (locking surface) to the bolt face. We have jig fixtures to measure bolts, gauges and use a solid one piece gauge that eliminates the need for the use of AR bolts during the manufacturing process.

We cannot alter our product to match your personal bolt. If we were to alter our product beyond our standards for your bolt. And the barrel bolt combination were ever to become separated for any reason. We would have an issue of having a barrel on the market that does not meet accepted factory standards.

Production Barrels are equivalent to a fleet work truck with white paint, cloth seats and a radio, where branded Black Hole Weaponry barrels are the top-of-the-line luxury truck with a beautiful paint job, leather seats, state-of-the-art entertainment system, and performance-tuned engine.

Both of these trucks share the same structure and reliability, but one offers utility while the other boasts fine-tuned performance and style.

Production Barrels are made from the same top-tier materials, but are constructed mechanically, while Black Hole Weaponry barrels continue on through even stricter quality assurance processes, hand finishing, hand polishing, and are available with a nearly limitless variety of finishing and fluting options.

Please do not send us your bolt. We do not manufacture bolts nor are we able control the manufacturing processes of other vendors. Your barrel is one of the primary components of your rifle. Given the number of high quality manufacturers of bolts, seamless integration is generally the rule with our product.
Your personal bolt may be required to manufacture specific non-standard “wildcat” chamberings. CRA cannot guarantee the performance or safety of your personal bolt after manufacturing is complete and your barrel is delivered. Additional shipping fees may apply.
Why did it take so long to get my barrel?

BHW barrels are crafted to-order and involve many hand operations. Barrels are manufactured in batches of like kinds to speed the production times. Often given the volume of barrels in production at any given time your individual barrel will be moving through the system along with the other barrels. Sometimes it takes more time than projected to get through the system.

Please CLICK HERE to submit an inquiry form to check on your quality barrel.

If you do not see what you want please CLICK HERE to drop us a note.
Pencil Standard, National Match, Light Semi-Bull Bull C5
.625″ .750″ .875″ .936″ .750″


Our gas block lengths: 1.062″ (except for M4: 1.710″ for use with A2 Front Sight Post)