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  • $ 17500

Barrel Flute Weight Savings Calculator

Enter all measurements in inches
See flute patterns
Estimated Weight Savings:


The industry standard elevated to a fresh look with our exclusive cutter style. The finished piece emulates the appearance of a splined axle. (Depth and flute count may vary depending upon caliber, cartridge selection, and barrel contour).

"Straight with a twist." Some additional CNC code transforms the industry standard straight pattern to a whole new look. The rate of twist is almost infinitely variable. If you want to "twist it up", just tell us how much to go! (Depth and flute count may vary depending upon caliber, cartridge selection, and barrel contour)

Weight reduction.  Probably the single most asked question regarding fluting a barrel.  We recognize the need for lighter weight guns where every ounce counts.  Use our online fluting calculator above to give an approximate estimate of the amount of weight reduction you can expect from having your barrel "wrinkled up". 

LongRifles, Inc. offers a broad range of barrel fluting options.  Straight, helical, diamond, and interrupted or "skip" fluting is available.  Our cutter geometry delivers a unique "industrial appearance" while avoiding the  the razor sharp edges common to deeply fluted barrels.  The use of CNC machining centers, modern insert cutter geometry, and rock solid work holding allow us to deliver inclusion free surface finishes for an exceptional presentation when left "in the white" or coated with Cerakote.


UPDATE: 3.28.2016:

We have a new pattern/style available.   "Wrought Iron" is our newest "twist" on barrel fluting.

We also have this pattern available for bolt fluting.  When matched it's a nice way to complete a rifle


UPDATE 6.13.19:

LRI has a new fluting pattern:  "Bee Hive".    A little different from the typically seen hexagon pattern.  Ours preserves the barrel contour down inside the pocket of the hexagon.  The finished piece appears as though a barrel got stuffed inside some really "kinky" fish net stockings.  






We've performed this service to hundreds of barrels using both the single point and button rifling methods of manufacturing.  It's been demonstrated over and over again that our process has zero effect on accuracy.

Barrel fluting is largely cosmetic.  Because of this we prefer our clients to allow us some "artistic freedom" with the flute count and depth.  Because of the cutter design, sometimes it's beneficial to increase or reduce the number of flutes so that the finished appearance is symmetrical.  This is one of the rare cases in machine work where "if it looks right, it is right." 


Please allow for a 5-8 day rotation on delivery


IMPORTANT NOTE:  Barrel fluting is an invasive machining process that is very, very dependent upon solid and stable work holding.  Failure to respect this fact leads to fluting work riddled with tool chatter and other inclusions.  We have a well vetted process for ensuring a visually clean appearance in our work.  However it is not without peripheral consequence.  IF your barrel is coated, blued, blasted, or "finished" in any way on the outside of it, it is very, very likely that we WILL scratch, burnish, or mark the finish.  There is absolutely no way to avoid this.  Retaining this service means LRI will not accept or be subject to any liability in any capacity.  Please take this into consideration prior to retaining us for this kind of work.  New barrels are of zero consequence as we do all of our finishing work after machining.





The prices quoted for our barrel fluting services are for bolt action rifles and AR-15’s where the barrel is threaded to the receiver or contained by a barrel extension.

The full scope of possible attachment methods is outside of our scope to completely anticipate as the variances are almost infinite.   LRI reserves the right to apply additional tooling costs when the application requires it.  As always, you will be notified prior to any work being completed.  If you elect to proceed, you will be billed upon completion. Special tooling starts at $125 and up.

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