Obermeyer Approved 5-R™ Style Rifling Now Available!

Thanks to approval by Boots Obermeyer, Krieger Barrels, Inc. is now offering the true Obermeyer 5-R™ rifling pattern as an option on limited calibers with our barrels.

At this time we are limiting the 5-R™ option to the calibers listed below, but may offer others in the future as greater demand arises.

Please note: We are not, and have no plans to offer 5-R™ rifling in our finished 'Gas Gun' lines of M14, M1 Garand, AR-15, and AR-10 variants. Also, we are not offering 5-R™ in gain twist at this time. 

5-R™ rifling is ONLY available in standard bore/groove dimensions listed and standard twist rates at this time. Please call if you have questions about availability of a certain caliber/twist combination.

There is a $30.00 up-charge to the base cost of the barrel for 5-R™ rifling.

Currently available calibers with 5-R™ rifling:

6mm (.236" & .237" bore diameters, .243" groove)

6.5mm (.256" bore, .264" groove)

7mm (.277" bore, .284" groove)

.30T Palma (.298" bore & .3065", .3070" & .3075" groove diameters)

.308 cal (.300" bore, .308" groove)

NOTE: 1-11.25" Is now a standard twist for both 5-R™ and conventional style rifling for .308 caliber barrels.