Nucleus – 7mm PRC – Prefit Barrel


The Nucleus/Mausingfield/Archimedes actions from American Rifle Company are extremely repeatable, so nice in fact, we are able to offer prefit barrels for their actions configured in a shouldered barrel. This means there is no barrel nut to worry about, with the use of a barrel vise you can spin off an old shot-out barrel and ours will thread directly back on and headspace correctly to your bolt.

Installation is seriously simple, just watch this.



Please note: While we are responsible for making you a quality product, You are liable for how this product is ordered. It is your responsibility to verify the head spacing and breech specs beforehand; we do not refund incorrectly, custom-ordered products. Any changes to orders must be made within 48 hours of order placement.

The current estimated build time is 10-12 weeks or longer.

Additional information

Weight N/A

American Rifle Co – Nucleus/Mausingfield/Archimedes


7mm PRC (new)

Twist Rate

5R 1:8"

Muzzle Threading

5/8"x24 + cap

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