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The ERS-15

Shaw Barrels Make the Difference!

Shaw Precision Guns is proud to now offer the Semi-Custom ERS-15 to our customers. With our new ERS-15 Gun Builder you have complete control with hundreds of design options. Choose the barrel, handguard, upper, and lower of your choice; all with a real-time estimate of cost as you build.


 Specifications that come from YOU, for the exact gun you’ve been looking for, but without the high price tag.

Offering Custom Options:

  • Three barrel lengths

  • Multiple Barrel Fluting

  • Multiple Barrel Finishes

  • Four Colors

Plus each Shaw ERS-15 comes included with:

  • High Quality Uppers and Lowers

  • Nickel-Boron Coated 9310 Bolt

  • Magpul Stocks

  • Optics Ready


Shaw engineers only premium grade barrels made by skilled craftsmen with years of experience, and utilizing the latest technology and metals. All ERS-15 barrels are made from high quality 416R stainless available in either a matte or polished finish. Barrel lengths are sixteen and eighteen inch (M4 or H-Bar), or twenty inch (Bull barrel only), all available with three different fluting options: straight, staggered, and Shaw’s patented Helical, in either 5.56 NATO or 300 AAC Blackout calibers.


Options exist with either a two piece Magpul MOE or a one piece T-MOD rail heat shield that is CNC machined from 6061 aluminum with a hard anodize or Cerakote finish. The T-Slot design allows you to adjust the accessory rails in many positions simply by loosening the rail screws and sliding to the desired location. The T-Marks are laser engraved for accuracy.

Uppers and Lowers

The uppers are expertly machined from 7075-T6 Aluminum forgings, and feature an attractive matte black anodized finish, dry film lube or Cerakote, with M4 feed ramps that are T-Marked.

All quality lowers are machined from 7075-T6 Aluminum forgings and precision wire EDM Magwell to avoid the stresses and distortion from broaching. Each features an attractive matte black anodized finish or Cerakote.