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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

  • 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 SHAW barrels are made from high quality steel, 4140 Chrome Moly with Melonite coating, or 416 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, 308 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.