R.U.M. / Builds

Custom builds.

Rifles built to order on the AR-15 platform and finished under our roof: from a no-nonsense carbine to a numbered colorway that never runs again. A complete platform, not a parts pile, and you can test-fire and zero it next door at Top Gun.

Booking now: spec'd uppers. Complete rifles are built and transferred the day our FFL is issued; send the request now and we'll spec yours.

01 · THE BUILD

Built to your use

Spec'd with you · finished & marked in-house

Tell us what the rifle is for and what you already like. We spec the barrel, gas system, trigger and furniture around it, then coat and mark it in-house so the finish is part of the build, not an afterthought.

  • PlatformAR-15 · 5.56 NATO · .300 Blackout
  • FinishCerakote + laser work, done under our roof
  • PartsSpec'd to your use, or built around parts you bring
  • PapersNumbered builds ship with a Letter of Marque
  • Transfer4473 & background check at our counter, or shipped to your FFL
  • PriceFlat labor + parts: see the menu below
Request a build See finished work
Next door

Zero it at Top Gun

R.U.M. is attached to Top Gun Shooting Sports (4075 W Outer Rd, Arnold). Pick up your build, then test-fire and zero it on their indoor lanes, take a class, and grab ammo, all in one stop.

How a build runs

Four steps

Spec it

Send the request below. We talk through use, caliber, barrel and finish until the spec is right.

Quote

You get the parts list, the finish and a price before anything is ordered.

The build

Assembled, coated, marked and function-checked on our bench.

Transfer

Picked up at our counter or shipped to your FFL, with a 4473 and background check either way.

Straight answers

Questions

Can I bring my own parts?

Usually. Tell us what you have and we'll say what fits the build and what we'd swap.

Can I add laser work or Cerakote?

Yes: tick the box on the form, or ask for the bespoke package (build + Cerakote + laser), priced by consultation.

What about the drops?

Numbered drops are their own thing: join the Crew on the home page to hear first.

Will you show my build online?

Only if you tick “OK to feature” on the form, and never with a serial number in the frame.

Custom builds

Request a build

Tell us what it's for and what you like. A real person writes back to set the spec and the price.

Please don't send serial numbers or ID through this form. We'll handle those in person, the compliant way. This site keeps a note of which link brought you here (for 90 days, on this site only) so we know which posts are worth making.