Mutant Action

When Defiance Machine says it makes custom bolt actions that are more precise and accurate than anything in the firearms market, the Mutant is the perfect example. Designed exclusively for the Eliseo RTM/RTS Chassis System, this is a custom fit that works easily every time. The same close tolerances customers expect from Defiance. The same ease of use for the gun builder. The Mutant does exactly what you want it to do.

  • All materials are pre-hardened before machining to ensure dimensional stability
  • Wire EDM-cut, full-length lug ways provide smooth bolt operation and unsurpassed strength and rigidity
  • Actions available in Medium, Long, and XL lengths to accommodate all popular factory chamberings and extended length hand loads
  • Integral recoil ring adds incredible rigidity and rock-solid fit with the Eliseo chassis system
  • Bolt machined from one piece of pre-hardened 4340 chrome moly and threaded for interchangeable knobs
  • True one-piece bolt is unmatched in strength—multiple bolt fluting options available
  • Precision: Defiance primary extraction design significantly increases initial extraction and ensures smooth bolt cycling
  • Bolt face diameters available for all standard and wildcat cartridgestraction design significantly increases initial extraction and ensures smooth bolt cycling
  • Extractors are M-16 type and stronger than other designs
  • Medium actions are typically equipped with a magazine well to accommodate both the AI and AW detachable magazines
  • Long action magazine well accommodates AI single stack magazines and can be of SAMMI length or the longer CIP length for extended OAL cartridge loading
  • Right- and left-hand configurations available

MEDIUM ACTION (Model 700™ SA Length) – $1090 MSRP

416R SS, 1.350 OD, 1.470 Recoil Lug, .700 Bolt, 4340 CM, .750 Bolt Add $100

LONG ACTION (Model 700™ LA Length) – $1140 MSRP

416R SS, 1.350 OD, 1.470 Recoil Lug, .700 Bolt, 4340 CM, .750 Bolt Add $100

XL ACTION – $1240 MSRP

.750 Bolt Only, 416R SS, 1.350 OD, 1.470 Recoil Lug, 4340 CM

Receiver Body

Single Shot or Repeater Style Magazine Cut

One-Piece Bolt

Plunger Ejector (Optional)

Mini 16 Extractor

Bolt Knob

Firing Pin / Spring

Cocking Piece

Bolt Shroud

The Defiance Guarantee

If you don’t like it, we’ll change it, swap it, or refund your money. We want all of our customers to be satisfied.

We’ll even pay the return shipping.

Guaranteed.