Beavertail Expansion for EVO Hellcat Conversion Kit

Already running an MCK EVO and want your Springfield Hellcat in that same chassis? This is the beavertail that makes the lockup work.

The EVO is built as a shared platform across a long list of pistols. The Hellcat’s compact grip, rear tang, and backstrap contour are a different shape, so they need their own interface. This adapter is cut to that geometry so the gun seats flush, stays centered, and locks in the same way every time.

Swap the beavertail on the EVO you already have. Drop the Hellcat in, close the latch, and you are running a compact PDW-style setup. No milling. No fitting. No extra hardware.

Key Features

• Shaped for the Hellcat frame: Follows the grip line, rear tang, and backstrap so the pistol indexes the same way every time you seat it.
• Uses the EVO you already own: You do not buy a second chassis. Change the beavertail and the same EVO now accepts the Springfield Hellcat.
• Repeatable lockup under recoil: The adapter keeps the frame from walking so the gun stays planted through fast strings.
• On and off in seconds: Installs on the existing EVO with the same process as the stock beavertail. Pull it off and the chassis is back to its original setup with no marks left on the pistol.
• Same polymer as the EVO line: High-impact, heat-stable material matched to the rest of the chassis so it holds up to range use, carry, and temperature swings.

Compatibility Note: Built for the Springfield Hellcat (standard and OSP). Confirm fitment for Hellcat Pro before ordering. The base MCK EVO chassis is required and sold separately.

What’s in the Polybag:

• 1 EA – Hellcat Beavertail “U”
• 1 EA – Hellcat Adapter for Accessory Rail (1 Left and 1 Right side)
• 1 EA – 2mm Allen Wrench
• 1 EA – M3 x 14 Flat Head Screw 
• 1 EA – M3 x 22 Flat Head Screw
• 2 EA – M3 Nuts