Surefire X300-B Adapter (Antimatter Wing options available)

I’ve personally used this adapter for over two years on my HK P30SK, and it’s performed flawlessly through range sessions and daily carry. This custom 3D printed adapter allows the Surefire X300-B weapon light to securely mount on pistols with less than 3 Picatinny rail slots, expanding compatibility for compact and non-standard frames. It also supports the Antimatter Industries Wing, giving users a streamlined setup for both recoil control and weapon illumination.

The design includes an integrated dust cover and rail support block, which not only prevents debris from entering the frame but also provides critical reinforcement. This protects the pistol’s rail from deformation caused by the X300-B’s tightening screw—a common issue on polymer-framed or shorter-railed pistols.

Key Features:

• 3D Printed Adapter

  Custom designed and manufactured in-house using high-quality material for strength and durability.

• Secure Fit for Surefire X300-B

  Enables proper fitment on pistols with short rails or fewer than 3 slots, with no wobble or misalignment.

• Supports Antimatter Industries Wing

  Fully compatible with the Antimatter Wing system for enhanced recoil control.

• Built-In Dust Cover / Rail Support

  Blocks dust and debris from entering the frame while distributing the clamping force of the weapon light, preventing frame deformation.

• Non-Permanent Install

  Mounts easily and can be removed without modifying your firearm or light.

What’s Included:

• One 3D printed adapter for Surefire X300-B

• Integrated dust cover / frame support

Please Note:

• Compatible with Surefire X300-B only; not designed for the X300-A.

• Also compatible with the Antimatter Industries Wing, sold separately.

• Not affiliated with or endorsed by Surefire or Antimatter Industries.

• Firearm, light, and Wing not included.

• Always verify safe fitment and function before live use.

• Minor surface variations may exist due to the nature of 3D printing.