Micro Threaded Comp - Circle | Strike Industries

The Strike Industries Strike Micro Threaded Comp – CIRCLE is an ultra-compact pistol compensator developed for compatible firearms chambered in 9mm and .357 SIG.

Part of the Strike Micro Threaded Comp (SMTC) series, the CIRCLE combines a minimalist design, lightweight steel construction and a gas-redirection system intended to reduce felt recoil and muzzle rise.

Originally developed for smaller pistol platforms, its compact dimensions also allow compatibility with a variety of full-size configurations, subject to barrel and recoil-system compatibility.

Ultra-Compact Minimalist Design

The Strike Micro Threaded Comp – CIRCLE features a streamlined design intended to minimise the overall dimensions of the muzzle-mounted component.

With an overall length of just 16.3 mm, the compensator maintains a compact profile while incorporating a gas-redirection design.

Originally developed for micro, subcompact and compact pistols, the CIRCLE can also be used with compatible full-size platforms.

Its minimalist appearance complements a wide range of factory and aftermarket slide profiles.

The compact design is also intended to maintain compatibility with many existing pistol holsters, although individual holster fitment may vary.

Gas-Redirection Construction

The CIRCLE incorporates a gas-redirection design intended to help reduce felt recoil and muzzle rise during firing.

Its internal geometry redirects propellant gases as they leave the muzzle.

According to Strike Industries, internal testing has shown average felt-recoil reductions of approximately 8–15%, depending on the firearm configuration and application.

These figures represent manufacturer testing and should not be interpreted as guaranteed performance results for every compatible firearm.

Threaded Barrel Compatibility

The Strike Micro Threaded Comp – CIRCLE is designed for compatible pistol barrels featuring 1/2"-28 threads.

The manufacturer specifies compatibility with the following calibres:

• 9mm

• .357 SIG

The compensator is intended for use with a variety of pistol slide sizes, from micro and subcompact configurations to compatible full-size platforms.

Actual compatibility depends on the firearm's barrel and recoil-system configuration.

O-Ring Retention System

The CIRCLE uses an O-ring-based retention arrangement.

The supplied O-rings form part of the manufacturer's intended attachment system for compatible threaded barrels.

Strike Industries specifies an important limitation: the O-ring retention arrangement is not suitable for threaded barrels without a shoulder.

Such configurations require separate fitment considerations and professional assessment.

All installation and compatibility checks should be performed by a certified gunsmith in accordance with the manufacturer's requirements.

Holster Compatibility

The compact external profile of the CIRCLE was designed with existing pistol holsters in mind.

Its short overall length and rounded shape help minimise changes to the external dimensions of the firearm.

Strike Industries developed the design to accommodate many conventional holster configurations without requiring a larger compensator profile.

However, compatibility cannot be guaranteed with every holster, and actual clearance depends on the specific firearm and holster combination.

Durable AISI 1144 Steel Construction

The Strike Micro Threaded Comp – CIRCLE is manufactured from AISI 1144 steel.

This steel provides the mechanical properties required for the component's compact construction.

The compensator features a bead-blasted surface preparation followed by a Quench Polish Quench (QPQ) finishing process.

The QPQ treatment creates a durable surface intended to improve wear resistance and provide additional protection to the steel component.

The combination of steel construction and protective surface treatment supports the product's intended service life.

Exceptionally Lightweight Construction

The CIRCLE is designed to provide a compact compensator configuration with minimal additional weight.

Weighing approximately 9.9 grams, it is significantly smaller and lighter than many conventional full-size muzzle-device designs.

Its compact external dimensions make it suitable for pistol configurations where overall size and weight are important considerations.

Dimensions:

• Length: 16.30 mm

• Width: 16.40 mm

• Height: 16.50 mm

• Weight: approximately 9.9 g (0.35 oz)

Package Contents

The manufacturer's package includes:

• 1 × Strike Micro Threaded Comp – CIRCLE

• 3 × O-rings

The supplied components correspond to the manufacturer's standard product configuration.

Important Compatibility Considerations

Strike Industries specifies that the CIRCLE is designed for compatible 1/2"-28 threaded barrels in the listed calibres.

However, compatibility depends on more than barrel threading alone.

The manufacturer warns that the included O-ring retention arrangement is unsuitable for threaded barrels without a shoulder.

Strike Industries also notes that recoil-spring tuning may be necessary because the compensator can affect slide energy.

Installation, fitment verification and functional testing must be performed by a certified professional gunsmith.

Key Features:

• Ultra-compact pistol compensator design

• Minimalist rounded profile

• Developed for compatible micro, subcompact, compact and full-size pistols

• 1/2"-28 threaded barrel compatibility

• Intended for 9mm and .357 SIG

• Gas-redirection design

• Manufacturer-reported reduction in felt recoil

• Designed to reduce muzzle rise

• O-ring retention arrangement

• Three O-rings included

• Compact profile intended for compatibility with many existing holsters

• AISI 1144 steel construction

• Bead-blasted surface preparation

• Quench Polish Quench (QPQ) surface treatment

• Lightweight construction

• Length: 16.30 mm

• Width: 16.40 mm

• Height: 16.50 mm

• Weight: approximately 9.9 g

Technical Specifications:

• Manufacturer: Strike Industries

• Product: Strike Micro Threaded Comp – CIRCLE

• Manufacturer Part Number: SI-MC-CIRCLE

• Product Type: Pistol compensator

• Compatible Calibres: 9mm / .357 SIG

• Barrel Thread: 1/2"-28

• Material: AISI 1144 steel

• Surface Treatment: Bead-blasted, QPQ finish

• Retention System: O-ring arrangement

• Length: 16.30 mm

• Width: 16.40 mm

• Height: 16.50 mm

• Weight: Approximately 9.9 g

The Strike Industries Strike Micro Threaded Comp – CIRCLE combines an ultra-compact profile, durable steel construction and a minimalist gas-redirection design within the manufacturer's SMTC product family.

Its lightweight construction, O-ring retention arrangement and compatibility with selected threaded-barrel pistol configurations distinguish it from larger compensator designs.

Important Product Notes

There are three details worth keeping clear in the product listing:

1. O-ring compatibility: The included retention system is unsuitable for threaded barrels without a shoulder.

2. Recoil-system considerations: Strike Industries states that recoil-spring tuning may be necessary.

3. Installation: The manufacturer requires fitting and functional verification by a certified professional gunsmith.