Kabuto Steel Housing 3 Position FRT Universal

Materials: Trip and Housing Made of Reinforced Steel

Description:

Drop-in FRT with an ambidextrous Safety Selector

This FRT is a performance-oriented trigger system designed to significantly increase firing speed by mechanically forcing the trigger forward after each shot, allowing for faster follow-up shots while maintaining a semi-automatic function per trigger pull.

It’s built with durable materials like hardened steel and reinforced housings, focusing on reliability, consistent reset timing, and smoother cycling. The design aims to balance speed, control, and durability, making it appealing for users who want quicker trigger response without sacrificing stability or feel while keeping the standard safety selector. 

TROUBLE SHOOTING: 

AR-15 FRT Troubleshooting Guide

Bursts or Inconsistent FRT Function

Symptoms:

• Works normally in semi-auto
• Inconsistent or bursts during rapid fire

Cause:

Bolt speed and timing issues.

Fixes:

• Use heavier buffer (H2, H3, or heavier)
• Add buffer spacer to reduce over-travel
• Reduce gas if using adjustable gas block
• Lubricate BCG rails, cam pin, and trigger surfaces
• Use quality magazines
• Allow brief break-in period

⸻

Trigger Locked in FRT Mode

Symptoms:

• Works in semi-auto
• Trigger unresponsive in FRT mode

Cause:

BCG compatibility or mechanical clearance.

Fixes:

• Use full-auto profile bolt carrier group
• Verify trigger and cam clear properly
• Ensure selector fully engages each position
• Use factory selector spring and detent
• Confirm reset lever moves freely

⸻

Charging Handle Stiff or Bolt Binding

Symptoms:

• Rough charging handle
• Bolt does not cycle smoothly

Cause:

Clearance interference or tight tolerances.

Fixes:

• Lightly tune reset lever only if contact exists
• Confirm BCG cycles freely
• Inspect upper receiver for interference
• Lubricate all contact surfaces

⸻

Loose or Inconsistent Selector

Symptoms:

• Selector feels loose or lacks positive click

Cause:

Weak spring tension or worn components.

Fixes:

• Verify proper detent and spring installation
• Do not modify selector spring
• Replace worn selector or detent

⸻

Light Strikes or Failure to Fire

Symptoms:

• Hammer drops but round does not fire
• Weak primer strikes

Cause:

Bolt timing, bolt bounce, or hammer spring issues.

Fixes:

• Ensure full bolt lock-up
• Use heavier buffer or spacer
• Verify hammer spring orientation
• Use quality, full-power ammunition