AR-15 Safety Selector Detent by Tihon (selector plunger)

AR-15 safety detent is a precision selector detent that locks the lever in Safe/Semi, delivers crisp indexing and predictable tactile feedback, and keeps your fire control reliable under hard use. Precision-machined from brass.

Key benefits

• Crisp selector indexing — positive clicks without mush.
• MIL-SPEC fit — compatible with most AR-15 lowers and many AR-10 lowers built to AR-15 selector geometry.
• Corrosion resistant — non-ferrous brass won’t rust; smooth, low-friction interface.
• Easy drop-in install — no special tools required.

Purpose

The detent retains the safety lever in the selected position, prevents unintended movement and stabilizes FCG operation during sustained fire.

Compatibility

• Platforms: AR-15, AR-10 lowers following AR-15 selector interface.
• Selectors: standard and ambidextrous.
• Grips: A2/aftermarket grips with a detent-spring channel.

Materials & finish

• Material: brass (precision machined).
• Finish: as-machined/polished brass (will naturally patinate over time).
• Tolerances: MIL-SPEC geometry for consistent seating.

Installation

1. Insert the detent into the selector bore in the lower receiver.
2. Place the detent spring into the pistol-grip channel and secure the grip.
3. Do not overtighten the grip screw to avoid binding the selector movement.

Specifications

• Product type: Safety Selector Detent.
• Function: positive locking of the Safe/Semi lever.
• Install: drop-in, no modification.

FAQ

Why is my selector mushy or overshooting clicks

Likely causes are a worn detent or incorrect grip-screw length compressing the spring. Replace the detent and verify spring length/tension.

Do I need lubrication

A light coat of gun oil during routine maintenance is sufficient.