Binary Safety Selector

About this product

The Binary Safety Selector is a precision-machined 90-degree fire control component designed for binary and forced-reset trigger systems. It provides tactile differentiation between binary, safe, and fire positions through deliberately engineered detent depths. As Marcus Corbin, with 12 years specializing in precision fire control systems, I developed this selector to address the specific demands of high-cycle FRT applications where standard selectors fail to provide consistent engagement.

What is the Binary Safety Selector used for?

The Binary Safety Selector provides reliable mode switching for forced-reset and binary trigger systems. It's engineered specifically for the rapid cycling demands of FRT-15 triggers where standard selectors can develop inconsistent engagement. The 0.080-inch binary detent depth gives positive tactile feedback during high-speed manipulation. This prevents accidental mode switching during sustained firing sequences exceeding 500 rounds per minute.

How does the Binary Safety Selector compare to the Franklin Armory BFSIII selector?

Our selector maintains tighter dimensional tolerances than the Franklin Armory BFSIII selector, with shaft diameter held to 0.248 inches versus Franklin's 0.250-inch nominal specification. This eliminates the rotational play that plagues many aftermarket selectors in mil-spec receivers. Where Franklin's design prioritizes compatibility across multiple platforms, ours is optimized specifically for FRT systems, with a shallower binary detent that provides faster, more positive engagement. For dedicated FRT builds, our selector provides superior consistency, but the Franklin unit offers broader compatibility with conventional binary triggers.

What does it weigh and what are the dimensions?

The selector weighs 2.1 ounces (59.5 grams) with complete dimensions of 0.750-inch lever length, 0.248-inch shaft diameter, and overall rotation of exactly 90 degrees. The 4140 steel construction contributes to this weight, providing the mass necessary for consistent detent engagement across thousands of cycles. The lever profile is specifically contoured to clear most aftermarket grips while maintaining positive glove purchase.

Who is this NOT for?

This selector is not suitable for shooters using standard semi-automatic triggers or those who prioritize universal compatibility over specialized performance. The shallow 0.080-inch binary detent requires deliberate manipulation that may feel overly stiff in non-binary applications. If you're building a general-purpose AR-15 without forced-reset or binary capability, our standard safety selector or the Anti-Walk Trigger Pin Set would be more appropriate investments.

What's in the box?

The package contains one Binary Safety Selector, precisely machined and heat-treated to 40-42 HRC hardness. No additional components are included, as experienced builders typically source their own detents and springs. The selector arrives degreased and ready for immediate installation, with packaging that prevents surface marring during shipping. Installation typically requires 3-5 minutes with basic armorer's tools.

Is the Binary Safety Selector worth it at $39.99?

At $39.99, this selector delivers exceptional value for builders requiring reliable binary/FRT functionality. The precision machining and heat treatment represent a significant upgrade over $15-25 commercial selectors that lack the specific detent engineering for forced-reset systems. When paired with our FRT-15 Drop-In Trigger Module, it creates a complete fire control system capable of sustaining rates exceeding 900 rounds per minute without degradation. For the serious FRT enthusiast, the reliability improvement justifies the premium over generic alternatives.