The Ballistic Engineering AR Core Atrius-Compatible Trigger (Ballistic Engineering part no. ARCORESTATR) is a straight-shoe single-stage AR-15 trigger built to fit Atrius-pattern lower receivers. Built by Ballistic Engineering, this version of the Core line uses the same lightweight, no-adjustment design as the standard Core trigger, machined to the fitment needed for Atrius-pattern components. The straight shoe favors consistent finger placement across the blade. It is a purpose-built option for owners running an Atrius-compatible lower who still want a straightforward Core-line trigger.

Key Specifications

• Machined to fit Atrius-pattern AR-15 lower receivers.
• Single-stage trigger design in the same family as Ballistic Engineering’s standard Core trigger.
• Features a straight trigger shoe for consistent finger placement.
• Fixed pull weight rather than an adjustable range, keeping the design simple.
• A no-fitting, purpose-built option for owners running an Atrius-compatible lower.

Frequently Asked Questions

What lower receivers is this trigger compatible with? It is machined specifically to fit Atrius-pattern AR-15 lower receivers.

Is this a curved or straight trigger shoe? This version uses a straight trigger shoe.

Buy the Ballistic Engineering AR Core Atrius-Compatible Straight AR-15 Trigger

Get a Core-line trigger built to fit your Atrius-pattern lower. Order it from our Lubbock, Texas gun shop for fast, insured shipping, and see our full AR-15 trigger lineup for more Ballistic Engineering options.