Description

The Sentry – On Duty. On Point.

by Heretic Custom Arms

Built for precision. Engineered for reliability. Ready when it matters.

Duty-ready performance with premium ergonomics and uncompromising durability

The Sentry lineup from Heretic Custom Arms is built around a simple principle: uncompromising reliability paired with refined, duty-ready performance. Designed for shooters who demand consistency under pressure, the Sentry series delivers a balanced blend of precision, control, and rugged durability.

Chambered in 5.56mm (Optional: 6mm ARC, 6.5 Grendel) and built around a 16″ barrel (18″ and 20″ optional), this carbine offers optimal velocity and accuracy while maintaining maneuverability for a wide range of applications—from training and range work to defensive roles. Whether you’re running drills or zeroing at distance, the Sentry maintains consistent shot placement and smooth operation. The platform is engineered to provide smooth cycling and dependable performance across varying conditions and ammunition types.

Ergonomics are dialed in with proven components, featuring a B5 Systems grip for enhanced control and comfort, paired with the B5 Systems Bravo stock. This combination provides a stable, repeatable cheek weld and a solid shoulder interface, allowing for improved handling and shot consistency without unnecessary bulk.

Finished receivers and handguards in the following Cerakote colors (Graphite Black, FDE, OD Green, or Sniper Grey), the Sentry carbine presents a clean, low-profile aesthetic while adding an extra layer of durability and corrosion resistance—built to perform in demanding environments.. Every detail reflects a commitment to quality craftsmanship and functional design.

The Sentry isn’t just another rifle—it’s a purpose-built platform for those who stand ready.

Specifications

• Platform: AR-15
• Caliber: 5.56 NATO (Optional: 6mm ARC, 6.5 Grendel)
• Barrel Length: 16 inches Match Grade with Sub-MOA Guarantee (18″ and 20″ optional)
• Handguard: 15″ MLOK® Free Float Handguard
• Grip: B5 Systems P23
• Stock: B5 Systems Bravo
• Finish: Cerakote
• Muzzle Device: MIL-SPEC A2 Compensator
• Trigger: MIL-SPEC Single Stage
• Bolt Carrier Group: Carpenter 518 Steel with Black Nitride Finish
• Weight: 16″: 6.4 lb, 18″: 6.7 lb, 20″: 7.0 lb
• Includes:
  • (1) Lancer  L5AWM®GEN 2 223/5.56 (Capacity in Compliance with State Laws)
    • Amend2® AR-15 Mod-2 6mm ARC/6.5 Grendel 10rd (Standard on 6mm Cartridges)
  • (1) Pair of Low-profile M-LOK® Rail Covers Designed to Provide a Sure Grip and Heat Resistance on the Handguard
  • Savior Equipment Specialist Single Soft Rifle Case

Why Choose the Sentry Lineup?

The Sentry series is designed with a focus on reliability under pressure. Every component is selected to deliver consistent performance without unnecessary complexity—making it a dependable choice for shooters of all experiences.