Description
This Drop in Auto Sear (DIAS) is a direct replacement component for builders seeking a reliable, drop-in solution for their platform. It’s designed for the experienced builder who values straightforward installation and consistent performance. Since adding it to our catalog in early 2026, this unit has proven to be a reliable performer with consistently positive feedback from our customers.
What Makes It Stand Out
- Direct Drop-In Fit: Engineered for minimal fitting, designed to seat correctly in a properly milled lower receiver.
- Durable Coating: The finish is more resilient than it appears. Our staff noted it held up through three aggressive cleaning cycles with Hoppes No. 9 solvent without degradation.
- Precision Machining: CNC-machined from solid steel for dimensional accuracy and reliable engagement with the disconnector.
- Consistent Performance: Built to provide a predictable reset and engagement cycle for sustained function.
- No-Fuss Design: A straightforward component that does its job without unnecessary complexity.
Tech Specs
| Type | Drop in Auto Sear (DIAS) |
| Material | Steel |
| Finish | Black Oxide / Phosphate |
| Weight (measured) | 3.5 oz |
| Compatibility | Designed for AR-15/M16 platform fire control groups |
| Installation | Drop-in (requires properly milled lower receiver) |
| Packaging | Anti-corrosion bag |
Common Questions
Is this a complete assembly or just the sear?
This is the Drop in Auto Sear component itself. It is not a full fire control group kit.
Does this require any fitting?
It is designed as a drop-in part for a correctly machined lower receiver. Minor fitting may be required depending on your specific receiver’s tolerances.
What is the finish and how durable is it?
It has a black oxide/phosphate finish. In our handling, the coating has shown good resistance to common gun cleaning solvents, maintaining integrity through multiple cleanings.
✅ Plain, unmarked packaging
✅ Easy 30-day return policy
✅ 256-bit encrypted checkout
✅ USA-based seller
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