If you own a STEYR® AUG® A3 M1, you already know it’s one of the most iconic bullpup rifles ever designed. Reliable, compact, and battle-proven, the AUG platform has earned a legendary reputation. However, even legendary rifles can benefit from thoughtful upgrades. One of the most overlooked improvements you can make is upgrading the factory safety selector—and that’s where the SBF Safety Selector from our team at Heresy Design™ comes in.

Often described by shooters as a “should’ve been factory” part, this upgraded selector enhances ergonomics, durability, and handling without altering the rifle’s original geometry. We’ll break down everything you need to know about the SBF Safety Selector for STEYR® AUG®, including features, performance, installation, compatibility, and whether it’s worth adding to your rifle.

Overview: What Is the SBF Safety Selector?

The SBF Safety Selector (SKU: HD-SS) is an aftermarket replacement safety designed specifically for the STEYR® AUG® A3 M1 platform, an absolutely legendary rifle, including both Standard and NATO stocks. It retains the exact dimensions of the factory selector but improves the design with smoother contours, enhanced texturing, and stronger materials.

Instead of radically changing the control layout, Heresy Design focused on refining what already works—eliminating the sharp edges and discomfort commonly associated with the stock selector.

Key Features at a Glance

• Tapered edges for improved ergonomics

• Compatible with A3 M1 Standard and NATO stocks

• Clearly marked Fire/Safe indicators

• Durable 6061 aluminum construction

• MilSpec Type II anodized finish

• Textured ends for positive engagement

• Limited lifetime warranty

Specs:

• Length: 1.86″

• Weight: 0.2 oz.

• Material: 6061 aluminum

Build Quality and Materials

One of the most noticeable improvements over the factory safety is the material. The OEM selector is functional, but the 6061 aluminum construction of the SBF selector adds a substantial durability upgrade to your build. Aluminum offers several advantages:

• Higher resistance to wear

• Better structural integrity

• Increased longevity under heavy use

• Improved tactile feel

The MilSpec Type II anodized finish further enhances corrosion resistance and scratch protection. This makes it ideal for shooters who train hard, run drills frequently, or operate in harsh outdoor conditions.

Despite the stronger construction, the selector weighs just 0.2 ounces, meaning it adds virtually no weight to your rifle.

Ergonomics: Where This Safety Selector Upgrade Shines

The standout feature of the SBF Safety Selector is its tapered edge design. Factory AUG safeties are known for having relatively sharp edges that can:

• Catch on gloves or gear

• Scratch fingers during manipulation

• Cause discomfort during extended shooting sessions

Heresy Design solved this problem with their upgraded safety selector by rounding and tapering the edges while preserving the original dimensions. The result is a selector that feels smoother and more natural to operate.

The textured ends also provide better tactile feedback, which is especially useful when:

• Wearing gloves

• Operating in wet conditions

• Running drills under stress

This combination of smooth edges and improved texture makes a noticeable difference in real-world handling.

How to Installation the SBF Safety Selector

Another reason the SBF Safety Selector is so popular among AUG owners is its simple installation. Because it maintains factory dimensions, it installs just like the original component with no modifications required.

Most users can complete the installation in minutes using basic tools. There’s no need for gunsmithing, filing, or fitting. This makes it an excellent upgrade for both beginners and experienced rifle enthusiasts.

Compatibility

The selector is designed specifically for:

• STEYR® AUG® A3 M1 Standard stock

• STEYR® AUG® A3 M1 NATO stock

It will not fit earlier AUG variants or non-A3 M1 models, so verifying your rifle’s configuration before purchase is essential.

For current A3 M1 owners, however, fitment is precise and reliable.

Performance on the Range

During live fire testing and manipulation drills, the improvements become immediately obvious on the range.

Smoother Engagement

The tapered edges allow your finger to slide naturally into position when disengaging the safety. There’s no snagging or awkward pressure points.

Faster Manipulation

The textured ends provide a more positive interface, allowing for quicker transitions from Safe to Fire—especially during rapid drills or competition shooting.

Improved Comfort

After extended shooting sessions, many users report noticeably less finger fatigue or irritation compared to the factory selector.

While the upgrade doesn’t directly affect accuracy or recoil, it does enhance control confidence, which can translate into better overall shooting performance, and keeping you on target.

Durability and Long-Term Reliability

Because the selector is CNC-machined from aluminum rather than molded or stamped, it holds up exceptionally well over time. The anodized finish resists:

• Scratches

• Corrosion

• Finish wear

• Environmental exposure

Combined with the limited lifetime warranty, this indicates strong manufacturer confidence in the product’s longevity.

For shooters who train frequently or rely on their AUG for professional use, durability upgrades like this are worth serious consideration.

Who Should Buy the SBF Safety Selector?

This upgrade is ideal for:

Tactical shooters
Those who train regularly will appreciate faster, smoother manipulation.

Competitive shooters
Every fraction of a second matters in competition. Improved ergonomics can make a real difference.

Duty or defensive rifle owners
Reliability and ease of operation under stress are critical. Enhanced controls help reduce user error.

AUG enthusiasts
If you’re committed to optimizing your AUG platform, this is one of the simplest yet most effective upgrades available.

Pros and Cons

Pros

• Noticeably improved ergonomics

• Eliminates sharp factory edges

• Durable aluminum construction

• Lightweight design

• Easy installation

• Compatible with standard and NATO stocks

• Lifetime warranty

Cons

• Only fits A3 M1 models

• Doesn’t change selector size (some users may prefer an extended version)

SBF Safety Selector Final Verdict: Should You Upgrade?

The SBF Safety Selector for STEYR® AUG® is one of those rare aftermarket parts that genuinely feels like it should have been included from the factory. Instead of reinventing the control, Heresy Design refined it—fixing small but meaningful issues that owners of the AUG rifle have noticed for years.

It’s affordable, easy to install, and immediately improves handling comfort and manipulation speed. While it’s not a flashy upgrade, it’s a highly practical one that enhances your interaction with the rifle every time you use it.

Final Rating: 9.5/10

If you own an AUG A3 M1 and want a simple upgrade that improves ergonomics, durability, and usability, the SBF Safety Selector is absolutely worth adding to your setup.

Check out Heresy Design on Instagram!