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The Geissele Super 3-Gun trigger, better known as the S3G, is what you reach for when a stage clock is running and you want your rifle to keep up with your finger. Geissele built it as a semi-automatic-only version of their Super Select-Fire combat trigger, the same one they make for U.S. Special Operations. What they carried over is match-grade semi-auto performance paired with the smooth feel of a single-stage, which is exactly what makes it so quick on close targets and fast follow-ups.
What sets this one apart is the hybrid rolling break. It behaves like a cross between a single-stage and a traditional two-stage, so you get a very short, light take-up that rolls right into a clean break and then snaps back with a very short reset. That reset is the real story here, letting you run splits about as fast as you can pull. The curved M4-style trigger bow gives you solid control and a familiar feel under your finger.
The S3G ships with two springs so you can set it up how you like. Run the gold spring for roughly a 4.5 pound pull, or swap in the black spring to bring it down to around 3.5 pounds for a lighter break. Both are non-adjustable beyond the spring choice, so it's a simple setup with no fiddling once it's in.
Installation is the same as any mil-spec trigger group. The S3G uses standard .154 inch trigger and hammer pins, so it fits any mil-spec stripped lower, and it runs in 5.56, .223, and .308 AR-10 pattern rifles alike. Each trigger is EDM wire-cut from tool steel with a durable black finish, so it holds up round after round. Worth noting, it won't fit the older large-pin Colt rifles, and it isn't meant for the MPX or MCX platforms. This is a speed-first competition trigger, so if you're chasing tiny groups off a bench, one of Geissele's precision options is a better match.
The S3G drops into any mil-spec AR-15 or AR-10 lower receiver using standard .154 inch trigger and hammer pins. It works in 5.56, .223, and .308 AR-10 pattern rifles. Keep in mind it won't fit older large-pin Colt rifles, and it isn't compatible with the SIG MPX or MCX platforms.
The trigger isn't adjustable in the traditional sense, but it comes with two springs to set your pull weight. The gold spring gives you roughly a 4.5 pound pull, while swapping to the black spring lightens it to around 3.5 pounds. It's a quick change and no other tuning is needed.
It's a hybrid, which is the whole point of the design. The S3G blends the smooth, short feel of a single-stage with the safety and reliability of a two-stage, giving you a light take-up that rolls straight into a crisp break. That combination is what makes it so fast for close-course competition.
This one is built for speed rather than precision. Geissele designed the S3G for close-course, run-and-gun competition where quick target engagement and fast follow-up shots matter most. If your priority is tight groups off a bench or long-range accuracy, a dedicated precision trigger from Geissele's lineup is a better fit.
| UPC | 854014005052 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | 05-152 |
| Product Type | Trigger |
| Model |
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