Geissele Super 3-Gun S3G Trigger - AR-15 Single-Stage
Mix and match across the range: 2 items save 5%, 3 save 10%, 4 or more save 15% on your whole basket.
Drop-in fit for AR-15/M4 pattern lower receivers with mil-spec trigger pins. Confirm pin size before ordering.
Not sure it fits your rifle? Ask us before you order
The Geissele Super 3-Gun (S3G) is a hybrid single-stage competition trigger for AR-15 and M4 pattern rifles, fitting Mil-Spec lower receivers that use .154 in trigger and hammer pins.
The single-stage that made 3-Gun shooters switch — Geissele's S3G is speed engineered, not just lightened.
The Geissele Super 3-Gun (S3G, 05-152) is a hybrid single-stage competition trigger: a short, smooth rolling break with almost no perceptible take-up, paired with a reset so short and positive that fast pairs feel like one motion. Geissele designed it for the demands of 3-Gun — close-range work and precise singles at distance — and the pull handles both without changing character.
Because it is a Geissele, the speed comes from geometry and machining rather than weakened springs: ignition stays full-power reliable and the internals hold their feel across seasons of competition. A curved bow keeps the traditional feel for shooters who prefer it.
Drop-in fit for AR-15/M4 pattern lower receivers with Mil-Spec .154 in trigger and hammer pins, which includes UK straight-pull AR-15 lowers. On a straight pull it is the short, light break rather than the fast reset that does the work, so weigh that against Geissele's two-stage models before ordering. Large-pin receivers are not compatible — confirm your pin size first. Fit at the bench and run full function and safety checks before live fire.
| Platform | AR-15 / M4 |
|---|---|
| Fits | Mil-Spec lower receivers with .154 in trigger and hammer pins |
| Type | Single-stage hybrid competition trigger, curved bow |
| Made in | USA |
| Brand | Geissele Automatics |
| MPN | 05-152 |
Speed you can trust. Order the S3G today — imported from the USA with all duties paid by us and dispatched tracked from the UK in 7–10 business days, with nothing to pay on delivery.
Explore more: all Rifle Triggers, AR-15 Parts & Accessories or browse all Geissele Automatics.
| Platform | AR-15 / M4 |
|---|---|
| Fits | Mil-Spec lower receivers with .154 in trigger and hammer pins |
| Type | Single-stage hybrid competition trigger, curved bow |
| Made in | USA |
| Brand | Geissele Automatics |
| MPN | 05-152 |
| Category | Trigger |
| Shipping weight | 0.2 kg |
| Barcode | 854014005052 |
£5 tracked UK delivery on every order via Royal Mail Tracked 24. Our products are ordered in from the manufacturer rather than held in UK stock, so please allow 7 to 10 business days (Monday to Friday, excluding bank holidays) from the date of your order for it to reach you. Tracking details are emailed on dispatch. UK delivery only.
You have 30 days from receiving your order to cancel it for any reason, then 14 days to send it back unused and in its original packaging. Faulty, damaged or incorrect items are replaced or refunded and we cover reasonable return postage. Refunds go back to your original payment method within 14 days of receiving the return.
It is a drop-in unit for AR-15/M4 pattern lower receivers with mil-spec trigger pins. Check your pin diameter before ordering, since large-pin lowers require a different trigger. If you cannot tell, measure the pin holes or ask us with the receiver details.
The S3G is a single-stage hybrid competition trigger, so there is no take-up stage to manage: the shot breaks in one motion. Its defining feature is a very short, fast reset, which is what competitors want when driving between targets. That same lack of take-up makes it less suited to a general-purpose or duty rifle.
Both are aimed at 3-gun, but the <a href="/products/geissele-sd-3g-super-dynamic-3-gun-trigger">SD-3G</a> brings the Super Dynamic flat bow to competition use, while the S3G is the single-stage hybrid with the very quick reset. If you prefer everything happening in one press, the S3G is the one; if you like a flat shoe and a hint of stage, look at the SD-3G.
It is supplied in a single configuration, so there is no shoe or finish choice, and it fits with your existing standard pins. Anti-walk pins are optional. You can compare it against the rest of our <a href="/collections/ar-15-triggers">AR-15 triggers</a> if you want to see the alternatives side by side.
Orders leave the United Kingdom with £5 tracked UK delivery in 7–10 business days, and tracking arrives by email when the parcel ships. If the trigger does not fit your lower, see our returns policy or <a href="/pages/contact">contact us</a> and we'll help sort it.
7 to 10 business days from the date of your order. Every order is sent Royal Mail Tracked for a flat £5 and you receive tracking details by email when it is dispatched.
Yes. We list only genuine parts and optics from the brands shown, ordered in from the manufacturer for your order.
Compatibility notes on this page come from the manufacturer. If you are unsure, email us with your make and model before ordering and we will check rather than guess.
Yes. Bundle & Save applies automatically in your basket: 5% off when you buy 2 items, 10% off at 3 items and 15% off at 4 or more. It works across the whole range, so you can mix and match, and there is no code to enter.
Yes — you have 30 days from delivery to cancel for any reason, as long as the item is unused and in its original packaging. See our returns policy for the details.
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