Geissele Super Dynamic Combat SD-C Trigger - AR-15 Flat Bow
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 Dynamic Combat (SD-C) is a flat-bow two-stage trigger for AR-15 and M4 pattern rifles, fitting Mil-Spec lower receivers that use .154 in trigger and hammer pins.
The SSA's two-stage pull behind a flat bow — the SD-C changes how the trigger meets your finger, not how it breaks.
The Geissele Super Dynamic Combat (SD-C, 05-165) pairs the proven SSA two-stage pull with Geissele's flat trigger bow. The flat shoe gives a consistent finger position and a mechanical advantage that makes the pull feel lighter and more controlled, while the distinct 90-degree break point sharpens your sense of exactly when the shot will fire.
Underneath, it is all SSA: smooth first-stage take-up, crisp second stage, full-power ignition springs and the safety margin that has made Geissele two-stages a common choice for hard-use rifles. If you have never run a flat bow, the SD-C is a straightforward introduction.
Drop-in fit for AR-15/M4 pattern lower receivers with Mil-Spec .154 in trigger and hammer pins, including UK straight-pull AR-15 builds — the heavier, more forgiving two-stage weight suits a rifle used in gloves, in the cold and in the wet. Large-pin receivers are not compatible, so confirm your pin size before ordering. Installation is armourer-level work; run full function and safety checks after fitting.
| Platform | AR-15 / M4 |
|---|---|
| Fits | Mil-Spec lower receivers with .154 in trigger and hammer pins |
| Type | Two-stage combat trigger, flat bow |
| Made in | USA |
| Brand | Geissele Automatics |
| MPN | 05-165 |
The two-stage pull, flat-bow edition. Order the SD-C 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 | Two-stage combat trigger, flat bow |
| Made in | USA |
| Brand | Geissele Automatics |
| MPN | 05-165 |
| Category | Trigger |
| Shipping weight | 0.2 kg |
| Barcode | 854014005069 |
£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 trigger for AR-15/M4 pattern lowers with mil-spec trigger pins. Large-pin receivers are not compatible, so check your pin holes before ordering. If you are unsure, measure them or <a href="/pages/contact">contact us</a> with the receiver make and model.
The C stands for combat: it is the two-stage Super Dynamic set up for duty and general-purpose use, with a deliberate first stage and a defined wall rather than the lightest possible break. That makes it forgiving under stress and when wearing gloves. It still gives you the flat bow and the clean second stage that the Super Dynamic line is known for.
A flat shoe keeps the finger at a fixed distance from the pivot no matter where it contacts, so the perceived pull weight stays consistent. Shooters with larger hands or a lower finger placement often prefer it. If you want a lighter feel from the same flat-bow layout, the <a href="/products/geissele-sd-e-super-dynamic-enhanced-trigger">SD-E</a> is the enhanced version of the same idea.
It installs with standard trigger and hammer pins, so no additional hardware is required if yours are in good order. There is one configuration, so there is no variant to choose between. Our <a href="/collections/geissele-automatics">Geissele Automatics</a> collection shows how the SD-C sits between the entry-level and fully adjustable models.
This trigger ships from the United Kingdom with £5 tracked UK delivery in 7–10 business days, and tracking is emailed once it is on its way. If it 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.
Why Onyx Armaments
