Geissele Super Semi-Automatic Enhanced SSA-E Trigger - AR-15
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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 SSA-E is an enhanced 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 trigger refined for precision — the SSA-E lightens the break for shooters who split hairs at distance.
The Geissele Super Semi-Automatic Enhanced (SSA-E, 05-160) takes the SSA architecture and reworks the geometry for a lighter, cleaner second stage — a break Geissele's own shooters describe as a glass rod snapping. The result is a two-stage trigger that keeps the SSA's safety margin while rewarding deliberate precision work: target rifles, long-range builds and any AR-15 asked to hit small things a long way off.
Like every Geissele, the SSA-E is machined and finished to tolerances that keep the pull consistent for the life of the rifle, ships non-adjustable with nothing to drift, and runs full-power springs for dependable ignition.
Drop-in fit for AR-15/M4 pattern lower receivers with Mil-Spec .154 in trigger and hammer pins. That includes UK straight-pull AR-15 builds, and the SSA-E is one of the more sensible choices for one: a straight pull is shot deliberately and at distance, which is exactly what the lighter enhanced second stage is for. Large-pin receivers are not compatible — confirm your pin size before ordering. Installation is armourer-level work; complete function and safety checks before live fire.
| Platform | AR-15 / M4 |
|---|---|
| Fits | Mil-Spec lower receivers with .154 in trigger and hammer pins |
| Type | Two-stage enhanced trigger |
| Made in | USA |
| Brand | Geissele Automatics |
| MPN | 05-160 |
Precision that keeps its nerve. Order the SSA-E 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 enhanced trigger |
| Made in | USA |
| Brand | Geissele Automatics |
| MPN | 05-160 |
| Category | Trigger |
| Shipping weight | 0.2 kg |
| Barcode | 854014005038 |
£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 two-stage for AR-15/M4 pattern lowers using mil-spec trigger pins. Non-standard or large-pin receivers will not accept it, so confirm your pin size before you order. If the lower is an unfamiliar brand, get in touch with the details and we'll check for you.
The SSA-E is the lightened, refined version of the SSA: the break is light and exceptionally crisp, aimed at precision and marksmanship rather than hard-use duty work. You still get a distinct two-stage feel, with a take-up stage before a defined wall. It is one of the most popular choices for a DMR or accuracy-focused AR build.
Go for the <a href="/products/geissele-ssa-trigger-ar-15">SSA</a> if the rifle is a working carbine and you want the heavier, more forgiving pull; go for the SSA-E if you want the lighter, crisper break for deliberate shooting. Both share the same two-stage architecture and curved-style bow. Neither is adjustable, so the weight you buy is the weight you get.
No, it uses your existing standard trigger and hammer pins provided they are serviceable, and there are no shims or springs to fit. Function-check the rifle thoroughly after installation, including safety operation, before live firing. If you would like background on two-stage triggers first, see our <a href="/blogs/buying-guides/ar-15-trigger-guide">AR-15 trigger guide</a>.
We dispatch from the United Kingdom with £5 tracked UK delivery in 7–10 business days and email you tracking at despatch. If the trigger turns out to be the wrong fit for your rifle, 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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