Last reviewed: 2026-04-18 by Jake Terry, FFL07/SOT3, with hands-on install experience on AR/AK/Glock platforms.
The Geissele SSP Flat Bow Trigger marks Geissele Automatics’ entry into true single-stage trigger design — no creep, no take-up, just a straight pull to a crisp break. Built for AR15 and AR10 platforms, this drop-in assembly features a flat bow face that delivers consistent finger placement shot to shot, a geometry favored by precision shooters who prioritize repeatable trigger press. The short reset provides tactile feedback for rapid follow-up without losing sight picture, making the SSP a solid choice for duty rifles, precision gas guns, and competitive applications where clean break and fast reset both matter.
How It Works
Geissele machines the SSP from S7 tool steel using wire EDM technology, then applies a black oxide finish for corrosion resistance. The flat bow presents a consistent contact surface across the finger pad, reducing the tendency to “roll” the trigger pull — a common issue with curved bows. Break weight sits around 3.5 pounds. The single-stage mechanism means the sear releases immediately after you overcome the spring pressure; there is no creep phase. Reset is short and distinct, allowing you to prep the next shot without overtravel guesswork. The trigger is a drop-in unit for mil-spec AR15 and AR10 lower receivers. Installation requires standard AR armorer tools: punch set, hammer, and a function-check protocol before live fire.
Technical Breakdown
| Spec | Value |
|---|---|
| Type | Single-stage |
| Platform | AR15, AR10 (mil-spec) |
| Pull weight | ~3.5 lb |
| Shoe | Flat bow |
| Material | S7 tool steel |
| Finish | Black oxide |
| Drop-in | Yes (mil-spec lower) |
| Compliance | ATF semi-auto (no burst/auto capability) |
| Manufacturer | Geissele Automatics |
The SSP is not compatible with Sig MPX/MCX or pistol-caliber carbine lowers. Verify your lower receiver is mil-spec before ordering. For more Geissele triggers and AR15 upgrade components, browse our Geissele trigger collection.
Safe Handling & Compliance
Per current ATF guidance, the Geissele SSP is classified as a semi-automatic trigger assembly — each round fired requires a discrete trigger function, and the device does not convert a firearm to automatic fire. Regulatory status has changed before and may change again; verify current federal and state law before ordering.
- Follow the four rules of firearms safety at all times: treat every firearm as if it is loaded, never point at anything you are not willing to destroy, keep your finger off the trigger until ready to fire, and be certain of your target and what is beyond it. Review the NRA’s four rules for a detailed breakdown.
- Some states restrict drop-in triggers or impose specific pull-weight minimums. Verify your jurisdiction’s regulations before installation.
- Perform a complete function check after installation: with the rifle unloaded and pointed in a safe direction, cycle the charging handle, pull the trigger to verify it breaks cleanly, hold the trigger to the rear while cycling the bolt again, then slowly release the trigger until you hear and feel the reset click. Confirm the hammer does not follow the bolt carrier during cycling.
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