Glock trigger problems: no reset, dead trigger, light strikes
Glock triggers fail in a handful of predictable ways, and almost every failure points to one part. This guide is organized by symptom: what you feel or see, what it means, and what to replace or adjust. Every diagnosis assumes an unloaded pistol, checked twice, with the ammunition in another room, and every fix ends with the function checks in the Safe Action guide and a hundred rounds at the range.
No reset: the trigger stays back after the slide cycles
You fire, the slide cycles, and the trigger does not return; there is no click and the next pull does nothing. The trigger spring has broken or come off its hook, which is the most common Glock spring failure. Strip the frame, hook a new spring between the trigger bar and the housing post, and confirm the bar rises when released. If the spring is intact, the bar is binding: look for a bent bar, dirt in the housing slot, or a drop-in trigger's pre-travel screw jammed against the frame.
Dead trigger: it moves but nothing happens
The trigger goes back with little resistance and the striker does not release. Either the striker was never caught by the cruciform, or the cruciform was pushed off the shelf before you pulled. Causes in order of likelihood: the pistol was reassembled with the trigger bar not seated in the housing; the trigger spring is off and the bar is resting low; a connector with an overtravel tab has been filed or fitted so the tab blocks the bar before release; the striker assembly is broken or the spring cups have come off; the trigger safety blade is holding the trigger. Strip and inspect in that order.
Light primer strikes
The primer shows a shallow dent and the round does not fire. Start with the cheapest cause: oil or debris in the striker channel slowing the striker; clean the channel dry. Next the striker spring: a reduced-power spring with hard primers, or a factory spring that is tired, gives light strikes; fit a factory or 6 pound spring. Next the striker itself: a worn or chipped tip, or a lightweight aftermarket striker on a light spring. Next the firing pin safety: a drop-in trigger adjusted so the plunger is not fully lifted at the break leaves the striker dragging on it; back off the pre-travel screw. Last, ammunition: some hard military primers need a full-power strike, and no fire-control part fixes that.
Gritty or creepy pull
A new pistol's pull feels sandy and the wall is vague. Polish the connector face, the trigger bar's tab and the underside of the firing pin safety plunger with a fine compound on a cloth, removing nothing but the roughness. Do not file. Most grit disappears in the first 500 rounds without help. A pull that has become gritty on a well-used pistol usually means dirt in the housing or a connector that has worn a groove; clean first, replace the connector second.
Heavy pull that used to be light
Dirt under the plunger, a trigger spring that has weakened, or a connector that has shifted in a worn housing slot. Clean, then replace the trigger spring, then look at the housing.
Trigger will not move at all
The trigger safety blade is stuck: dirt behind it, a bent blade, or on an aftermarket shoe a blade spring that has jammed. Clean and free the blade. If the trigger still will not move, the bar is jammed in the housing or the striker is seized in the slide; strip both.
Trigger moves but the slide will not close
With the trigger held back, the slide will not go into battery. The connector is not seated in the housing, or an aftermarket connector's tab is in the slide's path. Reseat or replace the connector.
Erratic ejection or brass to the face
This is an extractor problem before it is a trigger problem: a worn extractor depressor plunger assembly, a bearing that does not match the extractor, or a chipped extractor claw. Replace the plunger assembly first. If ejection is still erratic on a Gen 3 or early Gen 4 9mm with a 336 ejector, the 30274 housing is the factory's cure. A bent ejector, from a dropped pistol, throws brass in odd directions and is replaced with the housing. The housing guide lists the numbers.
Two shots from one pull
Stop. Unload. Do not fire the pistol again. This is a fire-control fault, usually a cruciform or shelf that has been filed, a connector cut past its angle, or a badly fitted aftermarket part, and the pistol is unsafe until the parts are returned to factory and the checks pass. It is also the one fault that can put you in legal jeopardy, since a pistol that fires more than one round per pull is a federal felony to possess regardless of how it got that way. Fix it before anything else.
Slide does not lock back on empty
Not a trigger fault, but often blamed on one. A thumb riding the slide stop lever, a tired magazine spring, or a worn slide stop. Check the grip first, then the magazine, then the lever.
The order of operations
- Unload and check twice; ammunition in another room.
- Clean before you replace anything; half of trigger faults are dirt.
- Replace the cheapest likely part first: trigger spring, striker spring, plunger assembly.
- Return any aftermarket part to factory to see whether the fault goes away.
- Run the function checks, then 100 rounds of the ammunition you use.
- Write down what you found.
The parts named here are described in the trigger bar guide and the connector guide. Browse springs, extractor parts and trigger parts; they ship to your door.
General information, not legal advice. Current as of September 2026. Laws change; check the official source before you act.
