First I apologize if this should be posted on a different forum. Tell me where and I will move it. You guys are Glock knowledgable. The Gen 4 G20 is my first Glock. I hope this is user related and not something warped or damaged. Disassembly: I follow the instructions, by pulling the trigger (after the safety check). When I start to reassemble, the slide goes all the way on but stops SOLIDLY when it is in the "normal" position. But the slide will not move further back to to reset the trigger. You know, as if you were going to chamber a round. Now the instructions say not to allow the trigger to move into the forward position during reassembly as it may damage the trigger safety. But doing that is the only way to get the slide back. Is something bent or am I doing something wrong? This happens about half the time, the other times the slide goes on and I can easily pull it back against spring pressure as if I was chambering a round. This with both the factory and Lone Wolf barrels.
Reassembly problem. Glock 20?? Gen 4
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Baby Fat Arky
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First I apologize if this should be posted on a different forum. Tell me where and I will move it. You guys are Glock knowledgable. The Gen 4 G20 is my first Glock. I hope this is user related and not something warped or damaged. Disassembly: I follow the instructions, by pulling the trigger (after the safety check). When I start to reassemble, the slide goes all the way on but stops SOLIDLY when it is in the "normal" position. But the slide will not move further back to to reset the trigger. You know, as if you were going to chamber a round. Now the instructions say not to allow the trigger to move into the forward position during reassembly as it may damage the trigger safety. But doing that is the only way to get the slide back. Is something bent or am I doing something wrong? This happens about half the time, the other times the slide goes on and I can easily pull it back against spring pressure as if I was chambering a round. This with both the factory and Lone Wolf barrels.
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Well I think problem sort of solved. A Google search took me to Firing Line and other posters on different forums with the same Gen 4 issue and especially with the 10mm. This was the fix and explanation:
"Put a small dab of light grease on the forward edge of the vertical projection of the trigger bar where the circle is in the picture.
Normally, the striker is forward when reassembling the gun and that means that the firing pin safety is in the fire/fired position. It's being held upward by the firing pin which is forward and therefore won't let the firing pin safety move downward under spring pressure.
Since the firing pin safety is normally already in the up position when you reassemble the gun, the vertical projection of the trigger bar doesn't have to push it upwards during the reassembly process.
When you move the striker back, it allows the firing pin safety to drop down to the "safe" position. Now, when reassembling the gun, the forward edge of the vertical projection of the trigger bar has to push the firing pin safety upwards. Since it's not nicely ramped like the rear surface, it can take a good bit of force--especially if there's no lubrication at all."
One Poster also said that he was told by Glock that they were removing from the manual the warning against moving the trigger bar forward while reassembling. That doing so was helpful in reassembling... which is what I found too. I will call Glock tomorrow to confirm that.
"Put a small dab of light grease on the forward edge of the vertical projection of the trigger bar where the circle is in the picture.
Normally, the striker is forward when reassembling the gun and that means that the firing pin safety is in the fire/fired position. It's being held upward by the firing pin which is forward and therefore won't let the firing pin safety move downward under spring pressure.
Since the firing pin safety is normally already in the up position when you reassemble the gun, the vertical projection of the trigger bar doesn't have to push it upwards during the reassembly process.
When you move the striker back, it allows the firing pin safety to drop down to the "safe" position. Now, when reassembling the gun, the forward edge of the vertical projection of the trigger bar has to push the firing pin safety upwards. Since it's not nicely ramped like the rear surface, it can take a good bit of force--especially if there's no lubrication at all."
One Poster also said that he was told by Glock that they were removing from the manual the warning against moving the trigger bar forward while reassembling. That doing so was helpful in reassembling... which is what I found too. I will call Glock tomorrow to confirm that.
I had a Gen 4 G20 and I have a Gen 4 G40 and had the same problem with both pistols. The issue is the position of the firing pin when you attempt to reassemble the slide onto the receiver. It doesn't require any lubrication to fix the problem. I just removed the slide from G40 and tried it twice confirming what I am about to explain. You can duplicate it very easily by doing the following:
1. Remove the slide from the frame
2. While holding the slide in a vertical position, muzzle down, rear sight up, take your finger and slide the exposed square protrusion of the (striker) firing pin up in its raceway until it seats in the full up position
3. Attempt to put the slide back on the frame...it will stop just short of sliding fully onto the frame
To resolve this:
1. Remove the slide from the frame
2. While holding the slide in the same vertical position as before, push the firing pin safety plunger fully in and if the exposed square protrusion of the (striker) firing pin doesn't drop down in the raceway, slide it down while depressing the plunger
3. Put the slide back on the frame and it will slide fully into place just like it is supposed to
No grease or any other lubrication is needed. You just have to remember to look at the position of the striker when reassembling the pistol and if it's not fully down in its raceway, push in on the plunger safety and it should drop down on it's own. If it doesn't, use your finger to do so while depressing the safety plunger.
Hope this helps.
1. Remove the slide from the frame
2. While holding the slide in a vertical position, muzzle down, rear sight up, take your finger and slide the exposed square protrusion of the (striker) firing pin up in its raceway until it seats in the full up position
3. Attempt to put the slide back on the frame...it will stop just short of sliding fully onto the frame
To resolve this:
1. Remove the slide from the frame
2. While holding the slide in the same vertical position as before, push the firing pin safety plunger fully in and if the exposed square protrusion of the (striker) firing pin doesn't drop down in the raceway, slide it down while depressing the plunger
3. Put the slide back on the frame and it will slide fully into place just like it is supposed to
No grease or any other lubrication is needed. You just have to remember to look at the position of the striker when reassembling the pistol and if it's not fully down in its raceway, push in on the plunger safety and it should drop down on it's own. If it doesn't, use your finger to do so while depressing the safety plunger.
Hope this helps.
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1 Posts
Great! Worked on my glock 29 and my 17 with after market trigger assembly.
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