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Monday, January 14, 2013

Glock Detailed Disassembly

Let me start by saying that it is possible to never take a Glock pistol apart past a field strip for cleaning and never have an issue. That being said, there are some reasons to disassemble a Glock further, such as a detailed cleaning or parts replacement.

The entire system can be  disassembled using a punch. This demonstration is done using a 3rd generation Glock 17 RTF and with an actual Glock punch. Different models and calibers can have slight differences, but are all basically the same.
Start first by removing the magazine, and visually and physically inspect the chamber to ensure there are no rounds present and the firearm is safe to work on.
After verifying the pistol is unloaded, field strip by charging the slide, then point in a safe direction and pull the trigger. Pull the slide back about 1/8" and depress both sides of the slide lock, allowing the slide to move forward off of the receiver. You now have the upper and lower portions of the firearm separated.
For the slide, the recoil spring assembly lifts out when pressure is applied towards the front of  the slide, giving way for the barrel to be removed.
Place the punch underneath the protrusion of the firing pin, resting on top of the firing pin channel liner. This step may be easiest by placing the front face of the slide down onto a flat surface. Apply pressure downward, and remove the slide plate. Place your thumb over the area exposed where the slide plate was and remove pressure from the punch. These parts are spring loaded, and can shoot out of the back of the slide if not careful.
Press down on the firing pin safety, which allows the loaded chamber indicator to be removed  from the side.
The parts removed from the slide from top/bottom left/right: Extractor depressor plunger assembly, firing pin assembly, slide plate, loaded chamber indicator, firing pin safety assembly. These assembly breakdown further as follows:
These two parts simply pull apart from each other, into firing pin safety and siring pin safety spring.
These also pull apart separating extractor depressor plunger, extractor depressor plunger spring, and spring loaded bearing.
The firing pin assembly is a bit trickier to take down. Place the assembly on a surface with the striker facing straight up.  Grabbing the spring, apply pressure downward, exposing the spring cups in two halves. Carefully remove these, and take care when reassembling the assembly, as these can be very easy to lose if the spring slips. Once the spring cups are removed, the firing pin spring, firing pin channel liner and firing pin slide apart easily.
That's it for the slide with the exception of the front and rear sights. The rear sight is of  a dovetail design, and is best removed or adjusted by a gunsmith or the use of a sight pushing tool. The front sight post is held in place by a 3/16" hex screw. With all of the parts disassembled from the slide, next is the receiver:
Removing the trigger pin can be a pain. There are notches on the pin which catch on the slide stop lever.  By applying pressure on the back end of the lever and lifting the lever's middle from the inside of the frame, it relieves the pressure holding it into the pin's notch. Without the pressure, the pin is free to slide from left to right:
Trigger pin and slide stop lever removed.
Next, remove the locking block pin right above the trigger pin. This allows the locking block to be pried out.
To remove the slide lock, use the punch to push the slide lock spring down to meet the frame, allowing the slide lock to slip out of the side of the receiver.
The slide lock spring can be removed by placing the punch underneath where the  spring protrudes, and prying directly upward. Be sure to push the punch as close to the central bend of the spring to avoid warping or breaking it.
Remove the trigger housing pin, which allows the trigger assembly to lift out of the receiver. This example has the extra grip adapter which comes with a replacement longer pin.
The magazine release is generally the most difficult piece to remove from the frame, and is best achieved using a flathead screwdriver. Hold the magazine release in place, and use the flat edge of the screwdriver to move the spring over to the open notch of the release. Then rotate the screwdriver allowing the spring to slip outside of the channel, letting the magazine release push through the frame. Then the spring can be pulled up and out.
The trigger assembly is taken apart by rotating the trigger with trigger bar up and out of the trigger housing, and disconnecting it from the trigger spring. Then the connector is pushed out from the left side of the housing via a small channel with the punch.
That is every piece of the receiver. Remember to reinsert pins from right to left, opposite of the direction they were taken out. Again, follow all steps in reverse to reassemble.

And that's it! Hopefully following these step-by-step instructions will allow any Glock owner to maintain and replace parts on their pistol without the need for unnecessary expense on professional services.

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