A step by step video on how to clean and disassemble your Glock 21 Gen4 handgun.
Recommended Gun Cleaning Supplies for Your Gun Cleaning Kit
STEP BY STEP ON HOW TO BREAK DOWN AND CLEAN YOUR GLOCK 21 PISTOL FOR BEGINNERS
This instruction will work on other Glock models as well, but we’re using the Glock 21 here as an example.
Let’s go ahead and first make sure that the magazine is removed and that your firearm is unloaded.
Now that we are sure the gun is cleared, release the slide, point the gun in a safe direction and pull the trigger.
Wrap your hand around the rear of the firearm like you see us doing here and pull back on the slide.
You don’t need it to go far back, just a little will do.
Now with your other hand pull down the takedown lever.
You can release and push the slide forward.
Pull out the recoil spring.
Then the barrel.
Now we’re going to grab a firearm parts tray. You’ll want to use something to contain the parts and allow them to soak in some CLP.
Place the recoil spring, barrel and slide into your parts tray.
Now grab your CLP and spray down all the parts in your tray. CLP is essentially a solvent for gun cleaning as well as a gun lubricant. It's a must have for your gun cleaning supplies.
Be sure to give a few squirts down the bore.
Everything else gets a good soaking as the CLP is going to do the heavy lifting for you when it comes to cleaning your handgun.
Now let’s pull out the rest of our gun cleaning supplies.
You’ll want a durable cleaning cloth that won’t tear on the sharp edges of your gun.
Next you’ll want to grab a .45 cal bore cleaning kit for buffing out your Glock 21’s bore. A bore cleaning kit is similar to a bore snake, but it gives you a full bronze brush instead of a few integrated bristles in the buffing rope.
You’ll want a set of gun cleaning brush and picks to help scrub the carbon and whatever gunk that might be attached to your Glock.
Some firearm grease will be handy if you’re really putting the rounds through your gun.
Lastly you’ll want to get a hold of some long stemmed gun cleaning swabs.
Now we’re going to give all the parts that have been soaking in parts tray a scrubbing with a nylon gun cleaning brush.
We’re concentrating on the barrel first. Use the brush to break up any carbon on its exterior. Get in and work on the lug as well.
After that, the recoil spring could use a light brushing.
Then you’ll spend the most time on the slide. Get in and brush down the rails. If you have a small end on your nylon brush, this is a great spot to use it.
You’ll want to give the breech face a good scrubbing as well.
Concentrate some effort on the extractor. It’s this little part that we’re pointing to here.
This is a crucial part of your firearm that you want to keep clean.
When you’re done with the interior, give the exterior a scrub down as well.
The interior of the frame could use a cleaning while we’re at it as well. Hit the rails and trigger group. A little work on the magazine well wouldn’t hurt either.
Next we’ll grab a hold of our gun cleaning swabs and get to those areas that is going to be tough to reach with our gun cleaning cloth.
This will include certain areas of the barrel’s lug.
Then get to work on the slide. The pointed end of our gun cleaning swabs works really well for getting in there.
Take your time and pay attention. Grit left behind will increase the wear and tear on your firearm so make sure to get everything out of there.
After that get clean up the frame. Hit the rails and anywhere else that looks like it has carbon on it.
Finally we’ll pull a .45 caliber bore cleaning kit through the bore. You could pull the kit through while the firearm is assembled, but since it’s already broken down, we’ll do it like this.
Be sure to send it through the breech end of the barrel and pull it through towards the muzzle.
If the kit is tight, good, you want it to be. A tight fit ensures a solid cleaning.
One pull through usually has the bore looking like glass.
Now everything gets a wipe down with your gun cleaning cloth. Get all the surfaces on the exterior and interior.
As you clean off the parts from the parts tray, set them aside on your gun mat for reassembly.
Get to work on the slide next. We won’t bore you with showing you each and every surface being cleaned. You get the picture.
After that wipe down the frame. You can send your gun cleaning cloth through the magazine well to clean that up and make sure there isn’t excess CLP in there.
Now we’ll want to give all metal parts a light spritz of CLP to properly lubricate it.
Get the slide, frame and barrel.
A little on the recoil spring will help prevent any rust at could occur.
Step Fourteen (optional)
CLP in most cases works perfect for lubrication. But if you blow through ammo and don’t clean your gun as often as you should, a little bit of firearm grease might be necessary.
Apply a little bit to the lug and barrel. You can disperse it with a gun cleaning swab.
Then place the barrel in the slide.
Hit the rails in the slide with a little bit of grease as well.
We’ll now insert the recoil spring assembly.
After that you can push the slide back onto the frame.
Rack it a few times to make sure everything is smooth and buttery.
And there you have it, a cleaned and lubricated Glock 21.
Sage and Braker, Crafted at the highest caliber.