RDB-S Front Sight Removal - How-to for Kel Tec RDB-S
There are 1/2x28 threads hidden under the front sight of the Kel Tec RDB-S, which you need to get at in order to mount a flash suppressor, sound suppressor, or muzzle brake. Why Kel Tec decided to hide the muzzle threads on a gun that they went to so much trouble to make suppressor-friendly is beyond us, but enough jibber jabber - let's dive in.
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We added a Midwest Industries folding AR15 front sight on the optic rail to replace the factory front sight,
and swapped in an extra-thin competition sight post since the sight radius is so short on this gun.
For bonus points, install the new front sight before removing the old one, and you
can zero on the new front sight post by just lining it up with the factory sight post.
and swapped in an extra-thin competition sight post since the sight radius is so short on this gun.
For bonus points, install the new front sight before removing the old one, and you
can zero on the new front sight post by just lining it up with the factory sight post.
Next up - tools. You will need:
- Penetrating oil (Liquid Wrench is the best combination of cheap and effective, so says this guy on Youtube)
- 2mm hex key (allen wrench)
- Universal socket (Kel Tec installs and removes using a custom tool not available to the public - this is the next best thing)
- Heat source (a cigarette lighter works fine)
- A vice to hold the gun is helpful (remove the handguard and clamp onto the barrel itself, not the receiver)
Let's kick off the step-by-step.
Step 1
Use the 2mm hex key to remove the two grub screws (#1 below, one on either side) keeping the sight straight. These should come out easily, in fact, one of ours was halfway backed out before we did anything (Kel Tec probably should have staked them).
Step 2
Grab your universal socket and see if you can get the notched nut (#2 below) off. We couldn't, but maybe you'll get lucky. If it won't budge, proceed to Step 3 below.
Step 1
Use the 2mm hex key to remove the two grub screws (#1 below, one on either side) keeping the sight straight. These should come out easily, in fact, one of ours was halfway backed out before we did anything (Kel Tec probably should have staked them).
Step 2
Grab your universal socket and see if you can get the notched nut (#2 below) off. We couldn't, but maybe you'll get lucky. If it won't budge, proceed to Step 3 below.
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Step 3
Grab your penetrating oil and just go nuts - spray all around the muzzle, from all directions. Spray some into the holes where the grub screws used to be, too.
Step 4
Wait 24 hours to let the penetrating oil do its thing. This step really does help.
Step 5
After 24 hours, come back and use your heat source on the notched nut, trying as much as possible to keep the heat on the nut itself rather than the sight or barrel. We held our cigarette lighter on there for 45 seconds.
Step 6
Take another crack at it with the universal socket. The sight should come off easily at this point. If it doesn't, just keep trying with heat and penetrating oil until it slips for you.
Grab your penetrating oil and just go nuts - spray all around the muzzle, from all directions. Spray some into the holes where the grub screws used to be, too.
Step 4
Wait 24 hours to let the penetrating oil do its thing. This step really does help.
Step 5
After 24 hours, come back and use your heat source on the notched nut, trying as much as possible to keep the heat on the nut itself rather than the sight or barrel. We held our cigarette lighter on there for 45 seconds.
Step 6
Take another crack at it with the universal socket. The sight should come off easily at this point. If it doesn't, just keep trying with heat and penetrating oil until it slips for you.
The fruits of your labors - exposed 1/2x28 muzzle threads.
And that's it - the world of muzzle devices is now your oyster. Shoot us a message on the Contact Us page if you have questions.
Happy shooting.
Happy shooting.