Question for CAF armourers or others knowledgeable on C79s

[AG]

Someone who will not be named, seems to have overtightened the knobs on my C79 Elcan mount, mounted on a rifle and now the knobs seem to be stripped and cannot be loosened. Anyone with experience with this can help?

 

[Rebel Rouser]

You can get a new base from Armament Technology.

 

[lerch641]

I'm guessing you've already loosened the knob and that's how you figure it's stripped?

 

[Gunnerlove]

I am guessing they are the overmolded plastic knobs with a brass insert.
Cut the plastic part of the "wing nut" off with a utility knife. You can then back off the inserts with a pair of pliers or vicegrips.

File the ends of the bolts to remove the peening and replace the plastic junk with decent nylock nuts (over a washer) torqued to 25 inch pounds.

Cheap easy fix that leaves you in a better place than a the factory pushed out.

 

[Dsiwy]

Sounds like a FCS/EO tech problem

Seriously do what Gunnerlove said, but you can probably buy new ELCAN metal knobs.

 

[-[Crosshair]-]

Sounds like a FCS/EO tech problem

This

Gun plumbers do not even touch optics.

 

[AG]

I am guessing they are the overmolded plastic knobs with a brass insert.
Cut the plastic part of the "wing nut" off with a utility knife. You can then back off the inserts with a pair of pliers or vicegrips.

File the ends of the bolts to remove the peening and replace the plastic junk with decent nylock nuts (over a washer) torqued to 25 inch pounds.

Cheap easy fix that leaves you in a better place than a the factory pushed out.

Thanks for this

 

[dieseldog]

Thanks for this

Knobs on mine appear to be solid anodized aluminum. If not readily available from one of our site sponsors such as Nordic Marksman I would go to a fastener supplier and purchase a helicoil kit that matches the screw thread size and helicoil it back to size as there's lots of meat in the knob---Dieseldog!

 

[AG]

Knobs on mine appear to be solid anodized aluminum. If not readily available from one of our site sponsors such as Nordic Marksman I would go to a fastener supplier and purchase a helicoil kit that matches the screw thread size and helicoil it back to size as there's lots of meat in the knob---Dieseldog!

Thanks but mine appear to be the plastic type Gunner mentioned.
It's an older one, like 1992 ish or so