Witt Machine bolt on muzzle adaptor

[Mobuck]

Has anyone tried this option for adding muzzle threading? I'm impressed with Witt's products which are substantial, precise, and simple although they tend to be a bit heavy. The bolt on piece is machined to match the measurements you provide for your particular barrel and uses 10 tiny screws to provide the clamping force to hold the adaptor in place.

 

[NikA]

The only problem I see with this approach is that it assumes the bore is concentric and square to the profile of the barrel. Depending on what your muzzle attachment is, that assumption may or may not matter. Most folks threading for suppressors will indicate off the bore, not the exterior of the barrel, to prevent issues. For a muzzle brake/flash hider, the distance is so short any misalignment is unlikely to matter.

 

[Mobuck]

Good point.

 

[rugerjunkie]

The other problem with the design is the gun wanting to throw it off the barrel under recoil. A friend of mine bought one for a deer rifle of his and had trouble with the first one fitting properly and the second one won’t stay put. He has tried actually using loctite between the brake and the barrel to get a tighter fit and although it is holding at the moment , is only a temporary fix that will eventually put him back where he started. He thinks the scratches the brake put into the Remington matte black finish will help the loctite get a good grip on the barrel now. He might be right but I doubt it’ll hold up over time.


Imo there isn’t anything out there to get a person around the “hassle” of taking it in to be threaded. If the rifle can’t be threaded due to ruining the value of either an expensive rifle or an heirloom , you won’t want to bugger up the end 2 or so inches of the barrel either. There’s your excuse to buy another rifle that’s already threaded or one you don’t care about clamping a brake on the finish.

 

[NikA]

I'm not sure what the built-in tolerance on these clamp-ons are, but I would posit that something like electrical tape or brass shim stock could be used to protect the barrel finish. It certainly works when clamping barrels for smithing purposes.

 

[Mobuck]

I have no doubt that the combination of clamping, a snug fit, and a dose of "rock set" or Lok-tite bearing and stud retainer will secure the device to the barrel. Adding "shim" material will only make things worse IMHO. The intended purpose of the WITT device is to secure a "sound moderator" rather than a true suppressor. Length, weight, and through hole tolerances are much different.

 

[recumbent]

He should use Loctite 640 retaining adhesive. That should fix his problem.
It's designed to hold ball bearings in a slightly oversize housing. Electric motor repair shops use it with excellent results.