That makes sense, will check with my machinist to see what hes got to do this, normally just use a metal hole cutter right at the reinforced rim, then blue the edges of both the removed plug and hole and reattach with black aquarium sealant,,,better than having the hole and still ATF compliant.
you're method sounds fine and would look ok, don't forget the 'welded obstruction'.
There is a post on these boards about the 'slot' to replace the hole; it is about 3/8" wide and 7.5" long to equal the bore area. Some folks think the slot looks better than the hole; but if you fill in the hole as you plan, it would 'disappear'.
I'm rather sick/disappointed...I finally won a Type 91 grenade from a guy on Epay...Jokingly asked if he had the Knee Mortar for sale...He said he just sold it two weeks ago...Not demilled, complete with the carrying case...$200!!!
I thought you can still do that with registered dewats. Many people say you cant get these registered, but I saw a post 1968 RPG for sale that was registered. I would just pay the 200 dollars and have a nice complete mortar.
I recently read a post to that effect; i.e. you can file a form one and when approved, re-activate the grenade discharger(destructive device) but not MGs. Better check with the BATF if you are serious.
re-activation of grenade discharger/destructive device
Doss published a copy of a letter from BATF in the September 2007 Banzai,
it clearly stated that a 'destructive device' can be reactivated by filing a form 1, having it approved, and paying the $200 tax.
Unfortunately it would have to be deactivated before it could be 're-activated'.
Crash, I'm really interested in the knee mortar you have, especially the strange arsenal marks on it. Are you going to bring it to Tulsa ? Do you have a table ? Please kindly advise how I can see it if you are bringing it to the show. I plan to be there Friday morning.
Most people here are advanced collectors and care more about these unique weapons than the money we could get by destoying any historical value. You came here asking US (Japanese collectors) for help. Your the one that stated "it will be cut up and for sale at Tulsa". I just connected the dots. My opinion still stands, I'm glad you will go through the proper channels to make it legal again.I am also a better person than you, as I didn't bash you with insults. I do have a life and if I ever got a grenade discharger I would want to get it legal at all cost.So you have a good day and try not to destoy any more history in the up coming months.