This project is a new experience for me and a fun one, but now I have to ask what's the best way to fasten this inlay on the thumbpiece, I understand I have to install a tang bolt bottom up through the rear extension of the trigger guard through the wrist to thread onto the inlay? The inlay has a small lug where the bolt would thread into, I imagine you would have to use a flat nose tap, and to be sure that the bolt is properly aligned.
Any ideas on how is the best way to proceed on this? And the hole in the wrist is already pre drilled.
Thanks in advance.
I would finish inlet the thumb piece inlay first since it is pre-inletted now.
Probably not a lot of room for moving it around, just enough to get it straight.
Then use a drill bit that fits snug in the pre-drilled hole they provided you.
Clamp the inlay in place and run the drill thru the hole from the bottom trigger guard inlet up into the stud on the back of the inlay.
Just run the drill enough for the drill to leave a center point in the brass stud.
Don't attempt to drill a hole in the stud at this point as you don't really know if the bit is going to be centered on the stud,,,and #2,,the drill bit that fits the pre-drilled hole will be way to large as a 'tap-drill' size bit.
Once the stud is marked,,remove it and see if it is reasonably centered in the stud.
If it is and the size of the thread on the screw to be used can be drilled and tapped into it w/o run-out to the outside edge,,then you are OK there.
Go ahead an D&T the stud with the proper size drill for it.
It's a blind hole and you use a plug tap to finish cutting the threads to the bottom of it.
Not difficult, just take your time
If the center is way off,,then you will have to use a smaller dia screw size for a the attachment thread.
But, you can use the same scew that slides thru the pre drilled hole.
If the pre-drilled hole accepts a #8 for example, but a #8 thread would be off center to the point of cutting outside of the stud diameter,,,then just turndown and thread the last 1/2" of that #8 screw down to a #6 machine screw size.
That will make it so it will be contained within the dia of the brass stud.
It will be plenty strong for the attachment of the thumplate and the trigger guard tang.
With that figured,,now put the trigger guard in the stock and clamp.
Leave the thumb plate off.
Take the same drill bit that slides down the predrilled hole and from the top run it down and this time you can drill right through the guard. A clearance fit for the long screw.
Then counter sink hole on the outside of the guard for the head of the screw.
It will usually take some fitting of the final thread length so the screw draws the parts down tight and does not bottom out before then in the blind hole in the back side of the thumb plate