The bag of countersunk rivets showed up from MSC today. For some reason I'm still a bit dubious of their holding power compared to regular rivets, but I guess if the trunnion starts to loosen up I can re-rivet it and then do a rosette weld on each side.
The sculpturing inside the Galil stub and the dimples in the blank made it impossible to use the copper backup bar. The welding came out good anyway.
Welding the opposite side was more difficult. The Coldsteel blank wasn't quite the same height on each side, so I had to twist it until the top rails lined up. This left a gap along the weld seam. There was some blobbing on the inside, but not too bad.
Notice the heavy scale on the Galil rear stub - that's after being belt sanded, too.
I trimmed the top of the trunnions flat. A cleanup cut on the right side came out right at .375", so I used a 3/8" lathe bit as a spacer to clamp it in the vise.
First cut. The width needed to be 1.202" to fit the .062" receiver. The flycutter tip was chipped; dressing it made a mirror-bright finish cut.
.020 narrower on each side; the .062 Chinese guns are like this, so there shouldn't be any problem.
Nice! I wish my machining projects came out that nice.
Feh! I cherry-picked the pictures. First pass on the trunnion, I used a 1/2" end mill. Left the damnedest corrugated finish I ever saw; I'm still not sure WTF happened. So I dug out the old standby flycutter. You also missed all the head-scratching and cursing when the sides of the receiver didn't line up with the trunnion...
Due to my inexpert welding and enthusiastic application of the angle grinder the receiver will never be pretty, but it will be entirely hidden inside the stock. Mostly all you see is the top cover and barrel bits.
My fancy blue laminate stock for the Ross build showed up today. It's the "Tac-Driver" from rifle-stocks.com. And there's plenty of meat, horizontally and vertically, to inlet it for an AK receiver.
can you post some pics of the stock with a AK reciver sitting on top of it?? Ive been thinking about a Vepr style build for a while with one of those stocks. also how is the quality and hom much will it take to finish one out??My fancy blue laminate stock for the Ross build showed up today. It's the "Tac-Driver" from rifle-stocks.com. And there's plenty of meat, horizontally and vertically, to inlet it for an AK receiver.
I've been meaning to get your picture. It'll be Real Soon Now.
Meanwhile, I was expecting the usual wavy surface finish from the ball-end router bit I've seen in stock duplicator pictures. Instead it's relatively smooth; it looks like they might have used a small disc sander to knock off the high spots. The three slots in the front are precise, chatter- and burr-free. The work around the finger grooves isn't too pretty, but there's plenty of wood to shape it the way I want. Of course, it came uninletted, so I can't comment on that, but I did have them cut a 3/4" barrel channel to guide my inletting later.
All in all, it's more finished than I expected, but it will take a lot of work to make it as nice as I want. But it's all finish work; the shaping is properly done.
And it's bright blue!
It didn't occur to me until it came in that I could glue some of the 7/16" Russian birch plywood I have on hand to make a blank, and practice inletting on that. I've found very little useful information on inletting to start with, and bupkis on doing laminate..