Worked on the front sight base this morning. With the EDM, I can cut the base to shape and the proper width. Since it is adjustable for spread, it is in two pieces. I have the barrels set to cross by a few thousandths, so the sight base is closed when installed. Here it is fresh of the EDM.

The base has two set screws, one in the front for adjustment, and a lock screw on top to secure the setting. After I drill and tap the holes for the screws, I shape the base and tin the areas that will be in contact with the barrels.

Here it is soldered in place. I will cut the dovetail for the front and rear sights in one operation, so both bases need to be in place.

I've been shooting the heck out of my prototype rifle. It's more fun than the law should allow. Shot an 18" steel hog silouhette at 150yds yesterday. Can't say I had any kind of grouping, but was suprised I hit it consistently with open sights.....both barrels too! My son shot this video in front of the shop. The target is a block of tile grout that got wet and hardened, bottom right on the screen. It was getting dark, but watch it in full size and you can see the impacts.