Thanks for sticky'n this. I just did mine and should probably contribute w/ pics I took...
Basically, you need patience first. You aren't going to hack through this real fast or else your going to cut the shit out of your barrel. I took my time and still thought I had cut into my barrel bad but as soon as I popped the FSB off it was surprisingly a pretty damn good job I did. I also was going to cut the shroud off the end so I could betetr see where the barrel starts and the block ends but it doesn't really make a difference, just keep an eye on the end of the muzzle to check.
I went down one side right along the divets like Classy did, with a grinder to get through the bulk of the steel while being VERY carefull to check and check again the depth of the cut. Then I took a dremel cutting wheel and finished it with that. You want to cut almost
through (leave like a 32nd" or 64th" of steel) and then I whacked it with a hammer like he said to - but I didn't use a sledge, just a regular hammer. The cut I made was deep enough to make a longitudinal fracture along itself.
This is not enough though, to only cut one side, because it won't budge unless you get the dimples on the other side drilled out or cut through. I decided to just drill them on the other side like I should've done in the first place on the first. Then I cut between them with the grinder (AGAIN taking care to not go too deep) and whacked it, this time it spun free.
The holes go farther into the barrel than I expected so I didn't feel that bad about knicking the barrel a tad with the dremel. You don't even see it once you put the new FSB on anyway, and the Bulgy ones are almost as long as the Russian ones, mine was maybe a quarter" shorter. Not a big deal.
Here's another veiw, it's the other side I cut along w/ the grinder and dremel first.MAKE SURE YOU DO THIS:
Wrap your rifle in tinfoil if you are using the grinder because sparks fly everywhere. Usually I cut pipe @ work and am not used to being clean about it, but I had a rag at first covering the barrel from melted pieces of metal flinging everywhere and it caught on fire. If you care about your barrel being pretty, wrap it up!
Also, protect your crown. I stuck a patch-jig-thingy in mine with an oversized patch to plug the barrel and help protect the crown, especially while pounding the new sightblock on.
I took a string and indexed my front sight with the rear just as Classy says, (worked pretty good actually) and then I put the stock on and adjusted it with a RUBBER mallet tapping it slightly to get it perfect while leveling the rifle and looking down the irons.
BTW, cutting oil and WD-40 for the FSB is your friend!
I haven't put my pins in yet, I have a Bulgy FSB and it pins in with 2 pins. Before I do it, I should use the closest size smaller to the pin to drill the barrel with
, right? So it will be real tight when I drive them in? Won't it be loose if I use the same size bit that the pins are?EDIT:
What's in between 3/32 and 1/8 - it's 7/64? Whatever it is, that's what I used. Very tricky to drill into the side of a round barrel on that kind of angle but keept he drill plumbed up and you should get it perfect like I did in the first pin. The second went a little goofy but not too bad. Just use a hammer and punch to drive the pins in. DONE.
Edited by Kalashniklown, 05 December 2010 - 03:03 PM.