I would not ditch it . I think a forward bolt set up is a good idea. you just ned some thing substantial between the bolt an the carrier .
the cut to install the bolt from the front end you can do with a grinder a sleave or block for the bolt steam could be done with a drill press the correct bit an grinder.
Any shop with a welder could do it for very little.
if you want the slot welded in send it to me ill do it. I think a well fitted block with a hole in it an groove cut with a cut off wheel could be done with minimal tools .
the ramp that extend forward to allow the carrier to ride over the rounds makes it a little challenging . id just grind it off an also square off the face were a block would fit an grind a bock to fit tht cant spin with the bolt installed an then drill it for the bolt while its in place . run a cut off wheel down it to make a grove for the extracter the bolt will keep the block in place . id make the block hold the bolt completely forward an then grind the back of the carrier to allow the hammer to strike. the block should be some type of steel that harder or can be hardend an you would have to do some fitting an chamfering were the bolt head would fit.
the bulgy carrier is cut away different on the lh side for some reason vs a akm x39 carrier possably to save weight its a good place to get a block installed .
Id weld the block in . I know what its like to work with minimal tools.
id be willing to weld up the slot for free . it will cost you to ship it.
were are you located ?? maybe there is a member close who can help
do you have a dremel or better yet a compressor an die grinder???
im trying to think what I have that I could make you a sleave out of that would be strong enough that id feel comfortable sending to you that you could just install with minimal fitting a cut to allow you to install the bolt from the front .
I have some old barrel stubs that cold be bored /drilled out. if the od is big enough that they could be fitted so they wont spin they might be just the ticket the stem is
.3455 so a 30 cal stub would work . I wish I knew the exact angle on the bolt head if I did it would be a easy lathe project an would not take my any time to do .
I hate to see any guy who was willing to turn barrel journals on a wood v blocks an afile an drill have to give up.
I have been looking at my bolt an carrier s all day an thinking hmmmmm.
the ramp for to ride the carrier over the shells is in the way imo an on a standard 7.62 carrer does not even stick out like on the bulgy 5.45 . imo it can be eliminated . id rather have a sleave there. so the rounds are not jumping up an down so much in the mag as the carrer rides over them .
you basically need a sleave about one inch long that has a .346 or so hole in a slot for the ejecter to run a way to keep from spinning . possably part of the protruding ramp could be left for a tap to index in a slot to stop spinning or a tang on the sleve to hit the carrer could be added . might need some milling or grinding to allow it to get through the feed lips on you mag.
if it were mine id weld the slot closed add a block between the bolt an carrier as well or build up the area were the bolt hits an then cut a slot to install the bolt from the front it would be a 10 minute job with a welder. if you want me to, id do it. free. I figure its the least I could do after spending 4 hours staring at this LOL
back when stuff was cheap guys just welded the bolt in . LOL I was never for that .