Is there a difference between between AK-74 and AKM rivets?
Just wanted to add that the short rivets for the forked rear, at least for a Bulgy fixed stock, are actually a little longer than a standard short rivet. AK Builder includes this size with the fixed stock 74 rivets he sells.m0ondoggy said:The front trunnion on a 74 uses 4 swell neck rivets as opposed to two on an AKM. The AKM (excepts some late Russian) tang uses 2 long rivets, whereas the rear tang on a 74 uses one long rivet and two short for the forked rear tang (except really early kits).
I am not saying what you did would be wrong, they should be fine.I'm pretty sure that when I crushed my rivets into the larger than normal 74 trunnion holes, the rivets expanded to fit the holes. I mean they do expand when you crush them, so what's the issue?
I have built several Ak-74's with his rivets. They work great.Vashthestanbeto said:what about the Akbuilder rivet size? I am used to order their AK74 and AKM rivets back when I was still building my own. Are they the correct size for the front trunnion swell necked holes?
I really can't see the difference, specially considering that these rifles are never fired full-auto. I dumped the entire "swell-neck" thing about 25 builds ago, and one of the Tantals I built afterwards has about five cases of rounds through it, and it has had no problems. The swell-necked thing is really not necessary for what we do.Vashthestanbeto said:In one occassion I discussed this rivet issue with Jimmy Streetman , owner of Armory USA, he told me that Ivan, who used to be his head enginner and held the same occupation in former Bulgaria State Arsenal, told him the usage of swell neck and specific size rivet being a great feature but isn't really necessary. From what he told jimmy, when they run out of swell necked rivets they just use normal flat rivet for all applications, and yet never had a problem, trunnion shifting or else with guns assembled this way in their service life.And those are even full auto "real deals" so I think our semi replica rifle will fare better.
Another approach comes from a book"testing the War weapons", somewhere in there was a record of rivets coming loose in M2 machinesguns after approximately 250,000 rounds. Thats a hell lot of shooting. with a fraction of recoil compared to .50BMG,It is very reasonable to believe that the rivet structure will most likely outlive the barrel longvility wise.
Just something I think is related to this topic and interesting.
BTW m0ondoggy Thanks for your reply, I built 5 guns with their rivets and love them to every bit.