I seen a build (another site) where a guy painstakingly welded in rivits to simulate that hole
Its a solid milled piece of metal....that accommodate the parts for the rifle... The trunnions do the same thing, only for stamped receivers that otherwise lack the features.
I don't think it's a big deal but I would weld it up at this step for sure (which I figure he was going to because he put it on the internet).
We don't say this to be rude we say it because we don't want our "friends" here on the forum to do something that will get them in trouble unknowningly. ATF determination of what is intent to build a MG is thier own interpitation at the time so if you want to rule out any possible intent charges you should always start by filling in the pin and saftey sear channel as mentioned above. I think he is a great welder from the looks but I would just recomend changing the order around a little to be sure you don't get a battering ram on the door in the middle of the night ;-)
ok just for future reference what do we call the front and rear of a milled receiver? since everbody on site has corrected me, I'd hate to make this mistake again. you no 6, half dozen that sort of thing.
Front and rear stubs. Trunnion implies a stamped reciever build.
In that case you could say you manufactured a trunnion. You can't do it with out modifying the stub so you could then call it I trunnion I guess. On a milled receiver you don't have a trunion so you only have to use 5 parts to make the gun 922r compliant vs 6 parts for a stamped receiver AK. The rear trunnion "stock tang" Is not a countable part.