It's part of part # 235 in the manual (which is really comprised of multiple parts that are not individually named from what I can tell), called the "riveted sear bar". Essentially it's the cylindrical pin/tube/bar that appears right next to the number "235" in the RDB manual schematic and connects the "sear bar" and two "hammer linkages" (both names I'm just making up here) to eachother.What pin is that?
What brand ammo was it? Approx age?there was green residue on my ammo. the RO said that was corrosive ammo. if i didn't clean my gun it would rust and fall apart. (same 1000 rnd box as last time). when i opened it up to clean it, i had no rust or unusual wear. the rifling and throat looked pristine, no pitting or rust. i wonder if the RO was mistaken.
i wonder if corrosive ammo could be cause for pins to wear down. for example, a hardened pin may react to corrosive ammo and consequently be prone to misalign or fall out. i still have 500 more rounds of this stuff too.
Either you misunderstood what he said, or this "range officer" had no idea what he was talking about.there was green residue on my ammo. the RO said that was corrosive ammo.
I believe that is true. I've never heard of corrosively primed .223 anywhere, and certainly not for sale in the USA.There's no such thing as corrosive 5.56 just urban legends.
What you have appears to be South African M193 ball, made by PMP, in the military style packaging. It should work fine, and is non-corrosive.the reason i purchased this ammo was because its reviews said it was good ammo, and not too cheap to cause reliability problems.