Riveted are factory. Check this out https://www.hkpro.com/forum/hk-parts...buttstock.html
I’ve seen multiple types of the convex stocks, and some have two rows of rivets, like the one posted in the picture posted, while others have less rivets. I had heard, but have no idea, that the ones with two rows of rivets may be contract or not factory, while others have said they’re factory but HK just changed the way they secured the pad to the metal part. Any help would be greatly appreciated!
I have one as well that came on an II-coded 93 and it does not have the rivets. This said, I can tell you with confidence that HK produced them both ways — you can even buy the repair kits for them, or could several years back.
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NRA Endowment - Life
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Do you mind if I ask, did your II date code rifle come factory with the 178 barrel?
The very second HK I bought was an II date code, and neither the buyer nor myself knew what he had, but it turned out to be a pristine rifle and later after looking the gun over I saw the 178 marking and did some research and figured out they aren’t exactly common
RTG Parts sells them, if I am not mistaken. I believe NUMRICH also does.
Yes, it is a 178-marked barrel. I ended up buying two of those over recent years. One brings back bad GB memories. Seller had it listed on GB for $3k. Stupidly, I asked him if the barrel was marked 178? He came back and said yes, asked what that meant. When I naively explained it to him, the price went up $300. (The correct question I should have asked "what markings are on the barrel?" ..and nothing more) Live and learn. I am still happy I purchased it.
Faster twist for heavy ammo -- will stabilize the 62 gr ammo. 1 full twist in 7 inches or 178 mm.