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9/19/2017 7:27:10 PM
Posted: 1/15/2006 6:41:19 PM EDT
My M16 upper has a roll pin in the FSB swivel.

Did the early M16's use roll pins there? The uppers now use a rivet.

I was wondering when the change happened with the military.
Link Posted: 1/15/2006 6:48:08 PM EDT
Yes, the early ones did use roll pins. I don't know when the change to a rivet took place.
Link Posted: 1/15/2006 6:50:40 PM EDT
Thanks. I love those old uppers.

That brings to mind another question. If either works, what's the big deal with a roll pin or rivet in newly assembled uppers?
Link Posted: 1/15/2006 6:50:53 PM EDT

Originally Posted By Triple_D:
Yes, the early ones did use roll pins. I don't know when the change to a rivet took place.



+1 here, the early ones did have the roll pin.
Link Posted: 1/16/2006 8:17:36 AM EDT

Originally Posted By AtlantaFireman:
Thanks. I love those old uppers.

That brings to mind another question. If either works, what's the big deal with a roll pin or rivet in newly assembled uppers?



No deal at all. When I had the barrel of my SP1 carbine shortened to XM177E2 specs back in 1978, it came back from the shop w/a roll pin instead of the rivet it had gone out with. Never gave it a thought, & it's atill there.

Never have figured out why they went to the rivet. Must save them all of 1/10th of a cent per rifle.
Link Posted: 1/17/2006 6:03:51 AM EDT
Thanks.
Link Posted: 1/17/2006 8:54:14 AM EDT
It's probably to do with mass production. Is the rivet a slip fit ? If so then it would be much faster to put together when compared to a roll pin. If the rivet is a tight press fit then I don't have a clue.

Shot it yet ?

rj
Link Posted: 1/17/2006 9:23:49 AM EDT
Not yet. Still working on getting a smooth side BC.
Link Posted: 1/17/2006 12:58:01 PM EDT
That will be pricey. Cool though.

rj
Link Posted: 1/17/2006 1:06:29 PM EDT
Yes, I am finding out just how pricey it really is to get a slab side BC. I'd trade a notched Stag/CMT BC for a slab side BC, but I doubt that no one would take that trade.
Link Posted: 1/18/2006 2:16:05 PM EDT

Originally Posted By AtlantaFireman:
Yes, I am finding out just how pricey it really is to get a slab side BC. I'd trade a notched Stag/CMT BC for a slab side BC, but I doubt that no one would take that trade.



I saw one at a gun show a couple of years ago but it was an M16 BC back when that was verbott. I think it was $160 bare.

rj
Link Posted: 1/31/2006 11:16:54 AM EDT

Originally Posted By AtlantaFireman:

I was wondering when the change happened with the military.



Just got a 1969 M16A1 parts kit last week, and a couple of 1971 kits, the 1969 has a roll pin, the later ones are rivets. So, sounds like about 1970.


Link Posted: 1/31/2006 11:28:49 AM EDT

Originally Posted By Ekie:

Originally Posted By AtlantaFireman:

I was wondering when the change happened with the military.



Just got a 1969 M16A1 parts kit last week, and a couple of 1971 kits, the 1969 has a roll pin, the later ones are rivets. So, sounds like about 1970.





May I ask where you are getting all these old M16A1 kits?
Link Posted: 1/31/2006 11:31:49 AM EDT
[Last Edit: 1/31/2006 11:33:06 AM EDT by Ekie]

Originally Posted By Forest:

Originally Posted By Ekie:

Originally Posted By AtlantaFireman:

I was wondering when the change happened with the military.



Just got a 1969 M16A1 parts kit last week, and a couple of 1971 kits, the 1969 has a roll pin, the later ones are rivets. So, sounds like about 1970.





May I ask where you are getting all these old M16A1 kits?



Got these three from an ad on Buddy's.
Link Posted: 1/31/2006 12:12:45 PM EDT
Oh yeah, I have had a roll swivel roll pin back out on me, happened on my Model 02 upper.
Link Posted: 1/31/2006 12:17:32 PM EDT

Originally Posted By Ekie:

Got these three from an ad on Buddy's.



Private Ads in a newsletter or website? Or is there a company out there advertising these for sale?
Link Posted: 1/31/2006 12:20:19 PM EDT

Originally Posted By Forest:

Originally Posted By Ekie:

Got these three from an ad on Buddy's.



Private Ads in a newsletter or website? Or is there a company out there advertising these for sale?



IM your way.
Link Posted: 1/31/2006 6:32:39 PM EDT
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