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Discussion Starter #1
My first DIY project!

I got a Romanian Underfolder kit today. How do I remove the old rivets from the rear trunion??

Do they go all the way through??

After I get them out. Where do I get rivets to replace them??

I plan to put this underfolder on a SAR-1. I'm thinking I can handle that myself.

I have a drill press, dremel and I think I can set (2) rivets.

Any advice or input is greatly appreciated!!!!

Thanks in advance!
 

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DD
You have to drill the heads off the rivets and then peal off the old reciever part. but I have found the easiest way is with a air hammer and a very sharp chisel bit. get it up under the head of the rivet and cut it off. After you get it done then carefully grind whats left of the rivet shaft down flush to the trunnion and very important..centerpunch the rivet. Then mount it in a drill press and drill the rest of the rivet out. I usually start out with a small drill and work my way up. sometimes when its almost all gone the rest will just push on out the bottom. The short rivets can usually be knocked on out with a punch once you get em ground flush. Be carefull in each of these steps not to grind or drill into the trunnion.
All in all you will be setting 5 rivets. 4 short and a long. Rivets can be had at Kvar. I bought some bulgies from them that worked out well. Tapco sell rivet sets but the only thing I found them to be any good for is trigger guard. Try to find the bulgarian ones they worked good for me. By the way......Nice avatar
 

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Discussion Starter #3
Bullet175,

Thanks. I think can handle that. I'll need to pick up some type of clamp or vise that I can use to hold the part on my drill press. Maybe some c-clamp vise grips.

The Romanian underfolder trunion looks to only use (2) long rivets.

I'll check out K-var for the rivets then. I take it you mean this part:

http://www.k-var.com/product.asp?0=216&1=259&3=568

LOL! I get a lot of compliments on the avatar. The weird ones want
to know if that is my ass. Mine is way more hairy... :sick:
 

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Thats the one long rivet at the top. Go ahead and get the whole rivet set. 11.99. That way youll have extras in case you bugger one up. Plus you will need the short ones as anyway.
 

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Discussion Starter #5
I think I'll post a pic of the Romanian underfolder trunion tonight. It only has holes for (2) rivets. They both look to be long rivets.

So I'm thinking I'll need like (4) long rivets (2 as spares) and a couple short rivets to fill in the rivet holes when I remove the scope rail.

My planned base gun for the underfolder conversion is a SAR-1.
 

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Here is the rear trunion for the I/O under folders. It takes two (2) long rivets.



 

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Discussion Starter #8
AK-DAVE,

Do your Romanian underfolder parts look like the ones in pic one or two??



 

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Be very careful on those long rivets. If they're anything like the ones on the AMD, there is a possibility that they will be a PITA. I broke countless bits in mine, because my hole ran into the edge of the hole in the trunnion. Be sure when you start with a small drill bit, that you center it up as best you can!
 

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Discussion Starter #10
yosuthnmasa,

Thanks for the heads up! :D

PS: Your avatar is oddly hypnotic!
 

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DiverDown,

Picture one. Round bars.


The one arm hits on the selector lever pivot pin head and the stock doesn't lock folded. Debating on which to grind on, the head of the selector or the arm. Probaly do some of both, worried about the strength of the arm and what is too much on the selector.




The rivets are a PITA. Save so money by spending some. Buy better bits, the black oxide bits don't last more than 2-3 rivets. Every long rivet I've had to drill completely through to get out. AMD-65 was my first; the long rivets were about the only hassle. Never thought about the holes for the folder, keep in mind the distance between the arms and selector. I even used a different top cover; the original looked too short and put the rear trunion into the end of the receiver.
 

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Discussion Starter #12
AK-Dave said:
DiverDown,

Picture one. Round bars.


The one arm hits on the selector lever pivot pin head and the stock doesn't lock folded. Debating on which to grind on, the head of the selector or the arm. Probaly do some of both, worried about the strength of the arm and what is too much on the selector.




The rivets are a PITA. Save so money by spending some. Buy better bits, the black oxide bits don't last more than 2-3 rivets. Every long rivet I've had to drill completely through to get out. AMD-65 was my first; the long rivets were about the only hassle. Never thought about the holes for the folder, keep in mind the distance between the arms and selector. I even used a different top cover; the original looked too short and put the rear trunion into the end of the receiver.
I'm glad you pointed that out about the folder hitting the selector lever. I'll be checking that on mine brefore assemebly.
 
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