Redacted 0 Posted September 27, 2012 Report Share Posted September 27, 2012 Hi,my name is Mike. New guy here. I always hate my frist post to be a question but I need somehelp. I just bought a sagia in .223 from a friend of mine and I see the he used a spring pin to hold in the gas piston in place. Can someone tell me if that is acceptable. Thank You Quote Link to post Share on other sites
pjj342 632 Posted October 12, 2012 Report Share Posted October 12, 2012 (edited) What do you mean by 'spring pin'? Assuming that the action works back and forth normally and the 'spring pin' isnt sticking out from either side of the rivet hole, you are probably good. "spring pin" makes me wonder though. Edited October 12, 2012 by Boomsick42 Quote Link to post Share on other sites
Agent Lemon 157 Posted October 12, 2012 Report Share Posted October 12, 2012 One of these? I suppose it could work. If I wanted to keep it that way, I would check it after every time I shoot it. Although I have to say, that is kind of half-assing it. I would say that it is even more half-assy than a bolt on components, since the gas piston is actually important. I would go ahead and rivet it anyway though. Worse case scenario, if you realize that you cannot form the rivet for whatever reason, you can always go back and put the spring pin in there. Quote Link to post Share on other sites
poolingmyignorance 2,191 Posted October 12, 2012 Report Share Posted October 12, 2012 One of these? I suppose it could work. If I wanted to keep it that way, I would check it after every time I shoot it. Although I have to say, that is kind of half-assing it. I would say that it is even more half-assy than a bolt on components, since the gas piston is actually important. I would go ahead and rivet it anyway though. Worse case scenario, if you realize that you cannot form the rivet for whatever reason, you can always go back and put the spring pin in there. If this is whats been used, it should be fine. Sig used them as the recoil spring retainer on there op rods. Which actually resides inside the gas tube. That is assuming it was drilled the correct size to begin with. Quote Link to post Share on other sites
Redacted 0 Posted October 12, 2012 Author Report Share Posted October 12, 2012 Thank you for the replys. Yes that roll pin or tension pin is what he used and it is flush with the sides of the bolt carrier. I will order a rivet to have on hand. Do they make over sized rivets if I need one ? Thanks again Mike Quote Link to post Share on other sites
Agent Lemon 157 Posted October 12, 2012 Report Share Posted October 12, 2012 Not sure if they make oversized rivets. Check AK-builder, they have most of what one would need. Although in retrospect, if your friend has fired it a lot with the spring pin, then maybe it will be okay. I would still keep inspecting it after every shoot though. The trigger guard on my neglected AR is kept inside by what looks like a spring pin. Looks okay so far lol. Quote Link to post Share on other sites
poolingmyignorance 2,191 Posted October 13, 2012 Report Share Posted October 13, 2012 Not sure if they make oversized rivets. Check AK-builder, they have most of what one would need. Although in retrospect, if your friend has fired it a lot with the spring pin, then maybe it will be okay. I would still keep inspecting it after every shoot though. The trigger guard on my neglected AR is kept inside by what looks like a spring pin. Looks okay so far lol. Thats good advice. Another thing I would suggest, is check the pin for play, and see if it feels like it slides back and forth inside the carrier. Your can always use a center punch to flare the ends. Quote Link to post Share on other sites
Redacted 0 Posted October 13, 2012 Author Report Share Posted October 13, 2012 I did not shoot it yet, but u can't move the pin. The pin is in good, when I hit it with a punch it did not move. Quote Link to post Share on other sites
poolingmyignorance 2,191 Posted October 13, 2012 Report Share Posted October 13, 2012 I did not shoot it yet, but u can't move the pin. The pin is in good, when I hit it with a punch it did not move. Put one round through it and check, then put a few throught it and check. Then just make a habit of checking it after every mag till your comfortable. Sig uses these things on 1,000nds of rifles. I wouldn't worry too much about it. But it's never a bad idea to periodicly check your gun anyway. Oh and make sure your pin is flush on both sides of your carrier you don't want it tearing up your rear gas block. Quote Link to post Share on other sites
Redacted 0 Posted October 13, 2012 Author Report Share Posted October 13, 2012 I should get a chance to shoot it on tuesday. I will check it every couple of rounds. Thanks for the help. Quote Link to post Share on other sites
TheDarkHorse 216 Posted October 13, 2012 Report Share Posted October 13, 2012 That's called a roll pin and they are a very common fastener. Given it is the correct size for the hole, you should never have a problem with it in there. It will be there until you remove it with a press. Quote Link to post Share on other sites
poolingmyignorance 2,191 Posted October 13, 2012 Report Share Posted October 13, 2012 That's called a roll pin and they are a very common fastener. Given it is the correct size for the hole, you should never have a problem with it in there. It will be there until you remove it with a press. Roll pin is what I've always known them to be called. But it's not uncommon for mechanics to use a diffrent name than distributors/ sales men. Like try buying gaskets from somplace like grainger and see all the silly explanations you get when you tell them you need a 4" 150# neoprene! Quote Link to post Share on other sites
Redacted 0 Posted October 17, 2012 Author Report Share Posted October 17, 2012 I had a chance to shoot it to day and put 200 rounds down range. Looks like the pin will do fine, it did not move. I will still continue to check it. Thanks for the help Quote Link to post Share on other sites
TheDarkHorse 216 Posted October 17, 2012 Report Share Posted October 17, 2012 If it makes you feel better, I have a milled AK and it is put together with almost all roll pins including the gas block. Never had an issue... Quote Link to post Share on other sites
mancat 2,368 Posted October 24, 2012 Report Share Posted October 24, 2012 Most AK pistons are also pinned, but with a tapered-head pin. I don't expect you'll have a problem, but you might check it now and then if you're worried. A dab of loctite would help ensure the pin stays in place. Quote Link to post Share on other sites
Redacted 0 Posted October 24, 2012 Author Report Share Posted October 24, 2012 I have about 400 rounds through it now & the roll pin has not moved. The only prolbem I have now is failure to extract with wolf ammo, but i fixed that by not shooting it anymore. Quote Link to post Share on other sites
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