negev5021 25 Posted May 25, 2010 Report Share Posted May 25, 2010 (edited) I posted in another section I was having failures to feed, the most predominant one for me looked like this: Uploaded with ImageShack.us It occured more often than I would ever expect and it seemed the barrel "hood" was not long enough. After reading ad nausium I found several mentions of barrel hood enlargement, but never got the true low-down. So I took my S12 to a fellow shooter who has a machine shop, and had him add some material to the barrel hood. I took some measurements before: Uploaded with ImageShack.us Then off I went. We decided to weld w/stainless steel, as it would not require refinishing upon completion. I must say I was sceptical as I never have done something like this, but figured if it came out all jacked up I could alway get it back to the way it was. After the welding in looked like this: Uploaded with ImageShack.us It added about 3/16 or so, and was pretty rough. I went straight to work on smoothing it out, and with minimal effort got it to here: Uploaded with ImageShack.us It is back to functioning level, that is the bolt closes the same as before, and it clearly catches the shell better, with I believe no chance of the same ftf. I am thinking of grinding some more to make it smaller, and the underside is tough to get to, so still a bit of work in process. I have yet to test fire and will post again when I do. Edited May 25, 2010 by negev5021 1 Quote Link to post Share on other sites
Cobra 76 two 2,677 Posted May 25, 2010 Report Share Posted May 25, 2010 Watching this topic...thanks for sharing. As I stated before, I have a 410 that needs this same mod. The barrel hood on it was shortened some by the previous owner for some unknown reason. Quote Link to post Share on other sites
negev5021 25 Posted May 31, 2010 Author Report Share Posted May 31, 2010 Got out to the range over the weekend, and am pleased to say I did not have the FTF problems I had before. I did the best I could to polish/smooth the added tap, and it is in my opinion a fuctional modification for the original problem. Here is a pic: Uploaded with ImageShack.us I squared things up a a bit and shorted to overall length of the tab, and am happy with the results. Quote Link to post Share on other sites
12 Guage Ninja 1 Posted June 30, 2010 Report Share Posted June 30, 2010 Mine has the same ftf problem, but only when I rapid fire it as fast as I can. The shell jams up in the same spot. But When I fire it about one round per second it never has a problem. Quote Link to post Share on other sites
Racer 27 37 Posted June 30, 2010 Report Share Posted June 30, 2010 I had ftf like that when I made some mags. I fixed it by using the AGP spring instead of the surefire spring and I haven't had one happen again. I would still like to do this but I'm scared about taking a welder to my shotgun. That looks pretty good in the last pic. Quote Link to post Share on other sites
Paulyski 2,227 Posted July 2, 2010 Report Share Posted July 2, 2010 That perticular FTF issue is usually because your mag spring can't keep up. I would ask 2 questions. 1- with the mag dissassembled & using a shell as a feeler gauge, is there ANY drag whatsoever on a shell at the mouth (top) of the mag? There's not supposed to be. If there is, It'll cause drag, slowing down the shell & it will cock up & feed like that. The fix is just like the Promag, but with the Surefire, you only have to do it once. 2- do you have those issues with the Russian 5, or just the surefire? Also Racer's right about surefire springs being weaker than AGP. But, as long as it locks up right, I guess it's a safeguard. Next smooth the front of the extractor slot a touch (tiny bit) so that can't grab the shell. Quote Link to post Share on other sites
negev5021 25 Posted July 4, 2010 Author Report Share Posted July 4, 2010 I have the trouble most with the surefire 12 round - which is the money mag for 3 gun...I looked up the agp springs and they say they are for the 10 rounder, so not sure if it will help the surefire 12 round. I know it was a rifle fix for a mag problem, but it worked and kept me tinkerin with the Saiga.... really don't know what I will do with myself when it is completely up and running - probably will do a refinish or left side charging handle... Quote Link to post Share on other sites
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.