balmo Posted March 18, 2017 Share Posted March 18, 2017 Nearing 3k on my CK Arms Thunder open. I had 2 FTE during practice today. MBX mag spring just recently installed. Should I be thinking of putting in the second spring on my Aftec extractor. Thank you. Link to comment Share on other sites More sharing options...
ShortBus Posted March 18, 2017 Share Posted March 18, 2017 Funny you mention this. I have a new top end with an aftec and 1 spring and ~2500 rounds. I've been getting FTE all of a sudden. I ordered a pack of springs from Dawson ($5) and plan to run the gun again Sunday. Hoping this fixes it. Link to comment Share on other sites More sharing options...
theWacoKid Posted March 18, 2017 Share Posted March 18, 2017 Soon as possible. But do note that loads that generate higher peak pressures have a greater likelihood of creating extraction problems among other things. My CK never left a piece of brass in the gun including the whole time I ran one spring. Link to comment Share on other sites More sharing options...
sclagg Posted March 18, 2017 Share Posted March 18, 2017 Is there a reason you're only running one spring.. I've ran 2 springs out of a Bedell and an Akai.. with very little to any issues. Curious.. because I'm building a new 9 major and am always looking for secret sauce. Thx.. Link to comment Share on other sites More sharing options...
BeerBaron Posted March 18, 2017 Share Posted March 18, 2017 Aftec reccomend just running the rear spring for the first few thousand rounds as 2 brand new springs can create too much tension. After that first few thou you take the (now weaker) rear spring and put it in the front hole and add a new spring to the rear. You then repeat this process every 5,000 or so (throw out front spring, move back to the front and new one in the back). They say doing 2 new springs can make it too tight. Link to comment Share on other sites More sharing options...
36873687 Posted March 18, 2017 Share Posted March 18, 2017 Just woundering I had two wore down springs, an replaced with two new ones. Should I have left one used one in with a new one Link to comment Share on other sites More sharing options...
BeerBaron Posted March 18, 2017 Share Posted March 18, 2017 If it works then that's fine. A friend of mine had not replaced his springs in 10k rounds and started having fte's. He moved back spring to front and I gave him a new spring for the back (which was noticeably longer than his old ones) and it's run fine since. So if it it works I say just leave it. Do the spring rotation thing next time. Link to comment Share on other sites More sharing options...
digi531 Posted March 18, 2017 Share Posted March 18, 2017 I run 38 super comp and have always used two springs from the start and with no issues. You can compress the springs every so slightly with small pliers and use both springs then slide the round up the breach face and check tension. Link to comment Share on other sites More sharing options...
36873687 Posted March 18, 2017 Share Posted March 18, 2017 11 hours ago, BeerBaron said: If it works then that's fine. A friend of mine had not replaced his springs in 10k rounds and started having fte's. He moved back spring to front and I gave him a new spring for the back (which was noticeably longer than his old ones) and it's run fine since. So if it it works I say just leave it. Do the spring rotation thing next time. I ran 300 rounds with the two new springs an worked 100%. But I did hold one to the used an abused ones. Thank u Link to comment Share on other sites More sharing options...
DialTone301 Posted March 21, 2017 Share Posted March 21, 2017 My daughter had issues with her gun going into battery when it was new and running 2 springs. Removed 1 and never had another issue. She has around 5000 rds thru it now and is still running 1 spring. Link to comment Share on other sites More sharing options...
accu9 Posted March 22, 2017 Share Posted March 22, 2017 My FGW Open build shipped with a sheet that said to run 1 spring in the Aftec for the 1st 5,000 rounds. I went about 6,000 and then started experiencing a somewhat erratic ejection pattern (no failures, but the brass was being kicked all over the place with no consistency). Moved the original spring to the front and put a fresh spring in the rear and it's 100%. Link to comment Share on other sites More sharing options...
pitvpr Posted March 23, 2017 Share Posted March 23, 2017 I run both springs right out the box all the time, no issues... Link to comment Share on other sites More sharing options...
CrashDodson Posted March 24, 2017 Share Posted March 24, 2017 I run both out of the box in .40 major with no issues. I did compress the springs in a vice a little before using them. Link to comment Share on other sites More sharing options...
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