APEXgunparts Posted August 8 Report Share Posted August 8 For those that were interested in unused USGI recoil spring sets for the M3 / M3A1 Grease Gun, I just relisted them on the APEX Gun Parts web site. Richard Link to comment Share on other sites More sharing options...
Rekraps Posted August 8 Report Share Posted August 8 18 hours ago, APEXgunparts said: For those that were interested in unused USGI recoil spring sets for the M3 / M3A1 Grease Gun, I just relisted them on the APEX Gun Parts web site. Richard Just bought a set. Thank you! Link to comment Share on other sites More sharing options...
APEXgunparts Posted August 9 Report Share Posted August 9 On 8/8/2025 at 1:07 PM, Rekraps said: Just bought a set. Thank you! I appreciate the purchase! Richard Link to comment Share on other sites More sharing options...
tricky9914 Posted August 10 Author Report Share Posted August 10 I just ordered a couple sets as well. Thanks! Link to comment Share on other sites More sharing options...
APEXgunparts Posted August 10 Report Share Posted August 10 5 hours ago, tricky9914 said: I just ordered a couple sets as well. Thanks! Glad that these spring sets are finding their way to the people that can use them. Richard Link to comment Share on other sites More sharing options...
Rekraps Posted August 10 Report Share Posted August 10 9 minutes ago, APEXgunparts said: Glad that these spring sets are finding their way to the people that can use them. Richard I do believe that at some time in the past, there were questions on this Forum about OEM springs (coil count/dia/spring thickness etc.) that nobody was able to answer. Now we can. That being said, I also believe that the replacement springs on the market seem to work quite well in the guns. It was more of a detail thing.... Link to comment Share on other sites More sharing options...
APEXgunparts Posted August 10 Report Share Posted August 10 3 minutes ago, Rekraps said: I do believe that at some time in the past, there were questions on this Forum about OEM springs (coil count/dia/spring thickness etc.) that nobody was able to answer. Now we can. That being said, I also believe that the replacement springs on the market seem to work quite well in the guns. It was more of a detail thing.... In the past, we had a bunch of these springs from OOW ( we bought a warehouse of their surplus parts ) Back then we identified more than one type of spring. Those listings still exist on the web site, just OOS. Some were coiled in the opposite direction. We obtained these springs thru the recent buyout of another old time parts company. No telling if these springs were made in the 1940's or the 1960's. The red cellophane covering had all broken down so no marking was visible. The box they had been stored in was not the original DOD box, the previous shop just wrote what the springs were on the box. I recognized the red packaging from the OOW springs. Somewhere there exists a technical data package for the M3 and M3A1 Grease Gun, that is where you will find what is and what isn't specified for these "springs, helical, compression" Richard Link to comment Share on other sites More sharing options...
Frank I. Posted August 11 Report Share Posted August 11 This is the drawing for the M3 springs dated 1943, there may have been revisions in later years. Some of the data is hard to read. it LOOKs like 67-coils, length 13.5" - .75" Link to comment Share on other sites More sharing options...
APEXgunparts Posted August 11 Report Share Posted August 11 Interesting to see that the life estimate is 25,000 cycles. I learned a long time ago from a mechanical engineer that all spring life is expressed in cycles. I have also learned that modern springs can be made from material that will virtually never wear out ( but it is costly to do that ) Modern springs can be made to withstand high heat exposure as well ( again, not inexpensive ) Richard Link to comment Share on other sites More sharing options...
damifino Posted August 11 Report Share Posted August 11 Compliments to Mongo for a cleaner copy. With material specs. Link to comment Share on other sites More sharing options...
APEXgunparts Posted August 11 Report Share Posted August 11 Wow, dated 1966 as the last rev. Glad to see the sharing of actual tech data. I saved this for when I run out and see what my spring manufacturer can produce. They already make springs for the DoD , mainly firearms related. Richard Link to comment Share on other sites More sharing options...
Frank I. Posted August 12 Report Share Posted August 12 Nice addition ...I turned it so no one twists their necks Note how some specs changed...PERHAPS to alleviate the problem of the smaller M3A1 backplate beating out the back of the receivers? Link to comment Share on other sites More sharing options...
BillinBama Posted August 12 Report Share Posted August 12 Too Late! I already have a permanent crick in my neck! Link to comment Share on other sites More sharing options...
damifino Posted August 12 Report Share Posted August 12 Thanks Frank I. I have an advanced neanderthals technical abilities. I was lucky just to get it posted. 1 Link to comment Share on other sites More sharing options...
Rekraps Posted August 12 Report Share Posted August 12 9 hours ago, BillinBama said: Too Late! I already have a permanent crick in my neck! Oh my aching neck! Link to comment Share on other sites More sharing options...
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