+ Reply to Thread
Page 1 of 2 1 2 LastLast
Results 1 to 10 of 14

Thread: Are no4 mk1 and no4 mk2 extractor springs the same?

Click here to increase the font size Click here to reduce the font size
  1. #1
    Member Fruler's Avatar
    Join Date
    Apr 2019
    Last On
    Yesterday @ 12:20 AM
    Location
    Missouri, north America.
    Posts
    75
    Local Date
    06-03-2020
    Local Time
    02:44 PM

    Are no4 mk1 and no4 mk2 extractor springs the same?

    Time to replace my extractor spring on my no4 mk2... The rifle ejects dummy rounds just fine, as the dummy cases are bulleted, making the dummies long enough to hit the ejector screw in back of receiver. However, it's not ejecting spent cases, they just fly right back into the receiver. I stripped the bolt head apart and examined it... Spring has seen better days I believe... Reassembled bolt head to not lose anything... So after researching I see springs for no4 mk1 rifles but don't see any that explicitly say no4 mk2 rifles... So is a No4 ejector spring a no4 ejector spring that will work with either the no4 mk1 or no4 mk2 rifles? Just looking for reassurance... Thanks guys, I appreciate any feedback!!!


  2. # ADS
    Friends and Sponsors
    Join Date
    October 2006
    Location
    Milsurps.Com
    Posts
    All Threads
     

  3. #2
    Really Senior Member Steve H. in N.Y.'s Avatar
    Join Date
    Aug 2008
    Last On
    05-30-2020 @ 07:26 PM
    Location
    You get one guess
    Posts
    513
    Local Date
    06-03-2020
    Local Time
    03:44 PM
    The springs are the same.

  4. Avoid Ads - Become a Contributing Member - Click HERE
  5. #3
    Really Senior Member Strangely Brown's Avatar
    Join Date
    Mar 2009
    Last On
    Today @ 06:00 AM
    Location
    Wiltshire UK
    Age
    68
    Posts
    437
    Local Date
    06-03-2020
    Local Time
    08:44 PM
    Quote Originally Posted by Steve H. in N.Y. View Post
    The springs are the same.
    I beg to differ Steve, there is a difference in the two.
    Mick

  6. #4
    Advisory Panel
    Peter Laidler's Avatar
    Join Date
    Jul 2008
    Last On
    11-26-2019 @ 09:07 AM
    Location
    Abingdon, Oxfordshire. The home of MG Cars
    Posts
    16,240
    Local Date
    06-03-2020
    Local Time
    09:44 PM
    Mmmmmmmm, news to me Strangely. But I could be wrong

  7. Thank You to Peter Laidler For This Useful Post:


  8. #5
    Member Fruler's Avatar
    Join Date
    Apr 2019
    Last On
    Yesterday @ 12:20 AM
    Location
    Missouri, north America.
    Posts
    75
    Local Date
    06-03-2020
    Local Time
    02:44 PM
    Thread Starter
    Quote Originally Posted by Strangely Brown View Post
    I beg to differ Steve, there is a difference in the two.
    Wow no idea. I'm glad I asked. Still searching Google for a mk2 spring and haven't found any at all.

  9. #6
    Advisory Panel Brian Dick's Avatar
    Join Date
    Apr 2008
    Last On
    Yesterday @ 01:18 PM
    Location
    Edgefield, SC USA
    Posts
    3,705
    Local Date
    06-03-2020
    Local Time
    03:44 PM
    They are the same. If you need some nos original No.4 extractor springs I have plenty. Email to bdlltd@bellsouth.net. Beware the aftermarket springs that are dicey to say the least.

    Brian

  10. #7
    Really Senior Member Sunray's Avatar
    Join Date
    Mar 2009
    Last On
    03-14-2020 @ 02:19 PM
    Location
    London, Ontario
    Posts
    983
    Local Date
    06-03-2020
    Local Time
    03:44 PM
    The extractor and its spring have nothing to do with ejection. The extractor spring is there to return the extractor to its 'start' position after the case head is under the extractor and after ejection. It doesn't power ejection though.
    "...Spring has seen better days..." Maybe, maybe not. $10.80US for a new repro($15.70 for a brand new one. $13.50 for a used unknown condition one.) at Gunparts.
    "...long enough to hit the ejector screw..." OAL length doesn't matter. Case length does.
    "...it's not ejecting spent cases..." It's most likely that you're not operating the bolt with enough, um, vigor.
    Oh and the only difference between a Mk I/Mk I* and a Mk II is where the trigger connects to the receiver.
    Spelling and Grammar count!

  11. #8
    Advisory Panel Brian Dick's Avatar
    Join Date
    Apr 2008
    Last On
    Yesterday @ 01:18 PM
    Location
    Edgefield, SC USA
    Posts
    3,705
    Local Date
    06-03-2020
    Local Time
    03:44 PM
    The extractor spring is key to strong ejection since it holds the fired case hard against the channel in the left side of the body which guides it to the ejector screw.

    Anyone who wants original, new old stock No.4 extractor springs can get them from me @ $10 each. You can buy crap repros from Sarco and GPC if you want for more money but you'll be wasting it because in my experience, they don't work well if at all.

  12. Thank You to Brian Dick For This Useful Post:


  13. #9
    Advisory Panel
    Peter Laidler's Avatar
    Join Date
    Jul 2008
    Last On
    11-26-2019 @ 09:07 AM
    Location
    Abingdon, Oxfordshire. The home of MG Cars
    Posts
    16,240
    Local Date
    06-03-2020
    Local Time
    09:44 PM
    Brian is correct. The spring forces the rim against the shallowing sidewall of the body and causes the extractor to act as a fulcrum to eject the case.

  14. #10
    Really Senior Member Strangely Brown's Avatar
    Join Date
    Mar 2009
    Last On
    Today @ 06:00 AM
    Location
    Wiltshire UK
    Age
    68
    Posts
    437
    Local Date
    06-03-2020
    Local Time
    08:44 PM
    Quote Originally Posted by Peter Laidlericon View Post
    Mmmmmmmm, news to me Strangely. But I could be wrong
    I'll bow to the superior knowledge on here but in the past when buying spares I've been offered two distinct types, one with a much shorter side which was marked for No.4's only.
    Is this just a difference in manufacture?
    Mick

+ Reply to Thread
Page 1 of 2 1 2 LastLast

Similar Threads

  1. Main springs
    By harry mac in forum The Lee Enfield Knowledge Library Collectors Forum
    Replies: 4
    Last Post: 02-21-2015, 05:28 AM
  2. Extractor Springs (video mini lesson) - AGI Gunsmiths
    By Badger in forum Gunsmithing for Old Milsurps
    Replies: 0
    Last Post: 09-08-2014, 06:24 AM
  3. P1 mag springs
    By BigCity in forum Other Military Service Pistols and Revolvers
    Replies: 1
    Last Post: 12-02-2013, 12:22 AM
  4. Springs
    By Bubba-7 in forum M1/M2 Carbine
    Replies: 7
    Last Post: 09-02-2012, 01:06 PM
  5. Wolf springs
    By fungun1 in forum M1/M2 Carbine
    Replies: 8
    Last Post: 06-12-2011, 05:22 PM

Tags for this Thread

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts