firing pin stop

Discussion in '1911 Forum' started by epleyjoseph, Apr 15, 2013.

  1. epleyjoseph

    epleyjoseph New Member

    62
    0
    0
    So I ordered an EGW oversized firing pin stop to replace my factory one on my 1911 and I noticed a considerable difference in one of the dimensions. Is this going to be a problem??


    ForumRunner_20130415_220132.jpg

    You should be able to see the base of the EGW fp stop is actually smaller than the factory one. Any input/experience/etc would be appreciated.
     
  2. fa35jsf

    fa35jsf New Member

    1,180
    0
    0
    It looks like it should work. Put it in the gun and try it out.:)
     

  3. Axxe55

    Axxe55 The Apocalypse Is Coming.....

    7
    1
    0
    an oversize FPS will have to be fitted to the slide to work correctly. doubtful it will simply just slide in.

    just curious as to why the need for an oversize FPS?
     
  4. danf_fl

    danf_fl Retired Supporter

    12,358
    26
    48
    Normally that is used to stop the extractor from twisting (when one has extraction and ejection problems).

    Were you having ejection problems?
     
  5. epleyjoseph

    epleyjoseph New Member

    62
    0
    0
    I wanted to have a small radius or square bottom on the fps. This was JBM's original design and I've have heard a lot of reviews about it increasing reliability and reducing muzzle flip.

    I know that it will require fitting, but no amount of fitting will add material to a piece that is too small. The new oversized fps having a smaller bottom is my concern.
     
  6. danf_fl

    danf_fl Retired Supporter

    12,358
    26
    48
    Are you having reliability problems?

    I don't understand how it reduces "flip". Please elaborate.
     
  7. Overkill0084

    Overkill0084 Active Member

    4,910
    2
    38
    +1
    Reliability? If it ain't broken...
    Muzzle flip? Color me skeptical.
     
  8. epleyjoseph

    epleyjoseph New Member

    62
    0
    0
    I'm not a physics teacher, but I've read several discussions on the topic. Here's one of the better explanations...

    " How does it enhance reliability? By slowing the slide in recoil, thus reducing not only the recoil spring's backward shove on the frame...it reduces the level of whack when the slide hits the impact abutment...which is what causes muzzle flip...what we recognize as recoil.

    ...

    I found out a long time ago that the path to reliability is to slow the gun down rather than speeding it up. Slower cycling gives everything else the opportunity to keep up...notably the magazine. Because of the lower rearward slide velocity, it allows the use of reasonable recoil springs with no detrimental effects such as brass going into the next county and the dreaded frame battering that we hear so much about, but is actually much ado over...nothin' much. The most important effect, though, is that the magazine can keep up with the slide. Next is that it makes the gun more reliable in locking the slide on empty.

    ...

    How does the small radius accomplish these wonderous things?

    The slide cocks the hammer against the hammer's inertial mass and the mainspring's resistance. By lowering the point of contact on the hammer, it reduces the mechanical advantage, and ups the energy requirement in cocking the hammer. Because there's only so much energy available...some of it used up in overcoming the added resistance. A simple matter of leverage.

    But wait! There's more!

    By robbing the slide of some of its momentum...and robbing it as the instant that it starts to move...it adds a slight amount of delay. Delaying the slide...even a tiny bit...puts the bullet closer to the muzzle relative to the slide's position. The earlier in the cycle that the bullet exits, the sooner the force is removed from the system...and once the force is removed, the slide can only decelerate.

    ...

    And I want to repeat, just for the record. I don't use the small radius for purposes of recoil reduction. That it does have an effect on recoil is incidental, and was never something that I really considered beyond noticing it...determining why it happens...and ignoring it. Reliability is what it's all about. That's what I do."
     
  9. epleyjoseph

    epleyjoseph New Member

    62
    0
    0
    Reliability is the main concern here. Yes, I have had some feeding issues that MAY be solved by slowing down the motion of the slide as it strips the top round from the magazine. If that doesn't help, then I'm no worse for wear since this part and other parts I am installing are much higher quality than the cheaply made mim parts I currently have.
     
  10. SSGN_Doc

    SSGN_Doc Well-Known Member

    6,921
    42
    48
    If you are going down the trouble shooting path for reliability issues, you can also check your exractor tension and check teh hook area to ensure that it is radiused on teh leading edges wher the case rim enters the extractor.
     
  11. danf_fl

    danf_fl Retired Supporter

    12,358
    26
    48
    Wouldn't replacing the main spring accomplish the same?
    Most 1911 owners do not replace that spring, but they do not hesitate to replace the recoil and firing pin spring (and we know that springs lose tension).
     
  12. epleyjoseph

    epleyjoseph New Member

    62
    0
    0
    Theoretically, but the difference in force required to push the slide back wouldn't necessarily be as dramatic. Plus, the feeding issue was there even when my current main spring was still new.

    I will be changing my main spring pretty soon though.
     
  13. Axxe55

    Axxe55 The Apocalypse Is Coming.....

    7
    1
    0
    my suggestion is if you are having feed issue problems, start with the magazines, not the FPS. start with some quality magazines, like Tripp, McCormack or Wilson Combat.

    another question arises. what is the intended primary purpose of this pistol? reason i ask is, what you are talking about the radius of the bottom of the FPS can help with slowing down the slide and allow using lighter recoil springs. but most people who do this are competition shooters or those building a target pistol.
     
  14. danf_fl

    danf_fl Retired Supporter

    12,358
    26
    48
    Feeding issues are normally attributed to the ammo, then mags (if the firearm has not be mangled by a kitchen table gunsmith).

    I would try factory ammo and quality mags before making attempts at changing function of the firearm.
     
  15. Axxe55

    Axxe55 The Apocalypse Is Coming.....

    7
    1
    0
    ^^^^100% this^^^^

    this is exactly where i would start before trying to change the dynamics of how a 1911 works or functions.

    another thing that needs to be considered or addressed, is what is your skill level in modifying gun parts? do you have the proper tools?

    not trying to be an azz or anything, but just being realistic. normally when modifying gun parts to make them work, sometimes you have to make other adjustments or modifications to make them work in harmony.
     
  16. epleyjoseph

    epleyjoseph New Member

    62
    0
    0
    I've tried many different kinds of ammo with several mags.

    But this is all besides the point. I was asked if i had reliability issues, and the answer to that is yes. But even if that wasn't an issue, I'd still replace the cheap Taurus mim parts with quality ones, and included in that would be changing out this FPS.

    Some people appear to be under the impression that I'm trying to change the intended function of the pistol. However, it would be more accurate to say that I am returning the pistol to it's ACTUAL intended function. The 1911 was INTENDED to use a FPS with a flat or only slightly beveled bottom. It was only changed because of complaints from the army that it was difficult to rack the slide with the hammer down.
     
  17. epleyjoseph

    epleyjoseph New Member

    62
    0
    0
    I do not have extensive experience in modifying firearm components. But I have found it difficult to acquire experience without actually doing it, lol. Besides, if I mess it up, then I'm only out a 13 dollar part.
     
  18. danf_fl

    danf_fl Retired Supporter

    12,358
    26
    48
    I understand that.

    If there is a reliability problem and Taurus has a lifetime warranty, why not let them fix it?
    (Then it is done by the manufacturer who is made aware that there could be a problem. You can learn by seeing what action they took to fix the problem. Win for you and win for maufacturer.)
     
    Last edited: Apr 16, 2013
  19. Axxe55

    Axxe55 The Apocalypse Is Coming.....

    7
    1
    0
    i'm with Dan. it has a warranty, please use it.

    honestly, i don't think changing the FPS would solve the problem if it's feed issue. i understand where you are coming from and understand your reasoning, but 1911's have been using a beveled FPS for many years now with no problems. yes you are correct, that it can help slow down the speed of the slide, but i just don't believe it will solve a feeding problem. it might, but IMO i just don't see it.
     
  20. epleyjoseph

    epleyjoseph New Member

    62
    0
    0
    Thank you guys, I often forget that Taurus has a lifetime warranty I can take advantage of! I will definitely mention it to them and see what can be done.

    If they fix the feeding issue, however, I will probably still change out the FPS (I'll at least try it and see what effect it has and then decide if I want to keep it). It's not a permanent change and can be easily undone if I don't like the results.