Carbine 4595 misfires

Discussion in 'Hi-Point Carbines' started by YadkinRiver, Oct 11, 2017.

  1. Per request I am modifying the title to:

    Modified 4595 to 460 Rowland misfires.

    I have had a 45ACP 4595 for a year. From day one it has had a lot of misfires. I finally tore it apart and found only one firing pin spring installed. Called Hi Point and they said it should has two installed and they shipped me a new set. I installed the new springs and still have the same problem. Pin just does not strike primers hard enough. A friend of mine has a 4595 and I took mine over there today. His fires fine and does have a little more "sound" to the firing pin releasing. Any suggestions? Is this spring bent or streached?

    Last edited: Dec 22, 2017
  2. ajole

    ajole Supporting Member

    That's got nothing to do with the firing pin, that's the LRHO..

    Is your pin bent?

  3. No it is not bent. Plain and simple the firing pin does not apply enough strike to primer.
    Last edited: Oct 11, 2017
  4. duster066

    duster066 Supporting Member

    Something is not machined right. Striker or the bolt or the camber is to deep. Send it back. Or fix it yourself.
  5. cicpup

    cicpup Resident PITA Supporting Member

    When you installed the second shorter fatter spring, did you put it in front of or behind the firing pin?

    Your LRHO spring should not be bent like that, but as mentioned, has nothing to do with this problem. That's a whole nuther problem.
    Dane likes this.
  6. I put one spring inside the other. Should one go in front and one behind?
    duster066 likes this.
  7. duster066

    duster066 Supporting Member

    Nope, you got it right. If they sent you a new striker match it to your old one. See if both are machined the same. Also check your striker pin protrusion from the breach face of the slide. I'm no smith, so I don't have numbers memorized. But your striker should protrude about... 0.035" to maybe 0.045" if it's a lot less than this you probably have found a symptom. Not why, but a clue. If the chamber is machined to deep the striker will stand no chance of smacking the primer hard enough 100%. Also your striker bore may be tight, or have poor machining causing high friction. Polish it with some 400 wet dry taped and wrapped around a small rod. Mount in a drill if you want but go real slow. You only want to polish the bore. I found my JHP ran better wet. You might try that. However a wet gun is a dirty gun after 50 or so rounds. If you don't clean dry is better if the gun will work dry.
  8. gallowayprecision

    gallowayprecision Member

    Also when your doing all the firing pin work make sure to blow out the firing pin channel to make sure there isn't any loose debris from machining or from shooting in there. What brands of ammunition have you had issues with?
  9. I shoot only custom reloads that I reload. This gun was never fired before I converted it to 460 Rowland. I am taking it to a friend tomorrow . He has one in 45 ACP. We are going to tear both down and compare parts. It may have come from factory not firing.
  10. undeRGRound

    undeRGRound ROLL wif Da MOLE! Supporting Member

    The general rule is to break it in on regular ammo before any mods take place,
    and yes, you might have made changes to a faulty weapon in the first place :(
  11. duster066

    duster066 Supporting Member

    What!? Converted to 460 Rowland? Where was that in the OP? I'm out of here. Lol Just kidding cause I think it's cool, crazy but cool.
  12. IMG_20161102_113550087.jpg IMG_20161102_113550087.jpg

    Attached Files:

    Gunlove likes this.
  13. moona11

    moona11 King of you Monkeys Lifetime Supporter

    You broke it
    Can you guess what's wrong now. Think about it. Who did the work. The bitched up LRHO is also a sign that it was done by someone without a lot ofknowledge of the the weapon.
    Last edited: Oct 12, 2017
    2012gt and fatal-bert33 like this.
  14. The gun was purchased with one firing pin spring.
  15. moona11

    moona11 King of you Monkeys Lifetime Supporter

    You probably reamed it to deep
    Wasn't the gun taken apart to fo the mod?
    OldOutlaw likes this.
  16. My gunsmith originally took it apart. I pointedly asked him when I went by his shop" "how do you know how deep to ream". He took an ACP case and put in the chamber and showed me how the back of the brass was just even with the rear of the barrel face. After he reamed it the new 460R brass was in same position. I have considered that may be an issue. If you open the bolt and pull all the way back the firing pin extends out of bolt face maybe 3/16". You would think when fired the firing pin has the ability to move outward 3/16" when bolt is closed.
  17. Dane

    Dane + unkown number of likes Supporting Member

    I think the title needs changed to 460R misfires............ :rolleyes:
  18. Dane

    Dane + unkown number of likes Supporting Member

    Aren't you supposed to still be able to fire an ACP in a 460R gun?? Doesn't sound like that would happen here in this case.
  19. 20171013_094242.jpg 20171013_094340.jpg

    We have found the issue. After completely stripping the gun and cleaning we replaced the firing pine and springs. We slid the firing pin back and forth and it was rough. Removed the pin and springs and you can see where the failed springs last year wore ridges in the receiver.