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10/16/2007 5:33:49 PM EDT
Anyone ever have this problem?  The trigger pin works loose after 20 rounds or so.  Never had this problem before.  The lower is a Superior Arms and the pin is from DPMS.  Any suggestions?

Thanks,
10/16/2007 5:34:37 PM EDT
[#1]
I have a DPMS lower parts kit that does the same thing in a CAV ARms lower.
10/16/2007 5:52:21 PM EDT
[#2]
Doesn't the trigger pin have a groove on one end of it?  If so, one leg of the hammer spring is supposed to ride in it to keep the pin from moving.
10/16/2007 6:05:30 PM EDT
[#3]
make sure the hammer spring is put in the right way, not backwards
10/16/2007 6:07:22 PM EDT
[#4]
That's one of the reasons why KNS Precision makes their Anti-Rotational Pin Sets.
10/16/2007 8:17:50 PM EDT
[#5]
your hammer is in wrong.
10/16/2007 9:57:31 PM EDT
[#6]

Quoted:
your hammer is in wrong.


No, the hammer spring is in correctly, the gun fucntions great until the pin works out, somewhere between twenty and thirty rounds.  Either the trigger pin hole is over sized, or the trigger pin is under sized, or a combination of the two.

Do they make larger trigger pins?

10/16/2007 10:32:27 PM EDT
[#7]

Quoted:

Quoted:
your hammer is in wrong.


No, the hammer spring is in correctly, the gun fucntions great until the pin works out, somewhere between twenty and thirty rounds.  Either the trigger pin hole is over sized, or the trigger pin is under sized, or a combination of the two.

Do they make larger trigger pins?



Are the "legs" of your hammer spring resting ON the pin itself? The pins have notches where the legs of the spring SHOULD rest. THIS prevents the pins from "walking" out.

pic courtesy of kevinholman.com


10/17/2007 3:57:43 AM EDT
[#8]
you need to hit the pin with a left handed hammer....
10/17/2007 4:11:56 AM EDT
[#9]

Quoted:

No, the hammer spring is in correctly, the gun fucntions great until the pin works out, somewhere between twenty and thirty rounds.  Either the trigger pin hole is over sized, or the trigger pin is under sized, or a combination of the two.

Do they make larger trigger pins?



Again, take a look at KNS stainless steel pins or their Anti-Rotational pin sets.  They come in different diameters.  KNS Precision
10/17/2007 6:18:36 AM EDT
[#10]

Quoted:

Quoted:
your hammer is in wrong.


No, the hammer spring is in correctly, the gun fucntions great until the pin works out, somewhere between twenty and thirty rounds.  Either the trigger pin hole is over sized, or the trigger pin is under sized, or a combination of the two.

Do they make larger trigger pins?



I've seen this several times, it's always been the hammer spring.  And yeah, the weapon will usually function right up untill the trigger pin walks out,.

Take it to a gunsmith so he can flip your hammer spring for you, or charge you for a bunch of crap thjat you don't need.
10/17/2007 9:25:50 AM EDT
[#11]

Quoted:

Quoted:

Quoted:
your hammer is in wrong.


No, the hammer spring is in correctly, the gun fucntions great until the pin works out, somewhere between twenty and thirty rounds.  Either the trigger pin hole is over sized, or the trigger pin is under sized, or a combination of the two.

Do they make larger trigger pins?



I've seen this several times, it's always been the hammer spring.  And yeah, the weapon will usually function right up untill the trigger pin walks out,.

Take it to a gunsmith so he can flip your hammer spring for you, or charge you for a bunch of crap thjat you don't need.


+1 Just what he said.  You don't need anything else like the KNS pins.  Just double check your hammer spring.
10/18/2007 7:12:23 AM EDT
[#12]

Quoted:

Quoted:

Quoted:

Quoted:
your hammer is in wrong.


No, the hammer spring is in correctly, the gun fucntions great until the pin works out, somewhere between twenty and thirty rounds.  Either the trigger pin hole is over sized, or the trigger pin is under sized, or a combination of the two.

Do they make larger trigger pins?



I've seen this several times, it's always been the hammer spring.  And yeah, the weapon will usually function right up untill the trigger pin walks out,.

Take it to a gunsmith so he can flip your hammer spring for you, or charge you for a bunch of crap thjat you don't need.


+1 Just what he said.  You don't need anything else like the KNS pins.  Just double check your hammer spring.


You were right, my hammer spring was in backwards.  I feel like an idiot.

thanks again for the input.

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