Firing Pin Spring

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14 years 1 week ago #6095 by nezrongero
Firing Pin Spring was created by nezrongero
Is the firing pin spring from Armalite the right spring rate or is it too stiff? Reason I am asking, the firing pin dents on the primers in the spent cases are barely there.

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14 years 1 week ago #6100 by mrraley
Replied by mrraley on topic Re:Firing Pin Spring
As you have noticed, the dent in the spent casings is barely there. Key word "spent".

It doesn't take much on the AR-10 since the weight of the firing pin is a little heavier, so the firing pin spring is there to help prevent a ND or AD.

If for some reason you think that there should be a more prominent dent, check your hammer spring to ensure that it is in properly and adjust if needed.

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14 years 1 week ago #6102 by nezrongero
Replied by nezrongero on topic Re:Firing Pin Spring
Thank you.

I am comparing the dents on spent cases between my M1As and the AR10s.

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14 years 1 week ago - 14 years 1 week ago #6115 by BUILDING MY SASS
I will have to look at my cases, spent that is :lol:, can you post a picture of one of them....I would like to see to compare...
Question as well....any issues with rounds not firing....
something to check along the lines that Mrraley posted...check which notch you spring is on on the trigger..mine is on the middle one...and I have had no issues...
BMS
Last edit: 14 years 1 week ago by BUILDING MY SASS.

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14 years 1 week ago #6123 by nezrongero
Replied by nezrongero on topic Re:Firing Pin Spring
BUILDING MY SASS wrote:

I will have to look at my cases, spent that is :lol:, can you post a picture of one of them....I would like to see to compare...


Picture of spent cases, you can guess which one came from the M1A and which one came from the AR10. I pulled the 173s out and seated 175 Bergers, keeping the original charge.

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14 years 1 week ago #6124 by mrraley
Replied by mrraley on topic Re:Firing Pin Spring
The one on the left I take it is fron the M1A.

If it is, then ou may want to check the fireing pin protrusion. It seems to look like it's actually hitting the primer so hard that it is denting them inward. The one from the AR-10 is still flush.

Either way, they both fired, no other problems have come out of this...

Not trying to be rude here, but if it's not broke, don't fix it.

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14 years 1 week ago #6129 by BUILDING MY SASS
The one on the right is about how mine looks...I don't see a problem...and as MrRaley said....not to be rude....I think you need to look at your M1...the firing pin does not have to punch the primer in....just hit it enough to fire the primer and the round...if you still have concerns...call the office...ArmaLite or email Tim...and ask for the length of the standard AR-10 firing pin for you model and check it against yours....that way you will know...
and I have to back up MrRaley....on the don't fix it part....you start trying to mess with it when it's not broke...MURPHY'S LAW...is going to bite you in the but....and you will have a problem...until it gives you problems...LET IT BE... ;)
Just my $1.00 worth...
Just thought of something....The M1A is designed for Military rounds...which usually have the harder primers....so the extra force in the pin may be needed....just a thought...
grasping at a straw.. :dry:
BMS

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14 years 5 days ago #6199 by madcratebuilder
Firing pin protrusion for the M1A/M14 is .044 to .060, min/max. I would assume that the AR10 is the same as it uses the same ammo.

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14 years 4 days ago - 14 years 4 days ago #6219 by Ghost_Rider
Replied by Ghost_Rider on topic Re:Firing Pin Spring
BUILDING MY SASS wrote:

I will have to look at my cases, spent that is :lol:, can you post a picture of one of them....I would like to see to compare...
Question as well....any issues with rounds not firing....
something to check along the lines that Mrraley posted...check which notch you spring is on on the trigger..mine is on the middle one...and I have had no issues...
BMS


:) No disrespect or ill intent intended, the notches on the trigger disconnector will have no influence on the pressure of the hammer hitting the firing pin. That adjustment is for the trigger pull weight. The hammer spring controls hammer force hitting the firing pin. see technical note #78

Blue Skies :cheer:
Last edit: 14 years 4 days ago by Ghost_Rider.

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14 years 2 days ago #6225 by BUILDING MY SASS
Ghost_Rider wrote:

BUILDING MY SASS wrote:

I will have to look at my cases, spent that is :lol:, can you post a picture of one of them....I would like to see to compare...
Question as well....any issues with rounds not firing....
something to check along the lines that Mrraley posted...check which notch you spring is on on the ..mine is on the middle one...and I have had no issues...
BMS


:) No disrespect or ill intent intended, the notches on the disconnector will have no influence on the pressure of the hammer hitting the firing pin. That adjustment is for the pull weight. The hammer spring controls hammer force hitting the firing pin. see technical note #78

Blue Skies :cheer:


None Taken. B) ....and I know. ;) ...but never the less....weirder things have happened or been the issues....sometimes the inspection of something that shouldn't be the problem can lead to seeing what maybe,,,,especially in that tight of area...but still...It was a Straw... :dry:
BMS

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