Light Primer Strikes on AR?

[Medic!]

I was just looking at my Colt 6920 and noticed.

Your hammer spring has three coils on both sides of the hammer.

My Colt has four.

Don't know who made your spring. But could it be under powered?

Mine is top picture.
Yours is the lower picture.

 

[Vanillagerrilla]

My trigger and springs are Brimstone Gunsmithing custom.
I don't think it's the hammer spring, but the only way to be sure is to run it a bit. Not sure when I will have time ...

 

[Medic!]

I'm not sure if this is what you have.

But Brimstone Gunsmithing offers JP lightweight 3lb.springs. Vs 5lb. springs.
And they warn about potential light strike problems with these springs on there site.




Edit: I just went to Midway and looked at the springs they offer.
It sure looks like there three coil springs are 3.5 pound spring?

Good luck!

 

[oli700]

yeah dude, your simply not getting into battery every time with that carbon

 

[Velzey]

That's a lightweight jp hammer spring..
Sometimes they don't last long at all!

Gunsprings.com and get yourself a few sets of standard springs!

 

[Vanillagerrilla]

Well , I may have a mil spec spring here somewhere...
How about wolf springs ?
I built this one for 3Gun and I like the light pull, but not at the expense of misfire

 

[Vanillagerrilla]

they are cool, my buddy won a trigger from them at an event in Bend.
I cant see spending the money on it though.
i think a new hammer spring is $10
trigger spring should be fine...

 

[oli700]

I would bet its not the spring.......don't do the spring quite yet or you will never know what was causing the problem

cant wait to see

 

[Medic!]

I would bet its not the spring.......don't do the spring quite yet or you will never know what was causing the problem

cant wait to see

Why?

Manufacturer and seller of the spring warns of soft strike problems with this 3.5lb. spring?

It is a problem!

Why chase your tail?

 

[HappyRoman]

I am not a betting man (LOL) but after a good cleaning (dis-assembly of the trigger group) and a cleaning of the bolt carrier group, complete checking the firing pin to see if a new one is any longer at all, even 2-or 3 .oo1 could solve the problem.

I have several new firing pins in stock incase I have a problem, would be glad to see if it helps, or you can buy one. A new trigger group and or springs probably are not the problem... just my .002c

 

[oli700]

Why?

Manufacturer and seller of the spring warns of soft strike problems with this 3.5lb. spring?

It is a problem!

Why chase your tail?

because I have seen the problem, I am just betting its not the spring.....I have lost plenty of bets and am not afraid to be wrong, that's why

chasing tail ?

its process of elimination

have the spring on stand by , do one thing at a time

what's the big deal?

 

[Medic!]

because I have seen the problem, I am just betting its not the spring.....I have lost plenty of bets and am not afraid to be wrong, that's why

chasing tail ?

its process of elimination

have the spring on stand by , do one thing at a time

what's the big deal?

That's cool. What is it then?

 

[oli700]

yeah dude, your simply not getting into battery every time with that carbon

That's cool. What is it then?

I don't know.....I think its the hammer spring

 

[Medic!]

I don't know.....I think its the hammer spring

Wait?

Is that not what I suggested be changed?

Then what's the problem!

 

[Vanillagerrilla]

I am woefully low on spare parts for this rifle.
Springs and pins are a must to have on hand for any gun that sees alot of action, but yes I will run it a bit to see if the cause was the massive build up of crud .
If its still not cycling after a more detailed cleaning, then a set of springs seems reasonable.

 

[Vanillagerrilla]

Is there any where local that sells small parts ?
I dont feel like spending $7 shipping for a $2 spring.

 

[oli700]

Wait?

Is that not what I suggested be changed?

Then what's the problem!

I'm just being a smart a$$

I believe he is suffering from a tolerance stack attributed to the carbon and crap in the bolt body

I think it is too intermittent to be the spring because he is using only one ammo type and its quality ammo , regular primer cups and all

I could be totally wrong but its fun trying to diagnose without the gun in hand

 

[Medic!]

I am woefully low on spare parts for this rifle.
Springs and pins are a must to have on hand for any gun that sees alot of action, but yes I will run it a bit to see if the cause was the massive build up of crud .
If its still not cycling after a more detailed cleaning, then a set of springs seems reasonable.

Contrary to common belief.
A mill speck M-16 can shoot 2000nrounds or more without cleaning.

I have done this more than once in the Military [There was no time to clean].

Your gun is only touching on filthy. Compared to what I have seen keep running in a mil speck. gun.

So it's not performing in it's current confiruration?

 

[Vanillagerrilla]

It was running fine, but then the light strikes became a problem. Since they are intermittent , im leaning towards the unholy filth that was built up in the chamber as the culprit.
However, spare parts are critical for any weapon platform, so yeah I will pick up some fresh springs and an extra firing pin.
Tonight im going to swing by sportsmans and pick up some new oil and scrubber and new brushes.
Then turn my kids loose on it and tell them I want it gleaming if they ever hope to shoot it again.

 

[oli700]

Places like Sportsman's carry DPMS and Bushmaster spare/lost part kits but I don't think you can get just a spring unless you get lucky at a LGS, online for sure but like you said shipping sucks