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Old 02-28-2013, 06:28   #1
iontrap
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.22lr trigger

I've been reading that .22lr puts considerable stress on the hammer because it is blowback operated. So, what are my options if I have no more than $100 to spend?
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Old 02-28-2013, 07:06   #2
Travclem
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Standard LPK? What is your intended purpose?

IMO a blow back .22 shouldn't fatigue a hammer anymore than a locked 5.56. I cant see the forces being any greater, but I have been wrong once before.
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Old 02-28-2013, 07:07   #3
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I've never heard that before, nor have I experienced it.
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Old 02-28-2013, 19:38   #4
Cole125
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I have never heard that before, but it's possible.

I just have a standard RRA lower powers kit in my dedicated .22 build(CMMG upper) and it works perfectly.

If my hammer gets worn out or broken, I'll just replace it, not a big deal.
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Old 03-01-2013, 01:31   #5
HAIL CAESAR
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Don't use KNS pins and you'll be fine.
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Old 03-01-2013, 09:01   #6
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Hmmmmmmm, interesting.

Most 9mm and .22lr owners recommend KNS pins for the blowback
action ARs. I've been using KNS pins in a BCM lower with a Spikes
.22lr upper for three years. My 9mm build got KNS pins as well.

Your lower, your $30........take a look on ARFcom, many, many using them.
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Old 03-01-2013, 23:43   #7
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The only difference I know of is NOT to use a "notched" hammer
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Old 03-01-2013, 23:53   #8
HAIL CAESAR
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The only .22 and 9mm pins I have seen broken were KNS pins. We put in regular pins (
Or the ones that Geiselle come with) and never had an issue again.

All these guns actually had higher round counts through them. They were not Internet pic posting guns.
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Old 03-02-2013, 06:13   #9
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Hmmmmm, kinda sounds like a dig there Ceasar, did not expect that from you.
What was the "higher round count" of these "not Internet pic posting guns"

My BCM/Spikes has right at 8500 rounds fired on the KNS pins
The 9mm is a relatively new build with 450 rounds fired.

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Old 03-02-2013, 06:21   #10
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No sir, not meant to be a dig on anybody on this discussion. Promise.

But a lot of the folks posting pics of guns they haven't shot yet much at all.... Them say how reliable the gun (parts) are.

Guns in .22LR had 3k to 5k.

9mm I don't know exact, but had been shot a bunch (for what it is).... Probably 3++ k.

If I remember right Geiselle himself says to stay away from KNS for blowback.
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Old 03-02-2013, 06:45   #11
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Just screwing with ya,........you should know I have the utmost
respect for you!

Wow,....of that came from Geiselle, sounds like I need some new
pins before I end up with an issue.
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Old 03-02-2013, 06:48   #12
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He didn't much like for you to use them with his triggers in any caliber......but have a big hell no for blow back.
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Old 03-02-2013, 06:52   #13
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I just fired off an e-mail to them.
Thanks,.........
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Old 03-02-2013, 07:15   #14
HAIL CAESAR
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If anything changed let me know.
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Old 03-02-2013, 08:35   #15
iontrap
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I'll grab a standard LPK, hopefully soon, and get this build started.
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Old 03-04-2013, 18:08   #16
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Quote:
Originally Posted by HAIL CAESAR View Post
If anything changed let me know.
Talked to the folks at Geissele,......they sell their pins.
$9 each,.....talked with a few shooters I know, they do not recommend
KNS pins. They state they are an equivelent of a Grade 2 fastener.
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Old 03-05-2013, 01:54   #17
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Don't know if it is an issue with ALL .22 kits, or just the ones the USAF used in the early/mid 80s, but we used to break hammer pins with great regularity (of 50 training M16/M16A1 rifles, appx 30 used per class in a rotation, 4-5 classes a week, I was replacing a broken hammer pin every week or two; minimum, 2 per month).

I don't think I ever saw a hammer pin break when shooting 5.56mm (same weapons, and later on, other weapons at other bases), even full-auto. Hammer springs, yes; pins, no.
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Old 03-05-2013, 07:28   #18
KalashniKEV
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I recommend KNS pins for 9mm ARs.

A standard hammer pin will snap in short order... that is, if you train absolutely balls-to-the wall like I do.

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Old 03-05-2013, 07:54   #19
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I did have a DPMS hammer pin break. That was when I was using a
non-ramped RRA bolt.
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