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Desert_AIP
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Posted: 2/5/2008 10:05:12 PM
[Last Edit: 2/5/2008 10:33:41 PM by Desert_AIP]
There have been several questions in threads recently asking about the need for buying the $15 front pivot pin install tool to install the Pivot Pin.
If you are only doing one build, it's hard to justify spending money on a single use tool, if you're building 100 the technique below works equally well.
Many here have talked about using a 1/4" clevis pin to install the Pivot Pin but there are always follow up questions as to the technique.
Below is a step by step procedure to install the Pivot Pin using a clevis pin, this takes 10 times longer to describe than to actually perform and costs nearly nothing.

Got to your local hardware store and buy a 1/4" clevis pin. Get the kind with at least one hole through it not the kind with a captured ball bearing on the end.
I use a 2" long pin which reaches completely across the front of the lower. Get one at least this long. I paid 65¢ for mine.


Insert the clevis pin through the pivot pin holes in the front of the lower from the left side.
Align the hole (or one of the holes) in the clevis pin with the pivot pin detent channel in the lower.


Insert the pivot pin detent spring through the hole and into the channel in the lower.


Insert the pivot pin detent through the hole. The spring will not let it go in very far without pressure.


I perform the next three steps inside a 2 gallon zip-loc bag so I don't lose the detent or spring in case it gets away from me.

With a punch or other suitable tool (like an allen wrench) push the detent through the hole in the clevis pin and into the lower while compressing the spring. The detent and spring are now inside the lower and clear of the clevis pin. The only thing holding them in place is pressure on the punch.


Turn the punch or allen wrench 90 degrees counter-clockwise so the hole is now at the top of the clevis pin. This will capture the detent and spring along the side of the clevis pin.


Remove the punch. You can see the detent poking out of the hole.


Start the pivot pin into the lower from the right side. Make sure the groove in the pivot pin is at the top.


As you push the clevis pin out of the hole, keep sideways pressure on the detent until it is captured by the pivot pin.


Keep pushing the pivot pin though the right side pivot hole. Once it is in the hole and won't fly out under spring pressure, remove the clevis pin.


Rotate the pivot pin 90 degrees counter-clockwise until the groove in the pivot pin captures the detent.


You are finished!


The things that will destroy America are prosperity-at-any-price, peace-at-any-price,
safety first instead of duty first, the love of soft living, and the get-rich-quick theory of life
-Theodore Roosevelt
MMcfpd
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Posted: 2/5/2008 10:19:27 PM
[Last Edit: 2/5/2008 10:20:52 PM by MMcfpd]
That makes me want to get another stripped lower.




ETA - BTW, whose lower?
CAR_16
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Posted: 2/5/2008 10:22:44 PM

Originally Posted By MMcfpd:
That makes me want to get another stripped lower.




ETA - BTW, whose lower?


And what caliber?
Alright you primitive screw-heads, listen up. See this? This is my boomstick!
bdawg998
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Posted: 2/5/2008 10:24:13 PM
this should be tacked so i can refer to it when i build my soon to be purchased upper and lower.
Desert_AIP
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Posted: 2/5/2008 10:29:34 PM
[Last Edit: 2/5/2008 10:54:04 PM by Desert_AIP]

Originally Posted By CAR_16:

Originally Posted By MMcfpd:
That makes me want to get another stripped lower.




ETA - BTW, whose lower?


And what caliber?


CNC Guns/TANGOCHASER/Khalan - AR45 in 45 ACP
CNC Guns AR45

Happened to be to last stripped one I had
The things that will destroy America are prosperity-at-any-price, peace-at-any-price,
safety first instead of duty first, the love of soft living, and the get-rich-quick theory of life
-Theodore Roosevelt
Ridge_Runner_5
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Posted: 2/5/2008 10:43:17 PM
Ive read a few how tos on installing that pivot pin, and I guess there is alot of trouble keeping the spring and detent from flying away and whatnot...I seriously did not have a single issue with my build, except for getting the trigger guard pin through...and the only tools I had were a sledge hammer (light taps only, mind you) and a PC screwdriver set...
chris65
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Posted: 2/9/2008 9:56:40 AM
Bump for a great photo-write-up.
2ridgebacks
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Posted: 2/9/2008 10:09:46 AM
Great trick! I'll have to put my pocketknife away on future builds.
Some people are not physiologically engineered for survival.
2manytoys
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Posted: 2/9/2008 2:13:19 PM
"If any of you came to get mellow...you can turn around and get the f**k out" - Ted Nugent
anjan9
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Posted: 2/9/2008 2:21:47 PM
I need to add one of these to my toolbox. Thanks for the tip.
exocet
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Posted: 2/9/2008 3:09:36 PM
nice write up !
usagold
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Posted: 2/9/2008 4:30:02 PM
Thats a nice write up with great pics. Job well done
Big-Bore
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Posted: 2/9/2008 4:39:15 PM
EXCELLENT write up. Thank God and man, does this need to be tacked.
If I see one more time about using a razor blade to depress the detent while slipping the pin in and thinking that is a safe and good way to install it I will scream. I don't care if one has done it that way a thousand times, it is foolhardy and yes, you will shoot your eye out eventually or cut yourself.
The clevis pin method is the only way that makes since IMO outside of buying the special tool that works exactly the same way, or the new and expensive tool that Brownells sells.
Great job. Now nobody has any excuse for sending those little pins flying and no need to work in a plastic bag or spread out sheets or work under them.
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KELBEAST
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Posted: 2/9/2008 4:43:30 PM
[Last Edit: 2/9/2008 4:44:23 PM by KELBEAST]
I don't want to be a dink, but I managed to install my front pivot pin/detent without any tools besides needle nosed pliers, and I have a broken wrist, casted to immobilize my elbow and most of my fingers on my dominant hand. I didn't realize these things were supposed to be that hard, or maybe I used the wrong spring? The pivot pin feels like the guns at work so I'm pretty sure I got it right.Edit: That is a pretty trick solution though, I like your creativity!
mogunr1
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Posted: 2/9/2008 6:00:38 PM
Great write-up. Used the exact method on my Mega lower last week. I had to buy 4 clevis pins (packaged that way). But they only cost me $2.50 - not $5 plus shipping.

For those who don't think it necessary for these or other specialty tools; a friend tried to install the pivot pin in an engraved lower for a buddy and ended up scratching it

He had to buy him a new one. Of course he kept the scratched one but learned a costly lesson.
Big-Bore
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Posted: 2/9/2008 8:26:06 PM

Originally Posted By KELBEAST:
I don't want to be a dink, but I managed to install my front pivot pin/detent without any tools besides needle nosed pliers, and I have a broken wrist, casted to immobilize my elbow and most of my fingers on my dominant hand. I didn't realize these things were supposed to be that hard, or maybe I used the wrong spring? The pivot pin feels like the guns at work so I'm pretty sure I got it right.

Edit: That is a pretty trick solution though, I like your creativity!


That is great for you, but did you do it in 30 seconds, because that is all the longer it takes using the clevis pin tool. And, how many have you done?
Do it your way a few more times then tell us how many detents you had to replace. Even a blind pig finds an acorn once in a while.

Why is it that on an excellent post like this some, as you said, Dink, always has to come on to try and throw water on the OP's effort. Note I ended the sentence with a period, not a question mark as this is a rhetorical statement.
Join the N.R.A.
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Jimmmy1111
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Posted: 2/9/2008 8:36:58 PM

Originally Posted By usagold:
Thats a nice write up with great pics. Job well done


+1

raf
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Posted: 2/9/2008 8:59:02 PM
That's a great write-up and no doubt lots of people will find it very useful.

OTOH, I feel a little inadequate for just using a very small screwdriver.
"The M1 Rifle is the greatest battle implement ever devised." General George S. Patton Jr.,US Army
redneck243
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Posted: 2/9/2008 9:27:31 PM
i tryed this and when i pushed the piovt pin in it sliped and bang there goes the detent. i then used a box cutter blade to push the detent and a worked just fine.....just my 2c
CEFPARTS
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Posted: 2/9/2008 9:55:08 PM
Nice write up and good idea. Had to install one of these for the first time the other nite. Ended up using a credit card. Only had one shot though and almost didn't make it. Wes
DDog
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Posted: 2/9/2008 10:16:01 PM
Excellent info! Thanks for the post.
nicholsmf
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Posted: 2/10/2008 12:27:15 AM
Awesome write up
If you're asking if I've ever owned one, the answer is no. However, I don't need to own one to know they are junk. Same principle applies to VD and communism.

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rmyc
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Posted: 2/10/2008 5:53:03 AM
i just used tape, i think it was far more easier.. but sweet write up
J_M_C
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Posted: 2/10/2008 6:43:02 AM
Thanks for taking the time to photograph the install and do the write up. Nice job.

I had just read about the clevis pin somewhere else and bought one the same day at Lowe's for $1 and change and then I read your post that afternoon.
osprey21
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Posted: 2/10/2008 7:18:50 AM
Well done!
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59Bassman
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Posted: 2/10/2008 7:31:27 AM
I used this trick when I built my lower a few months ago. One thing to note is that some pins (mine came from Lowe's) have a burr around the holes. This will scratch the lower. The solution is to chuck it up in a drill and use a bit of sandpaper (or a file) to knock down the burrs. Took about 30 seconds on mine.
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