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P250 Slide Assembly Step by Step w/ Photos
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GrumpyBiker Offline
#1 Posted : Sunday, September 11, 2011 10:03:17 AM(UTC)
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With the cleaning done its time to reassemble.



Place the extractor back in the slide.



Assemble the firing pin retention spring and clip in the rear sight




Insert the rear sight assembly in the slide but not all the way.




Ensure the end of the extractor rod is turned so that the longest portion is outboard.



Insert the extactor rod and spring assembly into the slide.




Remember the extractor rod and rear sight had to be removed while the extractor rod was fully depressed.
Reassembly requires that the extractor rod is depressed past the indention shown here.




The rear sight can then be fully seated.



Roll the slide over to insert the firing pin and spring.



When inserting the firing pin be sure to rotate the pin so that the roll pin indention is facing the retention clip.



With a punch in each hand depress the retention clip fully while pressing the firing pin all the way in.
Then release preassure on the retention clip.
The retention clip also prevents the firing pin from making contact with the primer unless it is depressed.
This is part of what makes this a "drop safe" weapon.




Insert the roll pin from the top and tap it until its seated. If it doesn't seat easily, depress rhe firing pin while seating the roll pin.




No part of it should protrude through the bottom.




And you're done! Why cant they all be this easy?

" He's a Mean Motor Scooter & A Bad Go Getter..."



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EASHER1968 on 9/11/2011(UTC), Pmeador on 12/15/2011(UTC), XavierNu on 4/19/2013(UTC), ETI-K on 7/16/2013(UTC), Wrangler06 on 7/22/2016(UTC)
male2205 Offline
#2 Posted : Sunday, September 11, 2011 10:10:23 AM(UTC)
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even better than the previous one....!
M&P 9C
Sig Sauer P250 C 9mm FDE T/B
EAA Tanfoglio Witness Classic .40 L

"I know not with what weapons World War III will be fought, but world War IV will be fought with sticks and stones." A Einstein
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GrumpyBiker Offline
#3 Posted : Sunday, September 11, 2011 10:26:07 AM(UTC)
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As before, if I got the nomenclature of any of the parts wrong...and I may have,
Send me a PM and I'll correct it in the post.
" He's a Mean Motor Scooter & A Bad Go Getter..."



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lafayettela Offline
#4 Posted : Sunday, September 11, 2011 7:51:35 PM(UTC)
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Thank you sir!!
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JeffCooper Offline
#5 Posted : Sunday, September 25, 2011 8:34:34 PM(UTC)
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Thanks Grumpy - saved my bacon! I have about 15 mins to get the parts out of my slide for polishing. Your documentation rocks!
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JeffCooper Offline
#6 Posted : Tuesday, September 27, 2011 9:33:28 PM(UTC)
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Hey there Grumpy!

So I took my .45 apart for polishing. All the way apart. By the time I was done, it had been few weeks. The memory fades.

When I was putting my FCU back together (thanks to your post, by the way), I ended up with something left over. Never a good sign.

It's a little black washer - it almost looks like an o-ring. I'm 99.99% positive it came from the FCU, but I'm not seeing it in the parts diagram in the manual or in your pics. Any idea?

Also - I put the ejector in, put sight back in the slide, slipped in the firing pin, lined up the notch in the pin per your instructions, and started to tap in the roll pin. It goes in half way, and stops. I remove it and look in the hole and notice that it's partially blocked, and that as I push on the firing pin, the hole opens.

Not to be stopped, I hold in the firing pin while I tap on the roll pin... it still doesn't go, and seems to wedge the firing pin... the pin won't move.

I'm all messed up Grumpy - what am I doing wrong? Where'd that o-ring thingie come from?
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GrumpyBiker Offline
#7 Posted : Thursday, September 29, 2011 7:00:34 AM(UTC)
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Do you have a pic of it?
Next to the FCU for compairson?!?!
Tysonsvt just had his apart, it'd be freshest in his memory!
" He's a Mean Motor Scooter & A Bad Go Getter..."



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JeffCooper Offline
#8 Posted : Thursday, September 29, 2011 6:51:30 PM(UTC)
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Greetings!

TysonSVT? As in Special Vehicle Team? I've got an 03 Cobra. I think we'll need to catch up.
But back to the issues:

The big one is the inabililty to drive in the roll pin as pictured. Do I have to depress the firing pin a little to get it to go? I've got the relief facing the right way. The pin goes about halfway in and hits the firing pin. Not good. If I press the firing pin a little I think it will go, but hammering on a weapon freaks me out. Man this pic was hard to get...I can SEE the firing pin's relief moving out of the way. Can you see where the pin is obstructing the hole? When I try to drive the roll pin in and push in on the firing pin it binds up and I'm afraid I'll jack something up.





Here's the little washer and the FCU from different angles. I don't see ANYWHERE where this would go, so maybe I'm disillusioned.








What do you think? I'm more worried about the roll pin than anything. The pistol seems to function just fine, as far as cocking, dry firing, etc... I need help!
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GrumpyBiker Offline
#9 Posted : Thursday, September 29, 2011 7:19:27 PM(UTC)
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The firing pin has to be depressed while inserting the roll pin.

Is that the o-ring that should be between the slide lock lever and the spring?
Its the only place that has an object like that on the FCU.


" He's a Mean Motor Scooter & A Bad Go Getter..."



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JeffCooper Offline
#10 Posted : Thursday, September 29, 2011 7:35:18 PM(UTC)
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Bless you and all hail to the harley ridin' guy!

I was just worried, because that roll pin came out HARD, and didn't want to go back in. I'll take a sledge to it.
I'll look at that slide lock lever and see if she goes there. Stay tuned!

Interestingly, I just got new spring and "bucket" for that spot.
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Sal1911a1 Offline
#11 Posted : Thursday, September 29, 2011 8:08:32 PM(UTC)
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10-4 grumpy
It looks like from the old slide stop set up, The new one does not have that washer.
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GrumpyBiker Offline
#12 Posted : Friday, September 30, 2011 6:19:04 AM(UTC)
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Looks like yours may have become detached!


" He's a Mean Motor Scooter & A Bad Go Getter..."



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JeffCooper Offline
#13 Posted : Friday, September 30, 2011 9:33:49 AM(UTC)
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I got it all back together...
need to go to the range and pop off a few to make sure it all works, but the washer went right in, and after depressing the firing pit the roll pin went in as well. Grumpy - your documentation is perfect, but you might modify to mention the firing pin - for driving the pin out and back in.

Thank you ALL for getting me back in action!
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GrumpyBiker Offline
#14 Posted : Friday, September 30, 2011 10:28:40 AM(UTC)
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I didnt have that issue but the OP has been amended!
Glad your back up & running!
" He's a Mean Motor Scooter & A Bad Go Getter..."



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JeffCooper on 9/30/2011(UTC)
GrumpyBiker Offline
#15 Posted : Thursday, April 18, 2013 11:56:10 AM(UTC)
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BTT for our newer members.
" He's a Mean Motor Scooter & A Bad Go Getter..."



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ETI-K Offline
#16 Posted : Sunday, July 07, 2013 1:32:07 PM(UTC)
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update, I finally got it in, all it took was a little more gumption.

Do all FCU's have the little washer under the trigger bar spring? I took mine apart recently and I wasn't read for the spring so it sort of exploded out, and I never noticed a washer when putting it back together.

Also, very nice step to step instructions. Getting the firing pin back in was the trickiest part, it definitely takes some patience and skill.
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