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I bought a p320 compact w/o safety and really like the gun but being raised on 1911's now i am hesitant to carry it. What would be my best option to change it over? Just buy a new pistol with the safety or a stripped fcu w safety? Thanks
 

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I'm not sure if one can be added after the fact. I do know one can purchase an FCU only with the safety. It would be like purchasing another weapon as the weapon is the FCU. I understand the concern about the safety but the 320 is safe. I have both a 365 and 365xl with safeties for the same reason. I also just picked up an M18 with a safety. If you do go MS, then practice with it a lot.
 

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Well, you have a few paths to take.

1. You can send your stripped FCU to ABPrototype and have them machine in the safety cuts. You would still need to source the extra parts.

https://www.abprototype.com/manual-safety-cut/

2. You can buy a stripped FCU with the cut. You would still need to source the extra parts. Note: most places are out of stock. Here's one link. Note: Out of stock (OOS)

https://sigsauerparts.com/sig-sauer-p320-stripped-manual-safety-fcu/

3. You can buy a complete FCU w/Safety Note: most places are OOS.

4. You can buy a complete 320 w/safety and perhaps sell your current one. OR swap parts over to assemble the one you want and sell the rest in parts or as a complete handgun.

I said "most places" as I only looked at a few sites and all are OOS
 

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Adding a thumb safety is abit difficult. You're probably better off trading it for one with a safety.

If safety is your concern, the P320 has an internal striker safety that prevents the striker from releasing unless the trigger is pressed. The gun should be safe as long as you have a good holster that fully covers the trigger guard preventing anything foreign getting in and potentially pulling the trigger.

Alternatively if you want to add more safety, there are after market triggers for the P320 that add a trigger safety.


Also you can always just carry without a round in the chamber so you have that added safety of racking the slide first.

There are options out there if youre having a hard time trading for a thumb safety FCU.
 

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I added a Thumb Safety to my Compact RX.
Cost was about $165.00 through ABPrototype it is less at SigSauerParts.com

To add a Manual Safety to a P320 that does not have one, you need an FCU Frame that has the Manual Safety notch milled into it.
This is Circled in Red in the Picture below.

Sig Sauer MS_FCU_STRIPPED Red Edit.jpg

I purchased a M17 Manual Safety Stripped Frame..$49.99.
They were available at Sig Sauer Parts.com just a day or so ago....They are now Out of Stock.
* You could put in a Notify you when it is back In Stock.

https://sigsauerparts.com/sig-sauer-p320-stripped-manual-safety-fcu-m17-prefix/

Sig Sauer Parts also has the Manual Safety Parts for $94.00
unfortunately it is "Out of Stock"

https://sigsauerparts.com/sig-sauer-p320-manual-safety-parts-kit/

Put the 2 together and the cost is $143.99 + Shipping.

I purchased a punch set at Harbor Freight.

https://www.harborfreight.com/hand-tools/chisels-punches-stamps/punches/8-piece-punch-set-93424.html
----------------------------------------------------------------------------------------------
First I disassembled my Compact RX FCU and set the parts aside.
Then using the video below I assembling my M17 Manual Safety FCU Frame.

Following along with the video I did each Step 1 by 1 pausing the Video as I went along.


Taking my time it went rather well and it took me about 30 minutes.
_______________________________________________________________

I then used the Template in this Video to notch out the Manual Safety Cut into my X-Compact Grip..


Here is the End Result.

P320 X-Compact RX Manual Safety PRO 1AE.jpg P320 X-Compact RX Manual Safety PRO 1B.jpg

And with Wilson Combat Carry MS Grip:

WCG PRO 02.jpg WCG PRO 03.jpg

So there you have it..
Everything that you should need to know to add a Manual Safety to a P320..
 
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