P320 Manual Safety Conversion

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Manual Safety Conversion for a SIG P320 or 80% P320 Frame (Post-Upgrade Only)


This is a Service to convert an existing SIG P320 to manual safety. This includes the manual safety parts and grip cut, as required. We can cut factory frames or 80% frames. 

Perfect for your EDC P320 or competition!

We precision cut the manual safety pocket in any P320 frame (FCU) in 9mm, 40S&W, 357SIG or 45ACP to exact SIG Sauer specifications. Each frame is tested for fit and function.

The manual safety parts are exchanged for your existing SIG non-manual safety FCU parts. Grip is cut as required. No additional holes are cut or drilled!

Includes:  CNC cut your frame for the P320 Manual Safety Lever. Exchange non-safety parts with manual safety parts. Cut polymer SIG P320 grip (factory, Wilson Combat, Polymer 80 and other grips ok). Function test. Please add a P320 frame or 80% frame and FCU parts kit to your order if you haven't already. Lead time can be up to 2 weeks, but is often less.

Please contact us before shipping your frame (We are a licensed Firearms Dealer). All completed frames must have a serial number and must be accompanied by a copy of valid state-issued driver's license or ID card (no PO Boxes for return address). You must include the FACTORY SIG non-safety FCU parts for exchange. Conversion will not work with aftermarket trigger bars. Factory SIG trigger bar must be used. 

Return shipping charge is included, signature is required upon return.

FCU Parts, Barrel, Slide, Grip, Magazines, etc. are obviously NOT INCLUDED.

PLEASE NOTE: AB Prototype modifications to your frame are not authorized by SIG Sauer or JSD Supply. Any modifications to these frames will most likely void any existing manufacturer warranty. AB Prototype does not provide any additional warranty, neither expressed nor implied. We only guarantee fit and function of the manual safety lever on completed frames.

21 Reviews Hide Reviews Show Reviews

  • 5
    Manual Safety Conversion Sig P320

    Posted by Tony Palumbo on Dec 22nd 2020

    Alex was fantastic. Responsive to my pre order questions was exceptional. Turnaround was less than 10 days (door-to-door). And the work was outstanding; fit and function is impeccable. Highly recommend AB Prototype and Alex.

  • 5
    P320 Manual Safety

    Posted by Curt Clark on Dec 20th 2020

    I couldn't be happier with my new safety. It looks like it came from the manufacturer. I got my frame back in 8 days. You just can't beat that.

  • 5
    Excellent Work

    Posted by Ryan on Dec 7th 2020

    Unfortunately the p320 has an inherent design flaw that makes carrying chambered dangerous. I am not referring to the drop issues but rather how easily the internal safeties are disengaged with the slightest of trigger movement. Many situations can cause this to occur and issues can arise from this. This is why other striker fired pistols have trigger or grip safeties. The only safe bet for a p320 (other then carried without a round chambered) is a manual safety but this modification is not offered by SIG. Oh well, I would rather void my warranty then risk potential tragedy. Alex’s work is clean and was done quickly. I am very pleased with the results of his work on my firearm and highly recommend all p320 users have a manual safety on their firearm.

  • 5
    P320 manual safety conversion

    Posted by Richard Hughes on Nov 17th 2020

    This is the second one that Alex has done for me and I am just thrilled with it. Before I had this done to my 2P320 compacts I was afraid to load the guns except at the shooting range because they both had a 4 pound trigger pull and I was a captain in the Marine Corps and have been shooting for almost 70 years so it is not like I was an inexperienced shooter. This I feel makes them much safer and it only takes a fraction of a second to flick off the safety.

  • 5
    P320 manual safety conversion

    Posted by Richard Hughes on Nov 2nd 2020

    As an old marine who always carried a 45 with a safety in places like Viet Nam I had to have a safety on my P320 and I couldn't be happier with the results. It is absolutely perfect probably because it was designed by the US Military who wanted their people to be safe and ready for action in a nano second. Alex at AB Prototype did a superb job on the conversion and it looks like it was done at the factory. I like it so well that I just sent my other P320 compact to AB Prototype for the conversion.

  • 5
    P320 Manual Safety

    Posted by mark fitzgerald on Sep 2nd 2020

    After reading about the drop tests and accidental discharge issues with the original P320, even though I had the fixed version, I still wanted to make sure I wasn't going to have any issues with a weapon that would be carried daily. I could have purchased a different pistol, however I found Alex and AB Prototype. The positive reviews convinced me, and so I sent my sig from NY to CA for retrofitting. Alex was great, and we had some initial delivery issues due to my FFL messing up the transfer address, but we got it sorted. Throughout the process, Alex was on top of it and kept me updated. The conversion was done in less than a week, and I had my P320 back. The work looks factory, and the safety feels great. It engages and disengages solidly, and gives me a little more peace of mind when I am carrying. Great work! No hesitation in recommending AB Prototype to anyone looking for similar services.

  • 5
    Just what l ordered

    Posted by Steven Foster on Sep 2nd 2020

    Wanted to add the manual safety to my X5 Legion. All my other handguns have them. They did a great job at installing the manual safety. Supplied the replacement parts and all. Absolutely "Zero" complaints about AB and the service.

  • 5
    Sig 320 safety conversion

    Posted by David Slane on Aug 18th 2020

    This company is first class... they communicate very well and the work done was fast and of very high quality. I wish they would move to a more gun friendly state! Missouri would welcome them with open arms.

    AB Prototype Reply - Thank you!!!

  • 5
    Manuel Safety Installation Sig Sauer P320

    Posted by Mike D. on Aug 15th 2020

    The Manuel safety appears and functions just as if it were installed at the factory by Sig. According to Alex, the owner, he uses all new parts that he obtains from Sig Sauer. I was told the work would take 1-2 weeks and it was completed in 1 week. I am very pleased with the results and with Abprototype. Highly Recommended.