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 SIG Sauer OEM 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 SIG 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 (SIG, 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 necessary. Lead time can be up to 2 weeks, but is often less.

We will reply to your order confirmation with shipping instructions. We are a licensed firearms manufacturer and can receive and return firearms directly to customers' residence address only. 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 such as the forward-set Apex trigger bar. Factory SIG trigger bar must be used. 

Shipping charges cover return shipping only, signature is required upon return. When shipping please do not include cases, manuals, slides, optics, etc. unless specifically necessary for other services.

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.

28 Reviews Hide Reviews Show Reviews

  • 5
    manual safety

    Posted by jack on May 31st 2021

    Excellent service from the first moment. Answered all my questions up front, very knowledgeable. Texas to Tennessee and back in less than 2 weeks. Highly recommend.

  • 5

    Posted by F. Pinion on Apr 5th 2021

    Works great. Nice job.

  • 5
    Sig P320 Manual Safety conversion

    Posted by Shawn Hughes on Mar 30th 2021

    I sent along my standard P320 FCU along with a newly acquired TGX grip module to AB for the manual safety conversion. They expertly cut the FCU and installed the ambi safety lever just like the M17 has as well as perfectly cutting the TXG grip module. While the FCU was apart, I asked them to install a new APEX trigger, which they did for no additional charge above the cost of the trigger itself. Turn-around was fast; about one week including shipping both ways. I found them to be very easy to work with and will definitely use them for gunsmith services again.

  • 5
    P320 Manual Safety Conversion

    Posted by Donald Parsons on Mar 25th 2021

    Fantastic job. Very professional. Too bad Sig wasn't smart enough to do this on their own. Great job. I really like it.

  • 5
    Manual safety on Sig P320

    Posted by Paul on Mar 25th 2021

    Wanted a manual safety for my P320 with lima laser grip module. This is the best way to get it done. Professional and great service and fast turn around. I had questions and the guys answered all of them with a phone call. Check these guys out and you want be disappointed.

  • 5
    P320 safety install

    Posted by Randal Ott on Mar 22nd 2021

    AB installed the safety kit on my 320 subcompact and it looks like it came from the Sig factory. Works great! If you need this service I highly recommend them. Took only 7 days from time I shipped til time I had it back.

  • 5

    Posted by Unknown on Mar 17th 2021

    Love the conversion. Very smooth when I switch the safety. Lightning process, only took 1 week to finish the whole thing including shipping!

  • 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.