SIG P320
Zoom the image with the mouse

SIG P320

(63 reviews) Write a Review
Size Chart

Related Products


If holster wear/durability is a concern then we highly recommend going with our Black Nitride as Cerakote is a wearable item. 

Cerakote and Black Nitride are for the entire slide. (Black Nitride adds 2-3 weeks lead time) 

For Cerakote color codes and examples:

It is implied that the customer will have arrangements for coating of a slide if NONE is selected for color. If NONE is chosen there is potentially an issue for rust and corrosion to develop on the slide. Jagerwerks is not responsible for misuse and neglect of bare metal.

Trijicon RMR cut with front posts. You are able to use Trijicon supplied RMR screws. Cut at .125" 

Sig Romeo 1 Pro does not have recoil posts*

We do not charge extra for disassembly/reassembly, if you send your entire slide assembly we will laser align the sights for you.

If you include new sights we will install the new ones at no charge. If you include your RMR we will align it at no charge.

A Sig rear dovetail will be milled for the rear iron sight. 

Some of the older model 320's have a deep channel cut underneath/rear section of the slide. We cannot mill these for optics (see photo) 

On the newer 4.7" models we cannot mill top front serrations due to the deep pocket cut on the front of the slide. We can still mill a top front window. (see photo)

63 Reviews

  • P320 Optic Mount

    Posted by Arthur Search on Jan 4th 2022

    I chose Jagerwerks because they were the only company I could find offering mounting for Holosun optics. Excellent work. They also did a cut-out in the top of the slide and installed taller set of iron sights. Only complaint is it took a few weeks longer than advertised (I opted for the nitride coating) but otherwise extremely satisfied.

  • P320 Slide

    Posted by Aidan ODonnell on Nov 18th 2021

    Amazing work. This is the second slide I’ve had Jagerwerks do and couldn’t be more happy with the product. Great people.

  • Great work

    Posted by Dan Minervini on Jun 8th 2021

    Turnaround was as advertised, and the milling and intruding of my slide were excellent. Thanks!

  • Excellent work

    Posted by Jeremy Sylvis on Apr 19th 2021

    I had Jagerwerks mill a P320F slide for an RMR and for serrations. The wait was long but the work was absolutely fantastic - RMR was zeroed as expected and is holding well.

    5/5 would have Jagerwerks do firearm work again.

Write a Review

Shipping & Returns


Please ship to our address 

JagerWerks Eng LLC 

111 D ave East 

Kalamazoo MI, 49009 

When you place an order, we will estimate shipping and delivery dates for you based on the availability of your items and the shipping options you choose. Depending on the shipping provider you choose, shipping date estimates may appear on the shipping quotes page.

Please also note that the shipping rates for many items we sell are weight-based. The weight of any such item can be found on its detail page. To reflect the policies of the shipping companies we use, all weights will be rounded up to the next full pound.

 Shipping Insurance and Signature Confirmation

When shipping slides for milling, SHIP SLIDES ONLY. Do NOT ship the lower of the firearm as we are not transferring the firearm. We only custom mill slides.

Returns Policy

You may return most new, unopened items within 30 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.).

You should expect to receive your refund within four weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days).

If you need to return an item, please Contact Us with your order number and details about the product you would like to return. We will respond quickly with instructions for how to return items from your order.