SIG P320
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SIG P320

(63 reviews) Write a Review
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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. 

If there is a factory plate system with integrated rear sight, we cannot mill a new rear dovetail.

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 w/ Holosun Series

    Posted by Shane on Sep 26th 2022

    Honestly the best work I've ever seen. Also better than getting an RXP slide from Sig

  • Very pleased

    Posted by John Cuyle on Apr 20th 2022

    Haven't mounted and shot the optic yet but despite accommodating a change after I sent it in, the slide milling was done much faster than promised and looks fantastic. Top serrations look great, I like the window, race cut is very cool and gonna keep my SRO's from getting banged up as fast as it would with an off the shelf co-witness setup, nitride is inky black, and they even returned the slide in the same plastic Brownell's slide tube I sent it in.

  • Good discount, quick turnaround, great work

    Posted by Josh on Mar 16th 2022

    I managed to get a Holosun cut and nitriding job for $100 for black friday. I sent in my slide after the holidays, and received my slide back about 10 weeks later, pretty decent turnaround. The work looks great. I haven't been to the range yet, but I have no doubt everything will be solid and perform very well, now it's just up to me to practice and make regular range-time. Thanks JW!

  • Quality

    Posted by Paul on Feb 3rd 2022

    Back just under 8 weeks and everything looks great.

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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.