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Sig P320 Holosun 407c/507c/508t

(5 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.

Our Holosun 407c/507c/508t cut is milled to a depth of .125" which includes front recoil posts and mounting screws. 

Screws supplied are (2) #6-32 IP15. Both are safe to use on the extractor side of the slide. A IP15 is needed for install 

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 Holosun, barrel and recoil spring we will align it for free.

Does not work on the Sig p365/XL


For lower 1/3rd Co-Witness you would need a Sig P320 .325" rear.


For the front sight you would need a Sig P320 .330" front


If you include these iron sights we will install them for free. 





5 Reviews

  • SigP320 .45

    Posted by John Sayler on May 5th 2024

    Just simply great work. When people ask what weapon you have and you mention the P320 in .45 they go--there aren't any parts for that.
    Jager did an outstanding job milling the slide for my Holosun 507. Looks great and the optic sits like it came from Sig.
    If you go to anybody else for slide work--you are crazy.
    I could not ask for better--Thanks Jager

  • Mill/ Nitride

    Posted by Andrew on Jun 27th 2021

    Outstanding work. Had my slide milled and nitrided. I also included my optic and taller irons sights and they were installed perfectly. I will be using Jagerwerks again and highly recommend them.

  • Mill/Nitride

    Posted by Dana Easterly on Feb 2nd 2021

    Overall a quality job. Especially for the price. Wouldn’t hesitate to use again.

  • Awesomeness

    Posted by Justin Rowan on Jan 26th 2021

    The only other slide cut I have ever had done, is the Glock slide I sent in with this Sig P320 slide, fit and finish are awesome on both, from time of receipt to the time I had them back in my hands was well under the max lead time, and this was after the Black Friday sale, I can only imagine how many slides had to be done. Keeping up with Jagerwerks' progress through their Facebook page was fun too, hoping my slides were in the pics! All the reviews and research I did to lead me to Jagerwerks for my slide milling was 100% spot on and I will be recommending them in the future.

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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.