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Sig P365 Holosun K Series

(15 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.

Screws supplied are (2) #6-32 IP15. Both are safe to use on the extractor side of the slide. An 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 K series, barrel and recoil spring we will align it for free

Holosun K Series - #6-32 x 7/16" IP15



Iron Sights:
 is a great option for a lower 1/3rd co-witness. If you include these with your slide we will install them for free. 


15 Reviews

  • Sig 365 Holosun 365K Series

    Posted by Stephen Cupp on Oct 27th 2021

    Lead time duration a bit longer than originally anticipated because Jagerwerks is being flooded with orders, however, as promised my patiece was rewarded with an outstanding end product!!!

  • Optic Cut

    Posted by Geno on Aug 16th 2021

    Cut was a perfect fit for the optic and came with screws to mount. Was hoping the cut could have been a bit deeper to get a better co-witness, but no big deal. Perhaps this is as deep as it can go. Turn around time was a week longer than expected, but again no big deal.

  • Spectacular work

    Posted by Tony on Jun 24th 2021

    Absolutely wonderful work. Tight tolerances and allows me to use my stock sights as backup. The beat part was when I went to zero it, it needed to adjustment saving me some ammo in scarce times. Usually my pistol optics need some adjusting after work but not this time. Great work, highly recommend.

  • Excellent work

    Posted by Evan on Jun 18th 2021

    Slide came back flawless and reassembled. I got the race cut as well as burnt bronze cerakote, turn around time + delivery was 9 weeks exactly. Hopefully turn around times improve but all in all I'm beyond pleased, excellent work.

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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.