Sig P320 Optic Milling

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  • Sig P320 Optic Milling
  • Sig P320 Optic Milling
  • Sig P320 Optic Milling


Model: Sig p320

Service: CNC Mill Slide For Optic (Optic MUST Be Sent With Slide - No Exceptions)

Finish: Cerakote Or Black Nitride

Notes:  We Do NOT MILL For Romeo Optics & We Will NOT Mill Slides Which Have Been Milled From Sig

Sight/Co Witness Notes:  Our Sights Will ONLY Work With Trijicon RMR & Vortex Viper

Other: We mill precision pockets for your optic! While many companies will mill an over sized "one size fits all" pocket, ours is precision as per your optic. The cycling of a pistol slide is not gentle. The last thing you want is all that force to simply be on the mounting screws due to an optic pocket milled too big! Screws have been known the shear and break over time due to improperly milled slides.

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16 Reviews

  • 5
    Sig P320 Optic Milling

    Posted by Mike on Apr 17th 2019

    Absolutely perfect job. Hard to believe but no zeroing required. I didn't even send the barrel but it shoots point of aim at 25 feet. Tight fit of RMR to slide and proper recoil lugs milled in. Iron sights co-witness perfectly. Will definitely have more done.

  • 5
    Milling was A++++, mountin of Vermont red dot is top of the line.slide finish is superb

    Posted by Andy Brooks on Sep 15th 2018

    Top of line

  • 5
    Sig P320 optic milling

    Posted by Brian on Aug 27th 2018

    Unbelievable quality and service. I seldom write reviews but was very impressed with the optic milling and cerakote performed by Primary Machine. The optic fits very tightly. I also wanted to share the excellent customer service and how quick they turned around my order. Very impressed and will continue to send them my business.

  • 5
    P320 optic milling

    Posted by Chet on Aug 19th 2018

    Very happy with slide and optic. Fast turnabout. Placed a 100 rounds through it and was flawless. Plan to send a Glock now!!

  • 5
    Great slide milling on P320 Tactical for RMR.

    Posted by David on Jul 30th 2018

    The workmanship looks great and I shot 150 rounds through it this weekend. Functions well. Even zeroed in when I got it.

  • 5
    Sig p320 slide milling and re-finishing

    Posted by Mike on Jul 24th 2018

    Hello all , I have sent in a sig p320 slide to be milled for a rmr opticand re-finishing in magpull fde which surprisingly matched almost perfectly with the fde plastic grip & alsoeven better on the optic it self. The milling job was well done and vary tight fit which is great for carry pistols. Also the co-witnes sights line up good and doesn’t take up much space in the optic window as I was plesantly surprised about an all around good job in all. The only con i thought could be inproved would be the contact system , i tried to call multable times in the limited hour’s thay provide for calling but I had no such luck but there is an option to leave a voise-mail. I was however able to contact them on the facebook mesage on there page and responded to the questions quickly and clearly with all my conserns. There work is vary good and I would recomend them if your on the fence.

  • 5
    Sig P320

    Posted by Craig on Jul 19th 2018

    Awesome job on my Sig P320 project! It earned you 2 more slide milling and coating jobs-keep up the great work!

  • 5
    P320 optic cut/cerakote

    Posted by Ezekiel on Jun 18th 2018

    What amazes me is the quality and fast turn around of Primary Machines work. One week! Would recommend highly and would send other slides in the future for work

  • 4
    SIG P320 in 9mm

    Posted by JW on Apr 16th 2018

    Perfect milling for my RMR. Great Paint Job.

    The only reason I am not giving a 5 star is because they do not sell milling caps to cover the milled area on the slide for SIGs.

    *About the only thing you will MAY, not need, want to do after milling, is buy a battery plate to cover a small milling.

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