- CNC mill your Sig P320 slide for your optic
- Cerakote or Black Nitride refinish entire slide
- Our suppressor sights will only co witness with Trijicon RMR and Vortex Viper
- We do NOT mill for Sig Romeo Optics
- Optic MUST be sent with slide
- We do NOT mill P320 slides which have already been milled for an optic from the factory
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.
What to do after you order:
- Print order confirmation email
- Send copy of confirmation email with slide (does not need to be disassembled) and optic to:
2951 Railroad Ave
Morgan City, LA 70380
Current turn around time is 2-3 weeks.
9 Reviews Hide Reviews Show Reviews
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
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.
This is my first time getting a slide milled for an optic and I gotta say I'm blown away. The fit of the optic to slide is phenomenal. Very tight. I also am very impressed with the cerakote job they did. It is very clean, even in some of the harder to get areas. To top it off turn around time is great. From day of sending off to getting it back was maybe two weeks. All around A+ job and will be sending my P07 for slide work next.
This is the second slide I have had milled, it came back perfect. Side by side the two look identical, the black nitride finish is better than the original from the factory. If you are looking for this service done just right, buy from these guys, they know exactly what they are doing.
Perfect job. Couldn't have asked for better. They will treat your "baby", like it was their own.
Turn around time was much faster than expected, I had my slide milled for an RMR and cerakote work. The machine work was top notch, very tight tolerance. The cerakote finish was flawless, I will be a returning customer. Thanks!
The folks at primary machines sure know their way around a slide. I sent my p320 off to get an rmr installed and it came back like they had simply placed the optic on the slide and that was that. It is so cleanly machined you can hardly tell any work was done. I opted for the black nitride finish and side by side it looks better than the finish that the p320 came from the factory. Optic is rock solid on the slide and I am confident racking the slide using the optic. That thing is on there.
I had to take one star off because after about 100 rounds the rear sight came loose. I sent in a set of brand new trijicon suppressor height night sights for them to install so I was a bit surprised it came loose. Thankfully dropping some red loctite in the dovetail and punching the sight back in seems to have fixed the issue for now.
I plan on sending in 2 or three more slides to have them perform this service on, great work and decent turn around time.
Can't be happier with my slide, coating, and cowitnessing sights, well worth the wait. Will def. use Primary Machine again.
I had my Sig Sauer P320 cut for the Vortex Viper and Primary Machine did an outstanding job! They also Cerakoted the slide and man does it look sweet! I would recommend them for their work!!