Grey Ghost Precision has been in the aftermarket pistol slide game for some time now. Not so long ago they introduced Sig P320 slides to their product line. I had been eyeing them since the introduction. Then Grey Ghost introduced an O.D. Green Limited Edition version. I love OD Green. So here I am, OD green slide in hand!

The Grey Ghost Precision Sig P320 slides come in two size versions. The Compact and the Full size, or GGP320C and GGP320. I received the GGP320 full size version 1. They are essentially the same for review purposes. I also believe the only difference between the Limited Edition OD Green and the standard versions is the color. Especially since they are all the same price. Both slides come “stripped,” Therefore you must install all the necessary parts to make it complete and functionable.

When looking at the GGP320, the first thing you notice is the optics cut. It is a multi optics cut that uses a shim system to mount the different optics. These shims position the optic so that it is mounted securely. The shims and screws are provided, so there isn’t a need to hunt around for the proper screws. If not using an optic, a Grey Ghost marked G10 cover plate is included also. The optics cut can be used with optics that have the RMR, Leupold Delta Point Pro, SIG Romeo 1, and SIG Romeo 1 Pro footprints. I ended up mounting a Swampfox on the GGP320 because it uses the RMR footprint. It mounted up securely and works great.

Now that we have moved past the optic, the GGP320 has some other noticeable features. Instead of being a completely solid slide like the stock P320, Grey Ghost put three window cuts toward the front of the slide. One is on the top and then there is one on each side of the slide. These lighten up the slide some and it also makes the barrel stand out a little bit. The top of the slide isn’t rounded like the stock Sig one is. Instead, Grey Ghost put a flat cut on top and an angle cut on each side of that. Standard iron sight dovetails are also machined in. Probably the most functional addition to the GGP320 is the aggressive slide serrations. Grey Ghost machines them into both the front and rear of the slide. These serrations are way grippier than the stock ones, but not enough to tear your hands up. Between the slide serrations they also put an inlet cut. In this inlet is “GGP” and “limited Edition” text. I like how the logo and text are not very large, I would say tasteful.

The Limited edition OD Green GGP320 slide, as well as the FDE option, are both cerakoted. The cerakoting puts a nice finish on the slide. However, mine does show some holster wear. I guess one could say it is the start of a battle worn finish. I am not worried about the wear since the slide is machined from 416 stainless steel and essentially won’t rust. Since I’m on machining. Grey Ghost says their slides have tighter tolerances. This leads to better performance. You can actually feel the difference. There is less noticeable side to side and up/down play in the GGP320 slide over the factory one. The GGP320 is so much better machined, that just installing it dropped the trigger pull on my pistol by ½ pound. This was with all the same parts as before, the only difference was the GGP320 slide. I was pleasantly surprised.

Now down to why you are really here, what are my thoughts? The GGP320 slide is top notch. I have had zero problems with it. I love the OD Green. The shim system is pretty easy to mount optics on. Recoil seems about the same. It runs pretty much any ammunition from 115’s up to 147’s without any problems. The machining of the slide is nice with no noticeable machining marks. The iron sight dovetails are tight, but not too tight. Plus, if you just have a P320 fire control group, this makes for an excellent addition to your “build.”

Grey Ghost Precision has done another excellent job with the GGP320 slide. The Limited Edition OD Green is different, but in a good way. It looks fantastic and performs just as well. If you are looking at building out a P320, or just want something that makes mounting an optic easy, this slide might be just what you are looking for. Go check out Grey Ghost Precision and all their pistol slides, you won’t be disappointed.

Firearms Insider Reviews - 8 Key Points

Claim to Fame:

Sig P320 slide with optics cut and enhanced features

Target Market:

Those building a P320 or those wanting a new slide option with optics cuts

FNBs (Features & Benefits of this product):

Full length P320 slide for 4.7” barrels
Machined from 416 Stainless
Tighter tolerances
For 9mm only
Optic cut compatible with Leupold DPP, Trijicon RMR and SIG Romeo1 and Romeo1Pro
Shim plate and screws for optics included
G10 cover plate
Weighs 8.84 ounces
Aggressive slide serrations
Front slide window cuts

What other aesthetic options or finishes are available?

Black and Grey DLC, or FDE Cerakote

What others are saying?:

5/5 stars at Rainier Arms

Nice addition to P320

Nice addition to P320.I have a P320 as a backup competition gun with a Leupold Delta Point Pro mounted with a EGW mount on the rear sight cut. Nice to have a slide with a RMR cut. It was a drop in fit, it only required a minor adjustment for the optic. Overall, the gun feels lighter, not sure if cycles any faster or reduced recoil, but it is a nice upgrade.