Grey Ghost Precision GGP320 Compact Match Grade B
- Firearm Make Fit:
- Sig Sauer
- Finish-Color:
- Black
- Caliber-Gauge:
- 9mm Luger
- Material:
- Steel
The Grey Ghost Precision GGP320 Compact Match Grade Barrel delivers the accuracy and reliability you need in a drop-in replacement for your P320 compact build. Built from 416R stainless steel with a titanium nitride finish, this match grade barrel is engineered to tight tolerances and chambers spec'd for 9mm ammunition. Whether you're running a competition rig, a duty carry platform, or a range workhorse, a quality barrel upgrade is one of the highest-impact improvements you can make—and GGP's obsessive attention to precision specs proves their credibility in both military and civilian shooting circles.
Match grade barrels aren't just hype: the GGP320 is held to final dimensional tolerances of +/- 0.003", which translates to the kind of round-to-round consistency that separates a tack driver from a shooter who blames the gun. The 1:10 twist rate and SAAMI-spec chamber are purpose-built for 9mm ballistics. The titanium nitride finish protects against corrosion and wear while maintaining the clean, professional look serious shooters expect—no guessing whether this barrel was cut on a CNC or hand-fitted in a basement.
GGP was founded by professionals with deep roots in military manufacturing and competitive shooting. They built their reputation on three principles: accuracy, reliability, and attainability. This barrel reflects that philosophy. It's not exotic or boutique; it's a no-nonsense upgrade from a maker who understands what it takes to perform under pressure.
Key Features
- 416R stainless steel construction with match grade precision
- Titanium nitride finish for corrosion resistance and durability
- Drop-in design for P320 compact platforms
- Tight tolerances (+/- 0.003") for consistent accuracy
- 1:10 twist rate optimized for 9mm ammunition
- SAAMI-spec 9mm chamber
Specifications
| Material | 416R Stainless Steel |
| Finish | Titanium Nitride |
| Caliber | 9mm |
| Twist Rate | 1:10 |
| Chamber Spec | SAAMI |
| Dimensional Tolerance | +/- 0.003" |
| Type | Drop-in Match Grade Barrel |
| Platform | P320 Compact |
Frequently Asked Questions
Will this barrel drop in to my P320 compact without gunsmithing?
Yes. This is a drop-in barrel designed for the P320 compact platform, so it should function without modification. As always, verify fit and function, and if you're unsure about installation, have a qualified gunsmith handle it.
What ammunition should I use with the 1:10 twist rate?
The 1:10 twist is optimized for 9mm ammunition. Use standard 9mm rounds from your preferred manufacturer, loaded to SAAMI specifications.
Why does the titanium nitride finish matter?
Titanium nitride is harder than standard steel and resists corrosion, wear, and fouling better than bare stainless. It extends the life of the barrel and keeps it running clean over extended shooting sessions—especially valuable if you shoot often or in harsh conditions.
What makes a match grade barrel different from a standard barrel?
Match grade barrels are manufactured to tighter tolerances (in this case, +/- 0.003") and more precisely dimensioned chambers. The result is improved shot-to-shot consistency and accuracy, which matters whether you're competing or just want your gun to shoot its best.

