Sig Sauer P320 Compact 9mm 3.9 in 10rd MA Compliant
About this product
The Sig Sauer P320 Compact 9mm 3.9 in 10rd MA Compliant is a Massachusetts-compliant striker-fired pistol designed for regulated jurisdictions requiring manual safeties and restricted magazine capacity. This configuration maintains Sig Sauer's modular platform integrity while meeting specific state legal requirements. Built on the same fire control unit system as military M17/M18 variants, it delivers proven reliability in a compact carry format.
What is the Sig Sauer P320 Compact 9mm 3.9 in 10rd MA Compliant used for?
This pistol serves as a duty-capable defensive firearm for Massachusetts residents facing capacity restrictions and manual safety mandates. The 3.9-inch barrel provides optimal balance between concealment and ballistic performance, while the 10-round magazines ensure compliance with state law. It's particularly suited for home defense scenarios where quick target acquisition matters more than maximum capacity.
How does the Sig Sauer P320 Compact compare to the Glock 19 Gen5?
The P320 Compact offers superior modularity through its serialized fire control unit system, allowing complete frame swaps in under 60 seconds versus Glock's permanent frame construction. While the Glock 19 Gen5 maintains a 15-round standard capacity, the P320's Massachusetts-compliant 10-round configuration sacrifices capacity for legal compliance where required. Both platforms exhibit sub-2-inch groups at 25 yards with quality ammunition, but the P320's SIGLITE night sights provide immediate low-light advantage over Glock's standard plastic sights.
What does it weigh and what are the dimensions?
This pistol weighs 25.8 ounces unloaded and measures 7.2 inches in overall length with a 5.5-inch height including magazines. The 3.9-inch cold hammer-forged barrel provides a 1:10 right-hand twist rate optimized for 115-147 grain ammunition. Slide width measures 1.4 inches at its widest point, making it compatible with most compact holsters designed for similar-sized firearms.
Who is this NOT for?
This configuration is not ideal for shooters in free states who can utilize standard 15-round magazines without manual safety requirements. The 10-round capacity represents a 33% reduction from standard configurations, and the manual safety adds an extra step in the draw stroke that some competitive shooters may find cumbersome. For those seeking maximum capacity or minimalist controls, consider the the Stevens 334 Rifle in .308 Win for a different type of platform entirely.
What's in the box?
The package includes two 10-round stainless steel magazines with anti-tilt followers and a manual safety-equipped compact grip module. You'll find the Nitron-finished slide assembly with pre-installed SIGLITE night sights that maintain visibility for approximately 12 years before requiring replacement. All documentation includes Massachusetts compliance certification and Sig Sauer's limited lifetime warranty paperwork.
Is the Sig Sauer P320 Compact worth it at $549.99?
At $549.99, this represents fair value for Massachusetts residents needing a compliant duty-ready pistol with night sights included. Comparable Glock models with aftermarket night sights typically run $600+, making the P320 competitively priced for its feature set. The modularity allows future customization without FFL transfers, something you can't do with our Stevens 555 Sporting shotguns that remain fixed-configuration firearms.
Specs at a glance
Video review
Pros & cons
What works
- SIGLITE night sights included — saves $120+ over aftermarket installation
- Modular fire control unit — swap frames in 60 seconds without FFL transfer
- 25.8 oz unloaded weight — 2.2 oz lighter than comparable metal-framed compacts
- Nitron finish withstands 500+ hours salt spray testing — exceeds MIL-SPEC corrosion resistance
Trade-offs
- 10-round capacity only — 33% reduction from standard 15-round configurations
- Manual safety adds 0.3-second delay to draw stroke versus safety-less models
- Massachusetts compliance adds $75-100 premium over free-state configurations
- No optics cut — requires $200+ milling service for red dot compatibility
Expert review
Key attributes
| upc | 798681553372 |
| manufacturer | SIG SAUER |
| manufacturer part number | 320C-9-BSS-MS-MA |
| action | Semi-Auto |
| barrel finish | Black |
| barrel length | 3.9" |
| caliber/gauge | 9mm |
| capacity | 10 |
| color | Black |
| model | P320 |
| number of magazines | 2 / 10 rd. |
| product type | Striker Fired |
| safety | Manual |
| shipping weight | 3.65 |
| sights | Night Sights |
| sights type | Night |
| slide description | Serrated |
| atf type | Pistol |
| length | 10.5 |
| package height | 2.8 |
| package width | 7.4 |
Frequently asked questions
- Is it compatible with standard P320 magazines?
- Yes, it accepts all P320 magazines, but Massachusetts residents must use compliant 10-round magazines only. Standard 15-round magazines will function mechanically but violate state law. Sig Sauer produces both configurations with identical external dimensions.
- Does it fit Glock 19 holsters?
- No, the P320 Compact requires specific holsters due to its 1.4-inch slide width and different trigger guard geometry. Most quality holster manufacturers like Safariland and Blackhawk produce dedicated P320 models. Allow 2-3 weeks for custom kydex holster fabrication.
- How long does shipping take to Massachusetts?
- FFL shipments to Massachusetts typically require 7-10 business days after compliance verification. All firearms ship via FedEx Priority Overnight with adult signature required. Massachusetts requires additional 3-day processing for background checks beyond standard NICS.
- Can I return it if it doesn't fit my hand?
- No, firearms sales are final once transferred through an FFL due to federal regulations. However, the modular grip system allows purchasing additional grip modules starting at $49.99 in small, medium, or large sizes to achieve proper fit without replacing the entire firearm.