Selected Handgun Detail

SIG
Model P320 Compact
SIG Pistol P320 Compact .45 Auto Variant-1
Scale To:
Gun Dimensions Width:1.3-in
Length:7.2-in Height:5.3-in
Barrel:3.9-in Weight:25.8-oz
Variant 1 of 2
Gun Rankings
  • Power Factor (230 grain bullet)184690
  • Recoil Factor (230 grain bullet)9.38 ft-lb
  • Total Capacity10 rounds
  • ConcealabilityGood
  • Defense Factor81%
Gun Specifications
Type:Pistol
Caliber:.45 Auto
Action:recoil operated semi-automatic
Trigger:striker single-action (SA)
Safety:no manual safety
Magazine:9-round
Frame:black polymer
Grip:integrated polymer
Sights:SIGLITE night sights
Notes:Nitron finish slide
Manufacturer
SIG SAUER GmbH & Co. KG
More Info
About the Gun

The P320 Compact is a medium-frame, striker-fired polymer pistol that pairs a compact-length slide and barrel with a compact grip module. This configuration reduces overall height and grip circumference compared with the full-size and Carry models while retaining the modular fire-control unit of the P320 platform. It features a Nitron-finished stainless steel slide in most examples, an accessory rail, and was offered with contrast or SIGLITE night sights (later versions added X-RAY3 options and optic-ready slides). The model was produced in 9mm, .40 S&W, .357 SIG, and .45 ACP.

Production

Production began in 2015 and is currently ongoing.

Market value
Last updated: 7/25/2026

MSRP is around $650. Current used market value for examples in good to very good condition ranges $400–$550.

Cartridge Specifications
Cartridge: .45 Automatic
Alias: .45 Automatic Colt Pistol (ACP)
More Info
Ballistics for This Gun
Selected Bullet Mass:230 grains
MV:803 ft/sec ME:329 ft-lbs
Analysis

SIG introduced the Compact size early in the P320’s commercial run to provide a more concealable alternative to the full-size and Carry configurations while preserving the platform’s modularity. The shorter grip module and matching slide length addressed demand for a duty-capable pistol better suited to everyday carry and smaller-handed shooters. Over time the lineup narrowed from four calibers to a primary focus on 9mm, with .40 S&W and .357 SIG discontinued around 2020 and .45 ACP continuing only in limited form. Concurrently the classic non-optic 9mm Nitron model transitioned toward an optic-ready slide, reflecting broader market movement toward red-dot compatibility. A manual-safety version briefly appeared mainly in 9mm. The Compact remains one of the core size options in the P320 family, bridging the gap between full-size control and more compact dimensions.

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