First Look: SIG Sauer P365X RomeoZero Handgun

posted on March 22, 2021

SIG Sauer is introducing the P365X RomeoZero, the newest addition to their P365 series of pistols. The P365X RomeoZero combines the 3.1-inch barrel of the original P365 with the P365XL XSeries grip module and features a 12-round, flush fit magazine, along with a factory-installed RomeoZero red-dot sight to bring a new level of performance to the everyday carry pistol.

“The SIG Sauer P365 series of pistols is the leader in the industry for everyday carry and continues to set the standard for delivering unprecedented capacity in a micro-compact size,” said Tom Taylor, Chief Marketing Officer and Executive Vice President, Commercial Sales, SIG Sauer. “The introduction of the P365X RomeoZero further redefines everyday carry by combining the XSeries features first introduced with the popular P365XL—including the larger grip module and XSeries trigger—with the shorter 3.1-inch barrel of the original P365, making it an all-around more comfortable concealed carry pistol.”

The SIG Sauer P365X RomeoZero is a 9 mm striker-fired pistol which uses an XSeries P365 grip module that has an integrated carry magwell and extended beavertail. The  P365X RomeoZero also has the standard 3.1-inch P365 barrel and slide with XSeries markings, a factory installed RomeoZero micro-open reflex sight, X-RAY3 day/night front sight, and the XSeries flat trigger with a 90-degree break. The P365X RomeoZero ships with two 12-round magazines, while 15-round magazines are also available separately. 

The SIG Sauer Electro-Optics RomeoZero micro open reflex sight is optimized for everyday concealed carry on pistols with slimmer slides. The sight features a ruggedized and textured polymer body as well as Spectracoat Polymer lens system and eight user configurable daytime illumination levels. The RomeoZero also has MOTAC (motion activated illumination system) to save battery life, a highly efficient point source LED emitter for a crisp dot that’s eight times more efficient than conventional red dots, and an integrated rear sight notch to co-witness with a standard height P365 front sight.

P365X RomeoZero Specifications:

  • Overall Length: 6 inches
  • Overall Height: 5.5 inches
  • Overall Width: 1.1 inches
  • Barrel Length: 3.1 inches
  • Sight Radius: 4.9 inches
  • Weight with an empty magazine: 18 ounces

RomeoZero Micro Open Reflex Sight Specifications:

  • Overall Height: .93 inches
  • Overall Length: 1.6 inches
  • Overall Width: .93 inches
  • Sight Window: .72 inches x .61 inches
  • Battery: CR1632
  • Brightness Adjustment: Manual push-button
  • Brightness Settings: 8 daytime settings
  • Weight: 0.4 ounces

More information on the P365X RomeoZero and other products from SIG Sauer is available at


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