SIG Sauer P320-M18 Pro 9mm Compact with ROMEO-M17 Red Dot, 3.9 in Barrel, Black, 21+1
This P320-M18 Pro package pairs SIG Sauer's compact 9mm with the factory-installed ROMEO-M17 enclosed-emitter red dot. It features a 3.9 in barrel, ambidextrous manual thumb safety, and a serialized stainless-steel FCU in a modular polymer grip module. The pistol includes two 21-round magazines and one 17-round magazine, with USA manufacture and clear M18 and 9mm x 19 markings.
Condition
Overall Condition: Very good condition, showing only light, superficial signs of prior handling or use.
Specific Condition Details: This firearm is in great shape. Minor, superficial scratches and blemishes are present. The bore is clean and shiny.
Bore Overall Condition: Excellent - Clean, mirror finish, no signs of wear.
Bore Rifling: Excellent Rifling - Sharp lands and grooves.
What’s Included
- SIG Sauer factory hard case
- SIG Sauer P320-M17 manual
- SIG Sauer safety instructions booklet
- SIG Sauer ROMEO-M17 red-dot sight (installed)
- Two 21-round steel magazines
- One 17-round steel magazine
The P320-M18 Pro is a compact, striker-fired 9mm built around SIG Sauer's modular chassis system. The serialized stainless-steel FCU is visible through the frame window, and the black polymer grip module carries a SIG medallion. The slide is finished in black and marked "SIG SAUER M18," while the barrel hood is marked "9mm x 19."
Controls are fully ambidextrous where it matters: a manual thumb safety on both sides and an ambidextrous slide catch. A top-mounted loaded chamber indicator provides a visual reference. The slide includes front and rear serrations for confident manipulation.
This pistol comes with SIG's ROMEO-M17 enclosed-emitter red dot installed using the SIG-LOC interface that mates to the M17/M18 MHS cut. The optic has a left-side battery cap and a low mounting height. A front post with a single white dot complements the red dot for a simple sight picture.
The compact 3.9 in barrel balances concealability with shootability, and the included magazines support a generous on-board capacity. Two extended 21-round magazines and one 17-round magazine are provided, allowing both maximum capacity and a flush-length option.
A 1913-style 3-slot accessory rail on the dust cover accepts compatible lights or accessories. Additional details include a stainless-steel receiver, the MHS/SIG-LOC optic cut on the slide, and a factory case label showing SKU WM18-9-PRO-BLK-RM17.