The SIG SAUER P322 is one of the highest-capacity and most advanced .22LR pistols in its class, designed for shooters who want modern features in a lightweight, low-recoil platform. Ideal for training, range use, and recreational shooting, it delivers reliability and performance while keeping ammunition costs low.
Unlike many rimfire pistols, the P322 features a standard factory barrel paired with an included threaded barrel adapter, allowing shooters to easily convert to 1/2x28 suppressor compatibility. This setup provides maximum flexibility without permanently altering the barrel, making it easy to run suppressed or configure the pistol to your preference while maintaining factory reliability.
The single-action-only trigger is a major highlight, offering a crisp, clean break with a short, tactile reset, giving shooters better control and improved accuracy—especially important for training and high-volume shooting. With interchangeable trigger shoes, the feel can be tailored to user preference.
Combined with its 20-round capacity, optics-ready slide, and suppressor adaptability, the P322 delivers a premium shooting experience in a highly versatile rimfire platform.
Features
20-round magazine capacity
Optics-ready removable rear sight plate (RMSc footprint)
Includes threaded barrel adapter for 1/2x28 suppressor compatibility
Single-action-only trigger with crisp break and short reset
Interchangeable flat and curved trigger shoes
Fiber optic front sight with adjustable rear
Ambidextrous controls
Lightweight polymer frame
Important Specs
Caliber: .22 LR
Action: Single Action Only (SAO)
Barrel Length: 4"
Overall Length: 7"
Weight: 17.1 oz
Capacity: 20+1
Magazines Included: (2) 20-round polymer magazines
Sights: Fiber Optic Front / Adjustable Rear
Optics Ready: Yes (Shield RMSc footprint)
Frame: Polymer
Slide: Alloy, Hard Coat Anodized
Barrel Material: Carbon Steel
Barrel Type: Standard (non-threaded) with included adapter
Threaded Barrel Adapter: Included (1/2x28 suppressor compatibility)
Accessory Rail: M1913
Manual Safety: Yes
Trigger Type: Single-Action Only, interchangeable flat/curved
Trigger Pull: ~4.0–5.5 lbs (factory typical range)
Factory Included:
(2) 20-round magazines
Threaded barrel adapter (1/2x28)
Magazine loader
Interchangeable trigger shoes (flat & curved)
Owner’s manual
Cable lock
