SIG Sauer P320 Compact
Compact
Direct
Concealed Carry / Home Defense / Range
The SIG Sauer P320 Compact combines the modular P320 fire-control system with a shorter slide and compact grip designed for versatile everyday use. Its 3.9-inch barrel and 15-round standard capacity strike a balance between concealability and shootability, while optics-ready configurations allow the pistol to accept modern pistol-mounted red dots.
Full Specs
Manufacturer
Caliber
9mm
Optic Footprint
DeltaPoint Pro / SIG Romeo
Capacity
15
Mounting System
Direct
Barrel Length
3.9 in
Overall Length
7.2 in
Best For
Concealed Carry / Home Defense / Range
Width
1.3 in
Optic Ready
Yes
Frame Size
Compact
Weight
25.8 oz
Recommended Optics
🏆 BEST OVERALL
SIG ROMEO-X Enclosed Pro
The SIG SAUER ROMEO-X Enclosed Pro combines a fully sealed enclosed-emitter design with a rugged 7075 aluminum housing, low deck height, side-loading battery and MOTAC motion activation. Its DeltaPoint Pro footprint and standard-height iron-sight co-witness capability make it a premium option for full-size and duty-oriented pistol builds.
Specifications
Footprint: DPP
Installation: Direct Fit
Reticle: 2 MOA Red Dot / 32 MOA Circle
Window Size: 24 mm Clear Aperture
Weight: 1.4 oz with battery
Battery: CR1632
Battery Life: Up to 20,000 hours
Recommended Use: Home Defense, Range, Enclosed Emitter, Premium
Housing Material: 7075 Aluminum
Waterproof Rating: IPX7
Brightness Settings: 12 daylight / 3 NV
Shake Awake: Yes
Night Vision Compatible: Yes
Features
- Fully enclosed and sealed optical system
- CNC-machined 7075 aluminum housing
- 2 MOA dot / 32 MOA circle reticle
- DeltaPoint Pro mounting footprint
- Distortion-free aspherical lens
- Side-loading CR1632 battery
- Up to 20,000-hour battery life
- MOTAC motion-activated illumination
- MAGNETAC magnetic activation
- D.A.R.C. night-vision technology
- 15 illumination settings
- 3 dedicated night-vision settings
- Ultra-low deck height
- Standard-height iron-sight co-witness capability
- Patent-pending beryllium copper flexure system
- Assembled in the USA
- SIG SAUER Infinite Guarantee
Pros & Cons
Pros
Enclosed emitter provides excellent protection from weather and debris
Rugged 7075 aluminum housing
Low deck height for standard-height iron-sight co-witness
Side-loading battery doesn’t require optic removal
MOTAC helps conserve battery life
Multi-reticle system gives both fast acquisition and precise aiming
Night-vision compatible
Relatively lightweight for an enclosed full-size optic
DPP footprint gives us another strong option beyond RMR-pattern optics
Excellent premium/duty-build appeal
Cons
Expensive
20,000-hour runtime is lower than some competitors
No solar backup
Larger than micro-compact optics
DPP footprint limits direct-fit compatibility compared with RMR-pattern options on some pistols
More expensive than the open-emitter ROMEO-X Pro
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Affiliate Disclosure: We may earn a commission from qualifying purchases made through links on this page, at no additional cost to you.
Compatibility Note:
Some pistols require an adapter plate. Always verify your pistol’s optic cut before purchasing.
💰 BEST VALUE
Leupold DeltaPoint Pro
Large-window RMR-style optic offering a clear sight picture and proven performance for duty and competition use.
Specifications
Footprint: DPP
Installation: Adapter Plate May Be Required
Reticle: 2.5 MOA Dot 6 MOA Dot 7.5 MOA Delta Reticle
Window Size: 1.01″ × 0.68″
Weight: 2. oz
Battery: CR2032 (Top-Loading)
Battery Life: Up to 1,600 Hours (Low Brightness)
Recommended Use: Duty, Competition, Home Defense, Range
Housing Material: Aircraft-Grade Aluminum
Waterproof Rating: 33 ft (10 m)
Brightness Settings: 8 Daylight / 2 Night Vision
Shake Awake: Yes
Night Vision Compatible: No
Features
Features
Large Viewing Window
One of the largest windows available on an open-emitter pistol optic, providing an expansive field of view for faster target acquisition and easier dot tracking during rapid fire.
Crystal-Clear Optical Glass
Premium glass delivers outstanding clarity, excellent light transmission, and minimal distortion for a sharp, bright sight picture.
Motion Sensor Technology (MST™)
Automatically turns the optic on when movement is detected and conserves battery power when the firearm is stationary.
Tool-Free Battery Replacement
The top-loading CR2032 battery compartment allows quick battery changes without removing the optic or losing zero.
Aircraft-Grade Aluminum Housing
Machined from durable aluminum to withstand heavy recoil and demanding duty or competition use.
8 Brightness Settings
Offers multiple brightness levels, including a dedicated night vision setting, allowing the dot to remain visible in virtually any lighting conditions.
Spring Steel Adjustment System
Leupold’s precision adjustment mechanism helps maintain zero under heavy recoil and repeated use.
Waterproof & Fogproof Construction
Built to withstand rain, moisture, and harsh environmental conditions while maintaining reliable performance.
Optimized for Fast Target Acquisition
The combination of a large window, crisp dot, and rugged design makes the DeltaPoint Pro one of the easiest pistol optics to shoot quickly and accurately.
Pros & Cons
Pros
Large viewing window for excellent dot tracking
Outstanding glass clarity
Motion Sensor Technology extends battery life
Top-loading battery compartment
Excellent choice for competition or duty use
Lightweight aluminum construction
Clear, crisp dot
Proven Leupold durability
Cons
Shorter battery life than many Holosun optics
Uses the DeltaPoint Pro footprint instead of the more common RMR footprint
Open emitter can collect dirt, lint, or moisture
More expensive than many comparable open-emitter optics
Single-button brightness controls take some getting used to
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Affiliate Disclosure: We may earn a commission from qualifying purchases made through links on this page, at no additional cost to you.
Compatibility Note:
Some pistols require an adapter plate. Always verify your pistol’s optic cut before purchasing.