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Quick Look

The Sig Sauer P320 RXP is a striker-fired polymer pistol introduced in the mid-2010s, notable for its modular design allowing caliber and grip size changes. It combines durability with a built-in Romeo1PRO optic for rapid target acquisition. Today, it holds a strong reputation among law enforcement and civilian shooters for its adaptability and sight integration.

Why It's a Top Choice

Modular grip sizes for personalized fit
Factory-mounted Romeo1PRO red dot sight
Striker-fired trigger with smooth pull
Reliable SIG Sauer craftsmanship
Compatible with standard P320 parts

Key Variants

P320 RX

Compact version for everyday carry with the Romeo1PRO optic for fast target acquisition.

P320 X-Five

Competition-ready model emphasizing accuracy and enhanced ergonomics.

P320 M17

Military variant adopted by the U.S. armed forces with durability upgrades.

Competitor Comparison Table

Feature	P320 RXP	Glock 19	Smith & Wesson M&P 2.0
MSRP	$899 (approx.)	$600 - $700	$650 - $750
Capacity/Size	17+1 rounds / Compact	15+1 rounds / Compact	17+1 rounds / Compact
Weight	~30 oz	~23.65 oz	~26 oz
Optics-Ready	Yes, Romeo1PRO installed	Frame optic cut available	Optic-ready slides available
Trigger Type	Striker-fired	Striker-fired	Striker-fired
Notable Pro	Integrated red dot optic	Proven reliability, aftermarket support	Ergonomic grip, durability
Notable Con	Heavier than some compacts	No optic included	Slightly heavier trigger pull

Best Use Cases

Self-defense with optic-enhanced sight picture
Law enforcement duty carry
Competition shooting with modular setup
Range practice with reliable performance
Personal collection: modern modular pistol

FAQs

Can I change the grip size on the Sig Sauer P320 RXP?

Yes, the P320 RXP features a modular grip system allowing users to swap sizes for a custom fit.

What optic comes installed on the P320 RXP?

It comes factory-equipped with the Sig Sauer Romeo1PRO red dot optic for quick target acquisition.

How does the P320 RXP compare in capacity to a Glock 19?

The P320 RXP holds 17+1 rounds while the Glock 19 typically holds 15+1 rounds with standard magazines.

SIG SAUER P320 RXP for Sale