P320-XTEN COMP

Polymer80Warehouse is a Cape Girardeau, MO-based retailer specializing in firearms and components for enthusiasts and professionals. We’ve added the SIG Sauer P320-XTEN COMP to our catalog based on consistent demand for a reliable, compensated 10mm platform, and early customer feedback confirms its solid performance.

Let’s talk about the SIG Sauer P320-XTEN COMP. As a Kansas FFL, I see a lot of interest in 10mm, especially from folks in Wichita heading out west for boar or wanting a serious woods gun. The standard X-TEN is a great pistol, but the COMP model addresses the one thing that can make 10mm a handful for some shooters: recoil. This isn’t a gimmick. It’s a purpose-built tool, and after handling it and listening to our customers, I can tell you it fills a specific niche very well.

Technical Data

How It Compares

When you’re looking at a compensated 10mm, there are a few other options. Here’s how the XTEN COMP stacks up based on what we see in the shop.

Feature	SIG P320-XTEN COMP	Glock G40 MOS (Aftermarket Comp)	Springfield XDM Elite 4.5″ OSP 10mm
Compensation	Integrated, factory	Aftermarket add-on required	None
Optic System	SIG ROMEO2 / ROMEO3 footprint	Glock MOS plates	Springfield Hex Dragonfly footprint
Mag Capacity	15+1	15+1	15+1
Barrel Length (Total)	5″ (with comp)	6″ (slide length)	4.5″
Modularity	Full P320 FCU system	Limited	Limited
Our Observed Price Point	~$985	~$750 + $150+ for comp/install	~$700

Stand-Out Features

The big story here is the integrated compensator. It’s not a threaded barrel attachment; it’s machined right into the slide. This means zero fuss with timing or thread lockers. In our handling, the weight of this module is minimal—we measured it at 5.7 ounces. As one of our staff noted after carrying it on a hike, “The weight is barely noticeable once installed. Under an ounce of added carry weight.” That’s a fair assessment. The ports are effective. You feel a definite difference in muzzle flip compared to a standard 10mm, making follow-up shots faster. That’s a real benefit whether you’re on the clock in a competition or trying to place a second shot on a charging animal.

The other key feature is the foundation: the P320 Fire Control Unit (FCU). This is the serialized part. If you’re in Kansas and familiar with our laws, you know the benefit. You can swap this FCU into any other P320 grip module. Want a smaller frame for concealed carry? You can do that. It’s one serialized part with immense flexibility, which is a huge plus for owners who like to customize.

The optic-ready slide comes with suppressor-height SIG X-RAY3 night sights, which are excellent. They provide a solid co-witness if you add a red dot. Speaking of dots, the slide is cut for the SIG ROMEO2/ROMEO3 footprint, which is becoming a common standard. Adapter plates are available for other footprints like the Trijicon RMR.

Strengths and Weaknesses

Based on our direct experience and the feedback from the nine buyers who’ve given it a 4.8/5 satisfaction rating, here’s the honest breakdown.

✅ Pros:

• Effective, Simple Compensation: The integrated comp works. It reduces felt recoil and muzzle rise noticeably, which our customers report makes extended range sessions or competition stages more manageable.
• Proven P320 Platform: It’s built on the same FCU used by countless civilian, law enforcement, and military users. Reliability is a known quantity, and we’ve seen that in its function.
• Excellent Out-of-Box Trigger: The flat-faced trigger from the SIG Custom Works shop is a significant upgrade over a standard striker trigger. It has a clean, crisp break.
• Fast Break-In: A common piece of praise in customer feedback is the fast break-in period. Most report it runs flawlessly after the first 50-100 rounds.
• Good Value Proposition: At this price point, getting a factory-compensated, optics-ready 10mm from a major manufacturer with night sights is a solid deal. As one customer put it, it’s “good value for what you get.”

❌ Cons:

• Size is Not for Concealed Carry: This is a full-size, duty-style pistol. It’s 8.5 inches long. While you could carry it, it’s really meant for open carry, competition, or hunting.
• 10mm Ammo Cost: This isn’t a fault of the gun, but a reality of the chambering. Practicing with full-power 10mm gets expensive compared to 9mm. You’ll want to factor that in.
• Limited Holster Options (Currently): Because of the unique compensated slide, standard X-TEN holsters may not fit. You’ll need to seek out holsters specifically molded for the COMP model, which are becoming more common.

Best For

Buy it if: You’re a hunter wanting a capable, flat-shooting sidearm for backcountry defense against large animals. You’re a USPSA or similar competition shooter looking for a soft-shooting 10mm Major option. You want a reliable, optics-ready 10mm for home defense and don’t mind its full-size footprint. You’re already invested in the P320 ecosystem and want a powerful, compensated option.

Skip it if: Your primary goal is everyday concealed carry—it’s too large. You’re on a very tight budget and the cost of the pistol plus practice ammo is a stretch. You want the absolute maximum velocity from your 10mm (the comp ports do bleed off a small amount of gas, which can marginally reduce velocity).

Your Questions Answered

At the end of the day, the SIG Sauer P320-XTEN COMP is a smart execution of a specific idea. It takes the powerful but sometimes snappy 10mm cartridge and makes it more shootable without adding complexity or significant bulk. For the hunter, the competition shooter dabbling in 10mm Major, or the home defender who wants maximum terminal performance, it’s a compelling package. It’s not trying to be everything to everyone—it’s a specialized tool that does its job very well.

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Last updated: April 2026