The Sig Sauer P220 Legion Full Size is chambered in 10mm Auto -- a caliber that brings more energy than .45 ACP while still fitting in a full-size service pistol frame. It holds 8+1 rounds, runs on a single-action trigger, and ships with a 5-inch barrel and X-Ray3 Day/Night sights. At 44 oz (2.75 lbs) it's a heavy gun, which works in its favor when managing 10mm recoil. 
 

Key Specifications 

• Brand: Sig Sauer 
• Model: P220 Legion Full Size 
• Caliber: 10mm Auto 
• Capacity: 8+1 rounds 
• Barrel Length: 5 inches 
• Overall Length (OAL): 8.80 inches 
• Weight: 2.75 lbs (44 oz) 
• Frame Material: Aluminum with Legion Gray Cerakote Elite finish 
• Slide Material: Stainless Steel with Serrated Legion Gray Cerakote finish 
• Grip Material: G10 Black with Legion Medallion 
• Sights Configuration: X-Ray3 Day/Night Sights 
   

Features 

The X-Ray3 sights are one of the better factory sight setups on a production pistol. The tritium front dot glows at night; the large green ring around it is easy to pick up in daylight without obscuring the target. The rear sight is blacked out to reduce distraction. 
 
The G10 grip panels have real texture -- they grip without being abrasive. The Legion Gray Cerakote finish covers both the aluminum frame and stainless slide, giving them a uniform appearance while protecting against corrosion. 
 
The single-action trigger means the hammer must be cocked before firing, which produces a shorter, lighter pull than most DA/SA designs. That consistency helps at the range, particularly under the added recoil snap of 10mm loads. 
 

Usage 

10mm is a flexible caliber -- enough energy for large game at handgun distances, good stopping power for personal defense, and factory loads ranging from downloaded practice rounds to full-power hunting loads. The P220's weight makes the harder loads manageable. It's a legitimate field pistol for outdoor use, and it holds its own in competition formats that allow major-caliber scoring.

The P220 Legion in 10mm has a clear fan base, and the feedback is specific rather than generic.

The X-Ray3 sights come up in almost every positive review. Owners credit them with faster target acquisition in mixed lighting, and several note that the sights alone would cost meaningful money if purchased separately. Build quality across the frame, slide, and fit is consistently rated as excellent -- the tolerances are tight and the Cerakote finish shows no obvious weak spots in normal use.

Recoil management with 10mm is a frequent topic. The 44 oz frame absorbs the impulse better than lighter 10mm pistols, and most owners describe the recoil as firm but manageable rather than punishing. Those who shoot full-power loads for hunting or woods carry especially appreciate the mass.

The SAO trigger receives generally positive feedback -- a clean break with short reset, better than most production guns. A minority of owners note that the external hammer and the need for a cocked-and-locked carry mode takes adjustment if you're used to striker-fired pistols.

Price is the main friction point. The P220 Legion costs noticeably more than competing 10mm pistols, which prompts debate about whether the premium is justified. Owners who bought one tend to say yes; people comparing on paper tend to hesitate. The overall reliability record is strong, with few reports of feeding or extraction issues across different ammunition brands.

The 8+1 capacity draws occasional criticism relative to double-stack 10mm options, but the P220 platform was always single-stack, and the tradeoff is a slimmer grip that many find more comfortable.