Description
Some pistols earn their reputation over decades, and the Sig Sauer P220 is at the top of that list. Introduced in 1976, it was the gun that kicked off the modern Sig Sauer era and quickly built a name as one of the most accurate .45s you could pull straight out of the box. Nearly fifty years later, this full-size Nitron version keeps everything that made the original a legend while adding the touches you want on a modern duty-grade pistol.
What Makes the P220 Nitron Worth Owning
The slide is machined from stainless steel barstock and coated in Sig's wear-resistant Nitron finish, so it shrugs off holster wear and rough weather without complaint. Underneath sits a hard coat anodized aluminum alloy frame that keeps the loaded weight around 30 ounces, light enough for all-day carry on a belt but with enough heft to soak up .45 ACP recoil. The 4.4 inch carbon steel barrel gives you a solid 6.3 inch sight radius, and the SIGLITE tritium night sights glow around the clock so your sight picture is there whether the lights are or not. An integral rail up front handles a weapon light or laser without any gunsmithing.
Classic DA/SA Trigger, Proven Sig Safeties
The hammer-fired DA/SA action gives you a deliberate double-action first pull followed by crisp single-action shots, and the decocking lever lets you safely lower the hammer on a loaded chamber. Behind that trigger sits Sig's four-point safety system, including an automatic firing pin block, so the pistol only fires when you mean it to. The single-stack grip keeps the frame slim in the hand, which is a big part of why so many .45 fans shoot the P220 better than anything else they own.
Range Ready From Day One
Sig ships this P220 with two 8-round steel magazines, so you have got a spare loaded before you ever leave the bench. Whether it fills a duty holster, a nightstand, or the spot in your safe reserved for classics, this is a .45 that will still be running long after trendier pistols come and go.
Key Specifications
- Model: P220 Nitron Full-Size
- Manufacturer Part Number: 220R-45-BSS-CA
- UPC: 798681437238
- Caliber: .45 ACP
- Action: Double Action/Single Action (DA/SA)
- Capacity: 8+1 Rounds
- Barrel Length: 4.4 in, Carbon Steel
- Slide: Serrated Stainless Steel, Black Nitron Finish
- Frame: Aluminum Alloy, Hard Coat Anodized Black
- Sights: SIGLITE Tritium Night Sights
- Sight Radius: 6.3 in
- Grip: Black Polymer
- Safety: Decocking Lever, Four-Point Safety System
- Accessory Rail: Integral SIG Rail
- Weight: 30.4 oz
- Overall Height: 5.5 in
What’s Included
- Sig Sauer P220 Nitron pistol
- Two 8-round steel magazines
- Owner's manual
- Lockable hard case
Frequently Asked Questions
Is the Sig Sauer P220 a good choice for a first .45 ACP pistol?
It is one of the best places to start. The P220 has a reputation going back to 1976 as one of the most accurate .45s straight out of the box, and its alloy frame with a full-size grip helps tame recoil better than smaller .45s. The DA/SA trigger also builds good habits, since that longer first pull adds a deliberate step before the crisp single-action shots that follow.
How does the decocker on the P220 work?
After chambering a round, you press the decocking lever and it safely lowers the hammer without touching the trigger. That leaves the pistol in double-action mode with a longer, heavier first pull, which is how most people carry a DA/SA gun. It is part of Sig's four-point safety system, which also includes an automatic firing pin block, a safety intercept notch, and a trigger bar disconnector.
Are the SIGLITE night sights on this P220 tritium or fiber optic?
They are tritium night sights, meaning the vials glow on their own around the clock without needing light exposure or batteries. In daylight they work like standard three-dot sights, and in low light the tritium takes over. Tritium vials typically stay usable for well over a decade before they dim noticeably.
Will the P220 Nitron accept a weapon light?
Yes, the frame has an integral SIG accessory rail molded right into the dust cover. Most common rail-mounted lights and lasers will fit, though it is worth confirming your specific light lists SIG rail or Picatinny compatibility. Just keep in mind holster fit changes once a light is mounted, so pick a holster molded for your exact light and gun combo.





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