Sig Sauer P229 .40 S&W
Model: E29R-40-BSS
Sig Sauer P229 .40 S&W
Model: E29R-40-BSS
Full Specifications
About This Firearm
The Sig Sauer P229 is the compact sibling to the P226, scaled down for carry duty while keeping the same DA/SA hammer-fired operating system. In .40 S&W it carries 12+1 rounds through a 3.9" barrel and weighs 32 oz empty on an aluminum alloy frame with a stainless steel slide. The .40 P229 was for years the standard issue sidearm for the FBI, Secret Service, U.S. Marshals, and a long list of state police departments.
Sig built the P229 frame around .40 S&W specifically — unlike the P228 (which was a 9mm gun later necked up to .40 with mixed results), the P229 was engineered from the start to handle the .40 cartridge's bolt thrust. The trigger geometry matches the Sig P226 Elite, with a single-action pull around 4.4 lbs and a double-action pull near 10 lbs. SIGLITE night sights are factory standard, the slide is milled stainless rather than stamped, and the decocker-only control layout means no manual safety to manage on the draw.
Sig discontinued the classic P229 in .40 S&W as part of the company's shift to the P320 modular platform for law enforcement contracts. The P229 is still available as a Legion model and as the P229 Compact in 9mm, but the standard .40 production gun is out — used examples and LE trade-ins are the practical path. As an LE trade-in market, the P229 .40 sees more turnover than almost any other duty pistol, which keeps used prices reasonable and parts availability strong through Sig's customer service department.
Best For
Strengths & Limitations
- Engineered from the start around .40 S&W bolt thrust — not a necked-up 9mm frame, unlike some early competitors
- Massive LE trade-in market keeps used inventory deep and parts support strong through Sig customer service
- Discontinued in standard production; new buyers are shopping the used and LE trade-in market only
- Classic P-series is not optic-ready — adding a red dot requires aftermarket slide milling
- 32 oz weight is heavier than most polymer-frame compact .40s like the S&W M&P 40 M2.0 Compact, which matters for daily belt carry
Category Rankings
How the Sig Sauer P229 .40 S&W ranks among compact .40 S&W handguns.
Ballistics Calculator
Calculate trajectory, drop, and energy for .40 S&W ammunition.
.40 S&W Ballistics →Where to Buy
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Frequently Asked Questions
I heard older Sig P229 .40 frames had cracking problems. Is that true?
Yes, partially. Early P229 .40 production used a stamped sheet-metal slide with an aluminum frame, and a small number of those guns showed frame rail cracking under heavy high-pressure ammunition use. Sig switched to a milled stainless slide in the mid-2000s, and frames have been re-engineered since. Trade-ins from federal agencies (FBI, Secret Service) are almost all post-update guns. Pre-2005 .40 P229s on the used market should be inspected at the frame rails before purchase.
Can the P229 .40 convert to .357 SIG or 9mm?
Conversion to .357 SIG is a drop-in barrel swap — same as the P226. Conversion to 9mm requires a different barrel and a different magazine; the .40 magazine will physically fit but won't feed 9mm reliably due to the cartridge nose geometry. Sig still sells .357 SIG conversion barrels through customer service for buyers who want a second caliber without buying a second gun.
Are LE trade-in P229s worth buying?
Yes, with conditions: check that the slide is the milled stainless version (post-2005), confirm night sight tritium is still active (rated for 12-15 years), and budget for a recoil spring replacement at the 5,000-round mark. Trade-ins are typically the best dollar-per-round of a serious duty pistol available — Sig honors warranty work on trade-ins exactly the same as new guns.
