Walther/Smith & Wesson SW99 .40 S&W Full-Size, 4.1 in Barrel, DA/SA Striker, Stainless Slide (Two-Tone), 12+1
This SW99 pairs a German Walther-made polymer frame with a U.S.-made Smith & Wesson slide and barrel, delivering a full-size .40 S&W platform with a DA/SA striker system and top-slide decocker. It features a natural stainless slide with front and rear serrations, a proprietary Walther-style accessory rail, and 3-dot sights with a windage-adjustable rear and interchangeable-height front. Capacity is 12+1, and the ambidextrous paddle-style magazine release and interchangeable backstraps support a customizable, user-friendly setup.
Condition
Overall Condition: Good condition, showing some signs of prior use and handling.
Bore Overall Condition: Good - Clean, well-maintained, minor wear marks.
Bore Rifling: Good Rifling - Intact, well-defined lands and grooves.
Specific Condition Notes: Scuffs and wear are evident.
What’s Included
- Smith & Wesson factory hard case (blue)
- One 12-round magazine
- Two additional interchangeable backstraps
- Smith & Wesson SW99/SW99 QA/SW990/SW990L safety & instruction manual
The SW99 is a collaborative design with a Walther-manufactured frame marked "FRAME MADE IN GERMANY," matched to a Smith & Wesson-produced slide and barrel. Chambered in .40 S&W, it uses a 4.1 in barrel and a 12+1 capacity, giving it a solid full-size configuration suited to duty-style handling and balance. The slide is natural stainless and includes both front and rear serrations for confident manipulation.
The striker-fired DA/SA system offers three trigger modes including Anti-Stress mode, supported by a top-slide decocker for safe return to double-action. A striker status indicator and a loaded-chamber indicator provide clear, tactile status checks. Control layout includes an ambidextrous, paddle-style magazine release that is easy to access from either side.
Ergonomics are adaptable thanks to interchangeable backstraps, with two additional sizes included to fine-tune the grip. Sights are a 3-dot setup with a windage-adjustable rear notch and an interchangeable-height front blade to dial in point of impact. The dust cover features a proprietary Walther-style accessory rail for compatible light or accessory mounting.
This example comes with its Smith & Wesson factory hard case and the SW99 family safety and instruction manual, rounding out a complete package that highlights the model’s binational build and feature set.