Smith & Wesson Model 43 Airweight J Frame Barrel 3.5" Pinned Blue Steel .22 LR, Part# 16-43-B
Smith & Wesson Model 43 Airweight Barrel 3.5" Pinned – Part# 16-43-B
This is a genuine factory Smith & Wesson 3.5" pinned barrel for the J Frame Model 43 (.22/.32 Kit Gun Airweight) revolver chambered in .22 Long Rifle. A used blue steel barrel in serviceable condition — a hard-to-find component for restoring or maintaining an original-configuration Model 43 Airweight.
Pinned barrel note: Smith & Wesson used pinned barrels on revolvers produced prior to approximately 1982. The barrel pin passes through the frame and barrel to secure the barrel in place. Pinned barrels are highly sought after by collectors and restorers seeking to maintain period-correct configuration. This barrel is the correct replacement for pre-1982 Model 43 Airweight revolvers.
Part Details
- Part Number: 16-43-B
- Part Name: Barrel, 3.5" Pinned
- Length: 3.5" (3 1/2")
- Finish: Blue Steel
- Condition: Used, factory original
- Frame: J Frame (Airweight — alloy frame)
- Caliber: .22 Long Rifle (rimfire)
- Configuration: Pinned (pre-1982 style)
Model Compatibility
| Model | Caliber | Frame | Barrel Config | Compatible |
|---|---|---|---|---|
| Model 43 Airweight (.22/.32 Kit Gun) — Pre-1982 | .22 LR (rimfire) | J Frame Alloy | Pinned | ✅ Yes |
| Model 43 Airweight — Post-1982 | .22 LR (rimfire) | J Frame Alloy | Non-pinned | ❌ Different barrel configuration |
| Model 34 (.22/.32 Kit Gun) — Pre-1982 | .22 LR (rimfire) | J Frame Steel | Pinned | ⚠️ Verify fitment — different frame material |
| Model 63 | .22 LR (rimfire) | J Frame Stainless | Non-pinned | ❌ Different finish & barrel config |
| Model 36 / 37 / 38 — Pre-1982 | .38 Special | J Frame | Pinned | ❌ Different caliber — barrel bore not compatible |
| K / L / N Frame | Various | Larger frames | — | ❌ Different frame size |
Note: Barrels are caliber-specific — a .22 LR barrel cannot be used with centerfire calibers. This is a pinned barrel for pre-1982 production revolvers only — it is not compatible with post-1982 non-pinned frame configurations. The Model 43 Airweight uses an alloy (aluminum) frame. Always confirm your revolver's production date and barrel configuration before ordering. Model numbers are stamped on the frame behind the yoke when the cylinder is swung out.
Installation
Barrel replacement on a pinned S&W revolver requires removal of the barrel pin, proper barrel timing, and cylinder gap verification. This is a gunsmith-level task — we strongly recommend installation by a qualified gunsmith experienced with vintage S&W revolvers to ensure correct headspace, timing, and safe function.
Questions about fitment or production date? Call or email us — we're happy to help.