The Smith & Wesson SD family is based on Smith & Wesson's first polymer frame pistol, the Sigma. It is similar to a glock, enough so that Glock sued S&W for patent infringement back in the Sigma days.
S&W SD9 | |
---|---|
Type | Pistol family |
Caliber | 9mm 40s/w |
Manufacturer | Smith & Wesson |
Care should be taken when sourcing parts not to confuse this with the Sigma (its parent, aka the SW9) or anything from the M&P series as they are incompatible. On the other hand the SD "Victory Edition" models are basically the same thing but with a stainless steel slide; those are compatible.
Parts kits for the SD9 and SD40, VE or otherwise, show up on GunBroker with some regularity and usually sell for between $100-$200. People selling them don't always name them consistently so be sure to search for all possible variants--SD9VE, SD9-VE, SD9 Victory Edition, etc.
Parts kits occasionally turn up in other places too, as do some individual parts. There isn't a strong aftermarket for this pistol so building your own kit by sourcing individual parts is not likely to be cheap or easy.
Parts kits may be missing a couple of small parts. The magazine release spring seems particularly prone to this but a replacement can be made out of steel rod. Effectively you'd be making a slightly longer Glock mag release spring.
The SD requires front rails which are similar to, but not the same as, Glock front rails. Rails can be manufactured by hand from aluminum square tubing or simply purchased from a specialty vendor.
There are two SD based projects, one for the SD9 and one for the SD40:
https://en.wikipedia.org/wiki/Smith_%26_Wesson_SD
https://en.wikipedia.org/wiki/Smith_%26_Wesson_SD_VE