Angelbird is an Austrian company that has specialized in providing high quality SSD products, including a lineup of SSDs targeted at Mac users who want to increase their storage capacity.
Their Wings PX1 M.2 SSD to PCIe adapter is designed to not only let you run any PCIe M.2 based SSD over your motherboard's PCI-Express slots, but also caters to the thermal needs of modern SSDs, like the Samsung 950 Pro.
When installed directly into the motherboard, the Samsung 950 Pro will run into its thermal limit when heavily loaded, which will from time to time result in reduced performance. Also, unless you are running a Z170 or X99 motherboard, the M.2 slot on your motherboard will only have x2 PCIe bandwidth available, which will cap the raw power of the 950 Pro and similar high-performance M.2 SSDs due to limits in bandwidth.
Angelbird's Wings PX1 uses an interface capable of up to PCI-Express x4 3.0 and is priced at US$75.