Springs really are springs - DPMS Buffer Retainer Detent Spring

I sprung for springs because the Strike Industries takedown and pivot pin set I ordered did not come with springs (wtf is that SI?). Well, they shot these over to me with zero haste and by the time I got them, I had forgotten I ordered them. It was like magic! These little spicy slinkies do exactly what you want them to: fit in the tiny hole and push on the tiny pin. 13/11, these really are springs.