The guys at Strike Industries have been experimenting with buffer springs. They emailed me asking if I knew why nobody sells progressive buffer springs for the AR-15. I actually have no idea why they are not made.
A progressive spring is a spring that has a “variable rate increase throughout the spring’s working range.” In other words, the distance between the coils is smaller at one end but gets further and further apart towards the other end. This means it offers less resistance to a small force, but progressively more resistance as a greater force is applied. In the context of a car suspension spring, a progressive spring can respond to slight changes on the surface of the road while also providing a lot of resistance to a pot hole.
I cannot decide if this would have a positive or negative effect on an AR-15.
Can any of our readers tell us why nobody is selling progressive AR-15 buffer springs?