Purchased a Desert Fox SKS buffer (Black hard plastic/rubber ?) Are they GTG or are there only a few that actually work (Buffer Technologies ?)
They are pointless
I have no idea how they would work in an SKS or any other semi-auto rifle/carbine for that matter. But I have used (and am at present using) leather buffers and heavier springs in my .45 autos because I shoot +p loads. The DO NOT absorb or lessen recoil but merely has a cushioning effect to help prevent the slamming of the slide to the rear.
As Loose}{Cannon is alluding to, they probably are not really needed in an SKS!
If the bolt/carrier are striking/contacting the rear of the receiver, then simply replace the recoil spring. Sticking a buffer removes the empty space and transmits the force to the rear of the receiver, when in reality, it's not even supposed to contact the area to begin with. It's simply a bandaid for a weak recoil spring.
And if it needed a buffer, why wasn't it designed with a buffer, they knew and realized the need for them before the SKS was even dreamed up, the PPSh-41 and PPS-43 both have one. Even the Finnish Suomi designed in 1931, it kind of has a crude buffer, it uses compressed air trapped in the receiver as a buffer. How many rifles through the years have survived without a buffer that a buffer is now made for? I never have found a USGI issue buffer in my M1 Carbines or Garands, but, one is made for them.
But, hey it's your money.