Does anyone know if the Tac-Sol X-Ring Reciever has buffers on their dual springs or if there is some aftermarket place available for them?

I've tried three sources and no one can tell me definitively if the reciever has buffers or not. As far as aftermarket searches, I can find buffers but nothing that specifically mentions this particular reciever. I'm not a fan of the metallic "clack"-ing on cycles...

Anyone know first hand?