The One Horse H2 buffer carries roughly 1.7 oz over standard carbine weight, achieved through a dual tungsten weight configuration within a mil-spec carbine-length body. The increased mass further slows carrier velocity during the recoil cycle, reducing peak rearward energy transferred to the receiver extension and moderating bolt bounce on return to battery. External dimensions match standard and H1 buffers, maintaining drop-in compatibility with a mil-spec buffer tube. Not sure if the H2 is the right weight? Compare all three in our H1 vs H2 vs H3 buffer guide.