Abstract: There are some problems in the buffer of machine gun remote control weapon station, such as low energy absorption rate, secondary impact and excessive stiffness, which lead to the aggravation of muzzle vibration and affect shooting accuracy. In order to solve the above problems, a new type of buffer was designed and studied based on Mn-Cu damping alloy. The generalized fractional Maxwell constitutive model of Mn-Cu damping alloy was realized in finite element software, and vibration characteristics tests of Mn-Cu damping alloy cantilever beam were carried out to verify the subroutine. Two types of disc spring buffers were designed using genetic optimization algorithm. One is made of 8 pieces of disc springs, which are placed opposite each other. The other is made of 24 pieces of disc springs that set three congruent pieces as one group and the groups are placed opposite each other. After the nonlinear transient finite element analysis for two kinds of new buffer, it is found that the vibration absorption effect of the 24-pieces disc spring buffer is better than the other one. Its vibration acceleration RMS values can be reduced by 66.42% when compared with the original rectangular spring buffer. The static pressure test shows that the static energy absorption rate of 24 pieces disc spring can reach 37.1% at 3 kN. The drop weight test shows that its average dynamic energy absorption is 63.64%, which is 1.51 times that of the original rectangular spring buffer. And its maximum recoil displacement is 2.69 mm, which has decreased 30% compared with that of the original rectangular spring buffer.