Im building an 18” rifle length gas system. Im going to run a vltor length buffer tube. Im looking to run a 10oz buffer from heavy buffer .com i will be running it mainly suppressed, but will also run unsupressed dont want to run a adjustable gas block. . Does anyone have one of these buffers if so can you measure it for length. Pcc 10oz in 4.125” vltor is 3.995