hello all new to the forum.i have a dpms g2 moe and i am looking for a 7 3/4" buffer tube but it needs to measure 7"s on the inside.the reason is i have a ctr stock for mil spec and the dpms tube is commercial and it measures 7 3/4 total lenght and 7 inches on the inside. it use a 2 1/2" buffer is why it needs to be 7 inches on the inside.thank you all for your advice in advance