To all our friends who need a little more length of pull or just prefer a couple more options, the KAK Industry A5 buffer tube offers 9 adjustable stock positions for use with your favorite mil-spec stock. Precision milled and hard coat anodized right here in the USA, this A5 buffer tube is compatible with all AR-pattern mil-spec lowers and crafted for a lifetime of dependable service. Mfg: Kak Industry Llc.