WHAT DOES MILITARY SURPLUS GUNS FOR SALE MEAN?

I've used them in the past, and would want to possess one in the future. I am a fifth era veteran and really pleased with that, It is a Privledge to get served our place and would go all over again if desired! Thank You:How can you uncover them? Apart from local gunshops using an affinity for surplus guns, very good sources to buy areThe Rev. Debor