Hi - I recently acquired one of the Portuguese AR10 A1s and I'm hoping someone can help me with some information. It was built on a Sendra steel lower. Anyone know where I could find a manual on it? I know most of it is similar to a modern AR but I don't know how the gas system takes down or how the handguards are removed, etc. Also, the pistol grip, stock, and forearm are aluminum. They have been painted silver. I have seen another reference to that so I don't know if they did that to try and reflect some heat or ??? I guess I could strip the paint but what should the finish underneath look like - anodized, flat black,??? Does anyone know where I could get wood furniture for it? Lastly, I understand Brownells is releasing a retro version of it next month. Any thoughts on that or how it might effect prices of originals? Any and all help would be much appreciated. Thanks!