What does it take to be a real "Mountain Gun"? I have aquired a clean and tight Nickle M25-5 in .45lc with 4inch barrel and half lug. #N8425XX 95% Full TT/TH/TS/RR/WO/SB Ribbed: barrel top, F&R sights, F&R gripstraps Does it have to be engraved on the barrel or is it just a general...