Don't forget to pick up a bayonet!! It's a MUST HAVE once you've seen that #51663 w/an Ontario M9 you will want one! Only been in the 'A1 club' for a few weeks and it's already smoothed up QUITE A BIT! Just pump it 100 times while watching T.V. and it'll slicken up, shooting hi-brass will help it a lot too!! I love mine, same as yours', just the #51668 w/GRS and speedfeed stock (all they had in 20" A1's w/GRS, but I actually LIKE the Speedfeed, it works well w/my'style' of shooting/reloading, and RETAINS it's shells VERY WELL now)... Make sure you check and MAKE SURE the front sight is COMPLETELY STRAIGHT, if not call Mossy, and have them send YOU the replacement barrel FIRST, any probs let me know, ENJOY FELLOW 'A1' owner!
Steve