Just purchased a Century L1A1 Sporter Rifle. The little booklet that came with it said, "...the pin in the front of the catch is not long enough to engage the magazine follower." Does this mean that the rifle will not lock back after the last round has fired and the magazine is empty? If so, is there a replacement hold open catch that I can buy and use to have it lock back. The FN FAL military manual says that the rifle should lock back.