The forend wood looks original, but it has been refinished with checkering recut.
The buttstock is definitely a replacement. No question about it. It was reasonably well done, but there are several clues to show it is not original. The area of the cheek panels where the side plates are is too wide, especially toward the rear. This is a little detail that many stockers don't get right. The teardrop drop points were never used on any Lefever I have seen. Some higher grades had an arrowhead drop point, and I have seen that same arrowhead style drop point on two lower grade Lefevers. (I own one of them) The inletting around the right side plate is a bit sloppy. The detail around the nose of the comb isn't quite right, but it was done better than is seen on many replacement Lefever stocks.
The dished out area just behind the frame, on either side of the forward portion of the top tang is another very telling give-away that this buttstock is not original. Wood is often removed or sanded away during a refinish, but adding or leaving wood where it never should have been isn't going to fool many experienced collectors.
It is hard to tell, but it appears the end of the buttstock wood is cut straight, while original Lefever buttstocks and buttplates are curved. The original LAC monogram buttplate may have been heated in boiling water and straightened. Finally, looking at the semi-pistol grip from the bottom, you can see it is much wider or more bulbous than any Lefever of this vintage I have seen. And I looked at one while writing this.
The right side cocking problem is probably due to a worn or fractured over-hanging sear notch, or the same on the hammer bent... perhaps compounded by an accumulation of dried oil and grunge.
