Quote Originally Posted by Lithy View Post
Assuming you mean that you have a Rifle No4 Mk1 (there is no such animal as a No1 Mk4), find a mate with another #4 that is working correctly and borrow his mag to try in your rifle. If it works well with the borrowed mag, compare the two paying particular attention to the feed lips. Adjustment may be needed.
Of course your right, it's a No.4mk1. I must of been over tired? Thanks for correcting me.
Sorry, Steve