The latch on my A2-style Colt's butt plate is a real thumb nail buster. So, I usually use an implement to get it open. Supposedly, one of the differences between the Colt Canada C7 rifle and US M16A1/A2s is the butt plate's trapdoor is easier to operate. Any of you have experience with the Canadian version, or have modified an A2 for an easier opening trapdoor?