I know what you're saying Thunder but take it from me. If the sight wouldn't go down or you couldn't get the bolt in OR out, it wouldn't have got past the first very basic in or out inspection. And the FTR out inspection programme was even more rigorous than the Base Workshop overhaul standard.

Just ask yourself this. How did the Armourers clean and view the bore if they couldn't get the bolt out. And how did they check fire it if they couldn't get the bolt IN? After all, they need the sights to aim at the zeroing screen!