You might have covered the AK-47's at the prematch stud check. Bit embarrassing if you only notice that dangerous bit of metal late in the game, especially if his opponents failed to break thru' his " defense" earlier on in the game. Bullet ridden cadavers should serve you as a "heads up" in future matchs of this sort...
That of any loud statico sounds from either wing. Obviously any 100 round drums should be confiscated before kick-off.
With the way RSA is heading, perhaps WR might like to add this to the LoTG, to protect travelling Pro14 sides.