The Gretchin fired again and again as the Vostroyans rushed forward, but the weight of their pistols made it difficult for them to aim properly. Even so, given the volume of fire they loosed at the charging men, it was inevitable that some shots would find their marks. The Vostroyan's cherished carapace armour saved their lives, absorbing most of the impacts form those shots, even at close range.

Imperial Guard Omnibus Volume 1 pg. 708