"The M93R can be modified with this."
After combining it with Claire Redfield's M93R Handgun, this part equipped the Handgun with a stock. It was found inside a Duralumin Case, the one found at the building behind the guillotine stand in Rockfort Island. It converted the Handgun into the Custom Handgun M93R Burst. With the new Custom Handgun, Claire could fire 3 bullets in succession.