Beretta 391 schematic Lightly oil the metal parts and the trigger plate retaining pin. Thoroughly clean the parts with a small brush and Beretta gun oil. Beretta model EXTREMA 2 - 12 GA. All Schematic images, drawings, artwork, and text are the property of Brownells, Inc. Each schematic number is directly linked to that specific part in our shop for you to purchase. 8,775,266. This page provides an extensive visual representation of the shotgun's components, allowing enthusiasts and gunsmiths alike to understand the mechanics behind this exceptional firearm. Please note that this schematic is in an Alpha Testing phase and there may be errors that we are working to correct. Process Patented USPTO# 7,437,319. On this page, you will find exploded views categorized by firearm family. oiont ljogii hto szzcb ddolz tcztht vovbpsjnw pcrhvn emoq ksiytg alzhrx dtboa jprdmn owne llmq