Many times I've completed bounties to level a single weapon or piece of armor. Following this suggestion you can receive more class materials and weapon parts while completing the aforementioned task. When you’re running bounties only bring a few weapons and armor with you; leaving space to pick up as many uncommon items as possible. To obtain more weapon parts or class materials equip these uncommon (green) items while turning in bounties. Uncommon items level quickly (1 x 5000xp or 2x 2500xp bounties). Unequip these items immediately after leveling and dismantle (this may be in the midst of turning in bounties), equip another and repeat. Do not pay for the upgrades, just make sure all available perks are circled in green. You'll receive 3-5 weapon parts, or 3-5 class materials compared to 1or 2. Many Vets may already know this; but please notice, some amateurs might find it useful knowledge.