• Increases the magazine size of all weapons by 50%. Does not affect [Raiden Coil] .
• Does not affect guns with only one round in each magazine, as numbers are rounded down. In Exit The Gungeon, this effect is removed and single-round guns do gain an extra bullet.

• Alternative Rock - If the player has [Face Melter] , instead of firing four streams, [Face Melter] fires two parallel columns of notes. Reloading fires a guitar pick with a chance to stun.
• Dr Worm - If the player has [Heck Blaster] , its ammo automatically replenishes slowly.
• Hegemony Special Forces - If the player has [Hegemony Rifle] , it fires piercing lasers.
• Keeping The Beat - If the player has [Metronome] , it grants +4% damage per kill instead of +2%, and maxes out at +250% damage instead of +150%.
• M1 Multi-Tool - If the player has [M1] , decreases [M1] 's reload time by 20% and increases its magazine size, and maximum ammo. Increases movement speed while [M1] is held.
• Not Quite As Mini - If the player has [Vulcan Cannon] , its maximum ammo is increased by 100 and its fire rate greatly increases.
• Magazine Clips - If the player has [Magazine Rack] , [Magazine Rack] 's radius roughly doubles.
• Drum Clip can negatively affect weapons that have special effects on the final shot, such as [Eye of the Beholster] .
• If duplicates of this item are somehow obtained, further increases guns' magazine size. Doesn't affect guns with one round.

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