The M4A4 | Dark Blossom is one of 246 other Rifle skins. The rarity of the skin is Industrial Grade, which makes the Dark Blossom a rather common occurrence in the game.
The Sticker | Mahjong Fa is one of 6,088 other Sticker items. The rarity of the item is High Grade, which makes the Mahjong Fa a pretty common drop with an estimated drop chance of 79.92%.