MJ Arsenal 4 Piece Grinder

The MJ Arsenal 4-Piece Grinder is a standard 4-piece aluminum grinder with the traditional disc profile, while the Capsule is a cylindrical all-in-one system that combines a fluted rotor mill, a spring-loaded brass dugout, and a storage chamber in a tubular form factor. The 4-Piece uses traditional precision-cut teeth and includes a kief catcher, while the Capsule uses a fluted rotor mill and does not include a kief screen. The 4-Piece is better suited for users who want a conventional disc-style grinder with kief collection. The Capsule suits users who want a complete portable system with a built-in dugout one-hitter for on-the-go consumption.

The 2.2-inch diameter places the MJ Arsenal 4-Piece Grinder between the most compact 2-inch models and the more common 2.5-inch standard size. It is small enough to fit comfortably in a jeans pocket and carry discretely without the bulk of a larger grinder, while still providing more grinding surface area and storage capacity than a 2-inch model. This makes it a practical compromise for users who find 2.5-inch grinders slightly large for their preferred carry style but find 2-inch grinders too small for their typical session quantity. The 2.2-inch size also holds enough ground herb for two to three sessions per load for most users.

Yes. The 4-piece construction includes a fine mesh screen and a dedicated pollen catcher chamber at the base. As ground herb sits in the storage section during normal use, fine trichome particles pass through the mesh screen into the kief chamber below. Over multiple sessions, a usable supply of kief accumulates that can be collected with a scraper tool and added to bowls or joints for an enhanced session. The 2.2-inch diameter produces a moderate amount of kief per session, building to a visible supply over the course of regular use.

The precision-cut teeth in the MJ Arsenal 4-Piece Grinder are machined to consistent dimensions that produce an even, medium-fine grind with each session. This consistency suits a wide range of consumption methods: rolling joints and cones, packing hand pipes and bowl pieces, loading water pipes, and loading most dry herb vaporizer chamber types. The fine mesh screen ensures that only herb at or below the appropriate particle size passes through to the collection chamber, retaining oversized chunks in the grinding section for additional grinding.

Yes. The MJ Arsenal 4-Piece Grinder is made from aluminum with the precision machining that MJ Arsenal applies across their product line. Aluminum grinders are resistant to everyday impacts, resist corrosion from humidity and cleaning agents, and maintain their grinding performance over extended periods of regular use. MJ Arsenal’s manufacturing standards are associated with quality glass water pipes and dab rigs, and the same quality approach carries into their grinder line. The magnetic lid and threading are designed to maintain their function over long-term daily use.

Separate all four pieces by pulling apart the magnetic lid and unscrewing the two lower sections. Use a small brush to clear loose herb from the teeth, chamber walls, and mesh screen. Soak the aluminum components in isopropyl alcohol for 20 to 30 minutes to dissolve resin. Brush away dissolved residue, paying attention to the mesh screen and the spaces between the grinding teeth. Rinse with warm water and dry completely before reassembling. Collect any accumulated kief from the bottom chamber with a scraper before soaking, as the isopropyl alcohol will dissolve it during the soak.