The LPM Baby Bell is Liberty Precision Machine's 9mm-caliber muzzle brake - the compact companion to the .30-caliber Liberty Bell. It's precision-machined from 17-4 PH stainless in a single setup for concentric alignment, threaded 5/8x24 for the standard 9mm host pitch, and cut with a .395" bore that clears 9mm and smaller projectiles. Port geometry redirects gas laterally to trim muzzle rise on pistol-caliber carbines and 9mm AR uppers. Specs & features: 17-4 PH stainless steel, CNC-machined in a single setup for concentricity 5/8x24 thread pitch - standard 9mm suppressor / brake pitch on PCCs and 9mm AR uppers .395" bore - 9mm Luger, .380 ACP, and smaller-caliber compatibility 13/16" hex flats for a clean wrench install .900"-24 suppressor-mount compatible - direct-thread suppressor swap without removing the brake Made in USA by Liberty Precision Machine Host-platform notes: The 5/8x24 pitch matches most 9mm PCCs (CMMG Banshee, Foxtrot Mike 9), 9mm-chambered AR uppers, and pistol-caliber bolt hosts running .30-caliber muzzle threads. On a lightweight pistol-caliber carbine the Baby Bell trades a portion of muzzle rise for a modest amount of side blast at the bench - expected on any pistol-caliber brake with this port pattern. Verify your muzzle thread pitch and bore diameter before install; use a crush washer or a shim set for timing. Suppressor compatibility: Use of a muzzle device may void the warranty policy of some silencer manufacturers - always confirm alignment before firing suppressed. Liberty Precision Machine LLC and 3CR Tactical are not liable for damage to third-party products caused by improper alignment or mounting.