Barrel Extension +50 mm Gemini 12 Gauge Mobilchoke model for hunting and clay shooting shotguns.
Note: This product is a 'barrel extension' ONLY for shotguns with a Mobilchoke System. Mobilchokes are sold separately.
For shotguns: Beretta, Benelli, Breda, Bernardelli, Franchi, Bettinsoli, Chapuis Armes, Stoeger, Mossberg, Legacy, Stevens, Smith & Wesson, Charles Daly, Traditions, Tri Star, Laurona Zabala, Huglu , Century Arms, Ata Arms, CZ USA, Armed, Kral, Derya Arms, Brixia Shotguns, Zabala, Khan, Rfm, Kofs, BSA, Tikka, Savage, DeHaan, Weatherby, Doruk ( Eternal Arms ).
42CrMo4 Alloy Steel, Nickel-Plating+DLC
Approximately 80% of Gemini choke tubes are made of 42CrMo4 alloy steel (EN 10083-3), which is the most widely used steel in this field thanks to it’s excellent quality/price ratio. This material shows off a hardness ranging from 800 to 900 N/mm2, with the right balance between hardness, mechanical strength and toughness. It is also “normalized”, meaning the steel undergoes a specific heat treatment that allows it to achieve a perfect microstructural equilibrium. The pieces, once finished, are subjected to Nickel-plating for internal choke tubes or Nickel-plating+ DLC (Diamond Like Carbon) for all other models.
