Boyds Hardwood Gunstocks Varmint Thumbhole CZ 557 Sporter Detachable Box Magazine Long Action Factory Barrel channel Forest Camo Finished. Typically these stocks are installed with two screws as supplied with the rifle. Thumbhole rifle stocks generally have two vertical grip positions that can be adjusted. These stocks have a channel that is the same inside diameter as the original magazine housing of the rifle. Thumbhole rifle stocks normally have two or three notches on the upper sprue to adjust the cheek rest to any position the shooter finds comfortable. These stocks attach to the gun with sturdy twin bolt clamps that provide great support and sure clamping to hold the rifle securely no matter the brand of action or optic being used. Specifications for Boyds Hardwood Gunstocks Varmint Thumbhole CZ 557 Sporter Detachable Box Magazine Long Action Factory Barrel Channel Stock: Manufacturer: Boyds Hardwood Gunstocks Gun Model: Cz 557 Sporter Condition: New Package Contents: Boyds Hardwood Gunstocks Varmint Thumbhole CZ 557 Sporter Detachable Box Magazine Long Action Factory Barrel Channel Stock What firearm models does the manufacturer say Boyds Hardwood Gunstocks Varmint Thumbhole CZ 557 Sporter Detachable Box Magazine Long Action Factory Barrel Channel Stock is compatible with? The manufacturer says that Boyds Hardwood Gunstocks Varmint Thumbhole CZ 557 Sporter Detachable Box Magazine Long Action Factory Barrel Channel Stock is compatible with Cz 557 SporterBoyds Hardwood Gunstocks 1MA66101L110: Varmint Thumbhole CZ 557 Sporter Detachable Box Magazine Long Action Factory Barrel channel Forest Camo Finished