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Current Caliber none
Caliber
Current Gas Port Position none
Gas Port Position
Current Gas Block none
Current Gas Block
Current Brass Deflector none
Current Brass Deflector
New Caliber none
New Caliber
New Gas Port Position none
New Gas Port Position
New Barrel Length none
New Barrel Length
New Barrel Contour none
New Barrel Contour
New Gas Block none
New Gas Block
New Barrel Twist none
New Barrel Twist
New Muzzle Device none
New Muzzle Device
New Oprod none
New Oprod
New Gas Tube none
New Gas Tube
New Brass Deflector none
New Brass Deflector
Total: