FN Ballista Caliber Conversion Kit, 300 WM 1:10" Twist Polygonal. Replace your worn accessory or keep as a backup. FN America factory accessories are made with the same quality materials that you have come to expect and trust from FN America.

Includes:

• 26" Fluted Barrel with 1:10" Twist Rate
• Black color
• Unique Alpine muzzle brake
• The 300 WM bolt head converts to bolt body to the new caliber
• A single 8-round magazine in Black is also included