The latest generation style bolt head machined from ordnance grade steel and properly heat treated. Perfect for all 556/ .223 & 300 BO roller lock firearms. This is a complete bolt head, ready to be used. We use the Upgraded Gen 1 Roller Retainer spring.

Compatible with:

• HK 93, 33. 53
• C93, C53, V53, 300 BO
• Clones or other custom builds