Machined from ordnance grade steel. Correct heat treat and tungsten filled. The new RCM HK53 style Carrier is the finest US made Carrier ever. With the latest & greatest German inspired improvements and updates. Ideal for 556/.223 & .300 Black Out firearms. A bonus as each bolt counts as 1 US made compliant part.

Fits all:

• HK53
• Custom HK53 builds & clones
• .300 BLK builds