Brand: Unknown Concept

Model: AR15 Bolt Saver (Black Version)

Material: High-Impact Reinforced Polymer / Heavy-Duty Plastic Construction

Compatible with: AR-15 / M4 GBBR Series (VFC, GHK, TM MWS, etc.)

Weight: Approx. 20–30g

Dimensions: Custom-engineered for standard AR15/M4 upper receivers

System:The Unknown Concept AR15 Bolt Saver in Black (BK) is a sleek maintenance tool designed to secure your GBBR's Bolt Carrier Group (BCG) during transit and storage. It plugs directly into the rear of the upper receiver, locking the bolt carrier and charging handle firmly in place to prevent them from sliding out when the rifle is split open. The stealthy matte black finish provides a professional, low-profile appearance on the workbench while delivering reliable structural protection for your rifle's internal components.