This is a Bootleg Charging Handle, model BP-CH.
If you've been hunting for the best charging handle" look no further! Bootleg" Inc. produces the best AR accessories and custom AR parts" and the 5.56 Charging Handle is no different. It is made from 7074 aluminum and Type III hard anodized to keep it light but durable.
Features:
Made from 7074 aluminum
Type III hard anodizing for full coverage and durability