Top takeaways
- The BCM MK2 Receiver Extension is compatible with AR15, M16, M4 and most AR-10s, machined from 7075T6 to Mil-Spec dimensions.
- It requires a M16 rifle action spring and a specific BCM MK2 buffer; standard carbine and rifle buffers are not compatible.
- The extension is hard coat anodized to Mil-A-8625F, Type III, Class 2 standards, and fits stocks made to Mil-Spec size.
Attributes
- Style:
Mil-Spec
- Weapon type:
AR-15
- Delivery weight: 0.227kg
- Shipping height: 57mm
- Shipping width: 57mm
- Shipping length: 330mm
- UPC: 812526023599
Item details
US export classification: 0A501.y.1




