The Ruger AR-556 MPR 450 Bushmaster magazine is a factory 5-round magazine designed specifically for Ruger AR-556 MPR rifles chambered in 450 Bushmaster.
- Type: Factory magazine
- Compatible Firearms: Ruger AR-556 MPR 450 Bushmaster
- Capacity: 5 rounds
- Material: Steel body, polymer follower
- Features: Witness holes
- Use: Hunting, compliance with capacity restrictions
