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- Manufacturer: Springfield
- Model Number: ST916556BMA
- Caliber: 5.56mm NATO
- Barrel: 16 Inch
- Overall Length: 32.25-35.5 Inches
- Weight: 6.11 lbs
- Upper Receiver: Forged 7075 T6 Aluminum; Type III Hardcoat Anodized; Forward Assist; M4 Feed Ramps
- Lower Receiver: Forged 7075 T6 Aluminum; Type III Hardcoat Anodized; Accu-Tite Tension System
- Gas System: Direct Impingement Mid-Length
- Sights: Low Profile Flip-Up Dual Aperture Rear
- Pistol Grip: Bravo Pistol Grip
- Handguard: BCMGUNFIGHTER PKMR; M-LOK
- Stock: Bravo Company 6 Position
- Receiver Extension: Mil-Spec
- Bolt Carrier Group: M16 with Carpenter 158 Steel Bolt; HPT/MPI; Melonite
- Magazine: (1) 30+1 Round Magpul PMAG Gen M3