A few rounds from a Barrett .50 cal. I believe this is the Barrett Model 82A1.
Barrett Model 82A1 Specs:
- Caliber: .50 BMG
- Barrel Lengths: 29 in (73.7 cm) / 20 in (50.8 cm)
- Barrel Twist: Right, 1 in 15″ (38 cm)
- Weights: 30.9 lbs (14.0 kg) (w/ 29 in barrel) / 29.7 lbs (13.5 kg) (w/ 20 in barrel)
- Length Assembled: 57 in (145 cm) (w/ 29 in barrel) / 48 in (122 cm) (w/ 20 in barrel)
- Front Sight: .070 inch flip up. (1.78 mm) wide post
- Rear Sight: .065 inch flip up. (1.65 mm) aperture, 1500 meter adjustable
- Sight Radius: 23.3 inches (59 cm)
- Scope Rail: 24 inches (61 cm) long