This is a BLACKHAWK Bipod, model 71BP02BK.
This Blackhawk Sportster Adjustable Bipod features a proven" time tested design for field or benchrest shooting and has a compact and lightweight design. It has no-rust anodized legs with increased spring tension and spring-return telescoping legs- 9" to 13". Easily attaches to sling swivel.
Features:
Compact and lightweight design
No-rust anodized legs with increased spring tension
Unshakable prone and bench shooting
Adjustable 9-13