Model N/AQuantity 1 piece(s) per packColor BlackMaterial PVCGun Type Suitable for 21mm bracket gunSuitable Caliber 21 mmSpecification Spring loaded bipod， durable & easy to takePacking List 1 x Tactical Hand Grip with Retractable Spring Bipod Stand for Gun - Black<img src="http://112.74.112.28/down/products/138500/138500_000.jpg" noproxy>