I bought two of these a couple years back and quickly realized I dont need more than one. I have this one sitting in my safe for maybe 5 or more years now. Its a 6" to 9" bi-pod and its spring loaded for easy/fast closing. It also attaches to a sling stud. I was thinking $30 face to face or I will ship it for $35. For a trade I would be interested in an AR lower parts kit. I am located in Tacoma.