Re: What bipod attachment is this? AICS
RogueHK, Thanks for your interest in our products, that spigot is our part number BT19.
jcvibby, for clarity, while the offering OSU is making looks to be a nice piece of kit and copies some features of our BT19, he is correctly not advertising it as a "Atlas spigot".
ckfishdive, Please ask your friend if he has/had the original BT19 without the tension knob. With the original BT19 we were always fighting tolerance issues from stock to stock so we resolved that by adding the tension knob. So if your friend has a original BT19, getting the V2 spigot resolves this. If he has a BT19 with the tension knob, and when it is tight, it is loose, then the spigot is defective and we'll replace it.
Last, if anyone is interested, our part # BT20B is a rail that attaches to the bottom of the BT19 so any rail mounted bipod can be attached including the Atlas BT10 and BT10-LW17.