This is the only place on the internet ive seen to get the opscore amp arms. They indicated instock before adding to the cart. After placing order, the item was shipped out the next day . Super quick for being in the Christmas holidays. Zero complaints. As far as the product, the amps arms are amazing. Super stout and modular. Frees up the upper rail on your helmet set up. Gives you 360 degrees of travel in any direction to stowe your mounted ear pro. The compression when pressed on your ear is very secure. Makes the helmet feel more as one. The arms are high quality and built to last for the most rigorous users. I would buy again if i was rich. Thanks arms unlimited for getting me an item not in stock with a 1-16 week lead time at opscore in a short amount of time.