Barrel centering insert for you LCT AS VAL/VSS supressor. It's a spring based structure, you can slide it into the supressor from the receiver end. Will keep your inner barrel nicely and consistently in the center, increasing accuracy. Comes with 2 quantity. Shipping is standard flat rate shipping cost for me I do not up charge on shipping if need more then one please buy multiple at the same time. All items are 1 year warranty no questions asked if fail just need a picture of broken item and new one will be shipped for free.