Poorly made butt stock - Sniper Advanced Carbine Collapsible Butt-Stocks

Put this on a Sniper 6 position commercial buffer tube. The front of the stock fits the buffer tube. The rear of the stock does not fit on the buffer tube. The inside diameter of the front of the butt stock is 1.168 inches. The inside diameter of the rear of the butt stock is 1.148 inches. As a result the butt stock will not close all the way. The outside diameter of the buffer tube at the butt stock end is 1.168 inches. The inside diameter of the butt stock should be the same from front to rear. Poor quality control. Do not buy anything made by Sniper.