Great stock, fits just as tight on a WE M4 CQBR as the original stock did. Feels very much like the Classic Army Crane stock, even includes fake LMT trades and a PAT#. Battery storage tubes in the stock itself and a plastic butt pad with a small (1/2) extension which can be removed.
Overall an amazing buy for it's price. Definitely meant for GBBR spec buffer tubes.