ASG Olsztyn checks out the East Crane EC-901 AEG, a semi-auto DMR that can be found at airsoft retailers in Europe. The EC-901 is said to be ready to use right out of the box. It is easy to upgrade to a full DMR with increased FPS by simply swapping the spring. The EC-901 is compatible with Tokyo Marui AEG spec parts, which are widely available in the aftermarket.