Slong Airsoft got three different types of airsoft snipers based on the VSR-10 for you to choose from: TSR-100, WSR-100, and CSR-10. The CSR-10 is a more stripped down version; the TSR-100 is more full length version but it has CQB version; and the WSR-100 TSR-100 that has wood furniture. Below is the video showing how you can install the TDC Hop-Up Kit yourself and you can adjust it easily from the outside.