This upgrade kit from Bravo will upgrade either of the Bravo BV3 or BV7 airsoft sniper rifles to approximately 500-515FPS. These will also fit the WELL MB03 and MB07, and may fit other VSR-10 clones .
This kit includes a metal piston, metal bearing spring guide, and the upgraded spring. These metal upgrade parts are an excellent step up from the original plastic internals on some airsoft sniper rifles.
When installing a power upgrade kit in any airsoft bolt action rifle upgrading the sears to better handle the additional stress is highly reccommended.