Gamo GX-40 is an Ultra-quiet Pre charged pneumatic air rifle Gamo’s GX-40 is a 16 Joules compact and accurate air rifle which features a last generation precharged pneumatic air system (PCP). Gamo’s last generation PCP system provides a smooth, powerful and accurate shooting due to its sophisticated compression system, which supplies a constant air feed that efficiently boosts pellets of all calibers. This state of the art technology consists on a strengthened steel air cylinder which is able to deliver high power levels by using a mechanic opening valve. This outstanding airgun is composed of a precise and reliable cold hammer forged barrel and a brand new ergonomic and adjustable polymer stock, which guarantees a perfect sight to target alignment.