Valken Proton - LE Red/Grey Airsoft Gun Parts & Upgrades They are the most durable

They are the most durable of all airsoft guns because they have less pieces that can break

Reduced silhouette compares to the Pro-Flex for fewer hits

The G4 includes a new

this rigid

Both high and low pressure rupture disks installed for highest level of safety

Valken Proton - LE Red/Grey Airsoft Gun Parts & Upgrades They are the most durableFeatures NEW for 2015 5 Firing Modes & 4 Tourney Modes Break beam Eyes w Eye Shields Super Easy To Maintain Tool less Engine Disassembly Recurve Trigger & Roller Bearings Redesigned Grip Frame Aggressive Body Milling And Styling Autococker Barrel Threads Cam lock Clamping Feed Neck On Off ASA w Purge