Action Army T11-S Sniper Rifle PK250 They also use two O-rings

They also use two O-rings against the cylinder for an excellent air seal

Quick Response Short Stoke Trigger & Unique Trigger Guard

Leviathan - V2 optical can be used with any common gearbox upgrade and gun rate of fire

Based on the latest generation of pistols from CZ

- Full Metal Construction

Action Army T11-S Sniper Rifle PK250 They also use two O-ringsThe T11S is the newest sniper pistol from Action Army Company, and is a shortened version of the longer T11 sniper rifle. Renowned in the airsoft community for their sniper rifle upgrade parts, Action Army has taken their expertise and experience and applied it to a complete rifle. The internals and externals of the T11S pistol are all made to VSR 10 specifications, so it can accept any upgrades compatible with VSR 10 pattern bolt action sniper