Check the listing for details. Benjamin Trail NP Mark II Air Pistol .177. Condition: New. Listed at 152.95 USD. Benjamin Trail NP Mark II Air PistolNitro gas pistonBreakbarrelRifled steel barrelPicatinny rail under barrelSingle-shotFiber optic front and rear sightAdjustable, removable rear sight11mm dovetail railTactical, synthetic frameIncludes removable cocking aidUp to 650 FPS with alloy, 525 FPS with lead Here are the benefits of the Nitro Piston:Smoother cockingSmoother shootingNo spring torqueNo spring fatigue, even if you leave it cocked for hoursFunctions perfectly in cold weatherLasts longer than a metal spring # This listing complies with eBay’s air gun guidelines found here and I will only sell and ship air guns to buyers in jurisdictions where permitted by applicable laws {URL0}|PI_BLOCK_Airguns_BB_no_disclaimer_952593|952593|http://pages.ebay.com/help/policies/firearms-weapons-knives.html|http://pages.ebay.com/help/policies/firearms-weapons-knives.html|{URL0}