This is the new version of the Delta Stryker Target Ultra ED 5-50x56 HD SFP Illuminated Rifle Scope, featuring a new and improved locking turret design (as seen in the pictures).

• The Delta Stryker Target Ultra ED 5-50x56 is designed around a 34mm tube with superior ED glass at the center. The ED / HD glass system found within the Delta Stryker Target Ultra ED 5-50x56 is the same glass system that helped to secure the Delta 2.5-15x56 HD a solid reputation that offered not only superb optical quality but great value for money, the Delta 5-50x56 HD is no different.
• The Delta Titanium Stryker Target Ultra ED 5-50x56 has been designed with not only the long-range precision shooter in mind but also Field Target air rifle shooters who require some of the best glass in the world, which offer depth of field, range finding capabilities and superb tracking. The versatile 5-50x magnification paired with a side focus system allows you to get up close and personal right down to 10m @ 50x magnification yet still have an infinite parallax setting (so parallax can be dialled out at extreme ranges).
• The 34mm tube of the Delta Stryker Target Ultra ED 5-50x56 gives the user an impressive 100 MOA of internal elevation adjustment really making this a scope that is actually capable of hitting 1000 yards easily when paired with the right caliber and mounting system. The open turret design of the Delta Ultra ED is equipped with a Zero Lock mechanism that will allow you to return back to your chosen zero range without the problem of dialling down past it.
• The click value of the Delta Ultra ED is 0.1 MIL, which is paired with the milliradian based reticles of the Delta Ultra ED, the DLS-1 & DLS-2. The metric system of Mil is as follows; 1 MIL = 100 mm @ 100m, the reticles have been designed to correspond with the click of the scope - 1 click = 0.05 MIL (5mm).
• The Delta Stryker is also available in 1/8 MOA clicks when paired with the DLS-3 Reticle which is a simple yet effective MOA spaced reticle that subtends correctly on 40x Magnification. 
• The Delta Titanium Ultra ED 5-50x56 HD features a Second focal plane reticle that is equipped with a central illuminated point system for quick target acquisition when shooting in low light or against dark backgrounds.