Delta Optics Stryker HD Rifle Scope in 4.530x56 , First Focal Plane Scope. Available in 550x56 SFP also. Best budget Tier 1 Rifle Scope. Check all my best rifle scope reviews . And make sure and visit EDGUNWEST at the following link . https://www.edgunwest.com/
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Here are the specs for the Delta Stryker HD rifle scope

Delta Stryker HD 4.530X56 FFP
$1,599.00
Perfect riflescope with a reticle in the first focal plane for precise shooting at medium and long distances Optical design comprising of carefully selected ED glass provides excellent image quality and impressive light transmission, special antireflective coatings and illuminated central target point allow to fire an accurate shot even in low light conditions. Sleek and robust 34 mm tube provides with an extensive range of vertical reticle adjustment reaching 300 cm. Open turrets equipped with a ZeroLock mechanism which allows setting the limit for elevation usually after zeroing the riflescope at preferred shooting distance. The lock allows the shooter to make corrections only in elevation and prevents lowering the point of impact below the userdefined limit. Despite these advanced functionalities the riflescope weighs only 1014 g, and its length does not exceed 365 mm.
Reticles have been explicitly designed to work in the first focal plane (FFP), maintaining permanent dimensions throughout the whole zoom range. Reticles LRD1P, LRD1T, and DLR1 are genuinely unique and dedicated to any ambitious shooters. These are milliradians reticles (MIL), and so any corrections can be applied using metric units (1 Mil = 100 mm @ 100 m). Reticles correspond with the click of the scope 1click equals 0.1 MIL (10 mm). All three reticles provide with maximum comfort of use and accuracy of the shot with great proven functionality throughout the whole zoom range (4.530x). The oneofakind design of the reticles allows for measuring the distance to an object of known size, as well as elevation and windage correction. The vertical adjustment range of each reticle reaches 300 cm, facilitating shots of any caliber, even at very long distances.
LRD1T reticle
This one is an extension of the LRD1P reticle and additionally equipped in the lower part with ballistic markings for quick and easy adjustments to the projectile drop and windage correction and derivation.
LRD1P reticle
The center of the reticle is an illuminated 0.045 Mil target point with surrounding, welllighted markings that form the cross.
DLR1 reticle
Central illuminated dot has a diameter of 0.07 Mil (7 mm). Thin crosshairs of just 0.05 Mil (5 mm) with thick 0.4 Mil (40 mm). Posts of the crosshairs. Crosshairs are divided by distinctive markings into lengths of 0.2, 0.5 and one mil (25, 50 and 100 mm respectively). Moreover, this reticle has a useful additional crosshair which allows for accurate measurement of the target in the upper magnification range with an accuracy of up to 0.1 miles (10 mm)


Series :Stryker HD
Magnification [x]:4,530
Objective diameter [mm]:56
Reticle:LRD1T, LRD1P, DLR1
Illuminated reticle:Yes
Angular field of view [degrees]:4,720,71
Linear field of view at 1000m [m]:8,31,2
Exit pupil [mm]:8,81,9
Eye relief [mm]:8197
Water resistance:0,3kg/cm2
Weight [g]:1 014
Length [mm]:365
One click:0,1 MIL (1 cm @ 100m)
Max. elevation / windage adjustment range :30/15 MIL
Tube:34 mm (1 piece)
Parallax adjustment:Side focus (23 m ∞)
Reticle position:First focal plane(FFP)
Functional temperature range [°C]:20 — +71
Nitrogen filling:Yes
Remarks:ZeroLock