Description
Rifle Scope Product Details
Sightmark 1-4×20 SCR-300 Riflescope
The nitrogen-filled, IP67 waterproof, shock proof, fog proof Sightmark 1-4×20 scr-300 riflescope gets you on target with precision optical quality packed in an elite, compact body. Built specifically for modern sporting rifles chambered in .300 AAA Blackout, with a rugged 6061-T6 30mm tube and scaled perfectly for lightweight, fast-action professional and competition shooting, the riflescope boasts an scr-300 finely etched reticle, complete with red-illumination and calibrated subtension lines for .300 Blackout bullet drop compensation. 10 reticle illumination brightness settings provide the intensity for daylight to no-light shooting. The generous 4.5″ eye relief provides shooters with a robust field of view while an advanced, fully-multicoated, scratch resistant lens system, 1-4x magnification and an easy-to-focus rapid power rotation eyepiece work together to give razor sharp, Lightning quick target acquisition. Whether your rifle is all business, all competition or all fun, exposed pop-up locking turrets deliver precise 1/2″ per click windage and elevation adjustments for superb tracking. The Sightmark 1-4×20 scr-300 riflescope is the perfect close- to mid-range second-focal-plane-optic to make your mark.
Rifle Scope Product Features
Precision, compact .300 blackout-calibrated Riflescope
Generous 4.5in Eye relief
Exposed pop-up locking turrets
Rapid rotation Eyepiece
Calibrated .300AAC Blackout BDC sub tensions
Sightmark SCR-300 Riflescope
Features
BDC reticle calibrated for .300BLK 110 and 120 grain
Exposed, pop-up locking turrets
Rapid Power Rotation eyepiece
Digital reticle illumination
Generous 4.2″ eye relief
Side focus adjustment for parallax removal
Fully multi-coated optics
Single-piece, 30mm tube
What comes in the box
Sightmark Riflescope
CR2032 Battery
Lens cover
Lens cloth
Sightmark SCR-300 Riflescope
Sightmark Riflescopes target the leading edge of premium, tactical operation optics. Whether your work, competition or passion keeps you going with a modern sporting rifle at the ready, you can depend on the same demanding Sightmark quality you have come to expect in our riflescope lineup.
Built as tough as the professionals who trust Sightmark performance to get them back home to their families after a long, high-stakes day, Sightmark Riflescopes boast rugged yet lightweight, compact hard-anodized 6061-T6 aluminum tubes; premium, fully multi-coated lenses; digital reticle illumination; generous eye relief; rapid power rotation eyepiece; ultra-reliable shockproof, fogproof and IP67 waterproof performance.
Illumination Control
Press the digital illumination switch to turn on reticle illumination. To cycle through the brightness settings, press the digital switch consecutive times until the desired brightness level is reached. Settings 1 through 8 are best for daytime use. Settings 9 and 10 are best for low light use. To turn off the reticle illumination, press and hold the digital switch for 3 seconds.
SCR-300 Reticle
The Scythe reticles are calibrated for .300 Blackout 110gr. and 120gr. The duplex reticles are designed for hog hunting with a 100 yard zero. The design provides a fine central aiming crosshair at higher magnifications and holdovers. Those respective holdovers were designed to coincide with the average length of hog, allowing for ranging of your target.
Whole Eyepiece Rotates
Each variable power riflescope is equipped with the rapid power rotation eyepiece. By rotating the entire eyepiece, the magnification will change. This design allows the user to grab any part of the eyepiece to quickly change magnification. The magnification levels are noted on the front of the eyepiece. To increase magnification, turn the eyepiece clockwise. To decrease magnification, turn the eyepiece counter-clockwise.
1-4×20 SHR-223 Riflescope 1-4×20 SCR-300 Riflescope 3-12×32 SHR-223 Riflescope 3-12×32 SCR-300 Riflescope 5-20×40 SCR-308 Riflescope Sightmark 2.5×20 Scout Scope
Magnification (x) 1-4 1-4 3-12 3-12 5-20 2.5
Objective lens diameter (mm) 20 20 32 32 40 20
Parallax setting (yds) 100 100 100 100 25 – 50
Battery type CR2032 CR2032 CR2032 CR2032 CR2032 CR2032
Focal plane 2nd 2nd 2nd 2nd 2nd 2nd
Length/Width/Height (in) 8.7 x 2.9 x 2.2 8.7 x 2.9 x 2.2 11.6 x 2.9 x 2.2 11.6 x 2.9 x 2.2 12.8 x 3.6 x 2.2 7.6 x 2.4 x 1.7
Weight, oz 19.2 19.2 20.8 20.8 23.6 11.8
Reticle SHR-223 SCR-300 SHR-223 SCR-300 SCR-308 TDR
About the Sightmark Manufacturer
Sightmark is a premium manufacturer for weapon scopes, optics, mounts, and other add-ons used for guns like rifles and long guns. They innovate and manufacture their products by choosing building materials which are long lasting and durable. This includes the Sightmark 1-4×20 SCR-300 Riflescope by Sightmark. For more shooting products, visit their website.
What You Need to Know About Glass
Rifle scopes allow you to specifically aim a rifle at different targets by aligning your eye with the target at range. They do this through magnification by using a series of lenses within the scope. The scope’s positioning can be adapted to take into account various natural elements like wind and elevation to make up for bullet drop.
The scope’s function is to help shooters understand exactly where the bullet will land based on the sight picture you are viewing via the scope as you line up the scope’s crosshair or reticle with the intended point of impact. The majority of modern-day rifle optics have about 11 parts which are arranged internally and on the exterior of the optic. These parts consist of the rifle scope’s body, lenses, elevation dials, focus rings, and other elements. Learn about the eleven parts of rifle scopes.
About Rifle Scope Types
Rifle scopes can be either “first focal plane” or “second focal plane” type of scopes. The sort of focal plane a scope has decides where the reticle or crosshair is located in relation to the scopes zoom. It actually implies the reticle is situated behind or in front of the magnifying lens of the optic. Choosing the most ideal style of rifle optic depends on what type of shooting you intend on doing.
Info About First Focal Plane Glass
First focal plane scopes (FFP) feature the reticle in front of the zoom lens. This triggers the reticle to increase in size based upon the level of zoom being used. The benefit is that the reticle measurements are the same at the amplified range as they are at the non magnified distance. As an example, one tick on a mil-dot reticle at 100 yards without “zoom” is still the exact same tick at 100 yards with 5x “zoom”. These kinds of scopes work for:
- Quick acquisition, far away types of shooting
- Shooting circumstances where computations are low
- Experienced shooters who have an idea for their target “hold over” and “lead” relationships for their rifles
- Shooters who don’t mind the reticle is enlarged and requires more visual eyesight space than a SFP reticle
About Second Focal Plane Glass
Second focal plane scopes (SFP) come with the reticle behind the zoom lens. In the FFP example with the SFP scope, the 5x “zoom” one hundred yard tick measurement would be 1/5th of the non “zoom” tick measurement.
- Long distance styles of shooting where shooters have additional time to make ballistic calculations
- Shooting where most shots happen within much shorter proximities and ranges
- Shooters who choose a clearer optic picture without room used up by the bigger FFP reticle
Ins and Outs of Glass Zoom
The quantity of scope zoom you need on your scope is based on the sort of shooting you choose to do. Just about every style of rifle glass gives some level of zoom. The quantity of magnification a scope gives is determined by the size, density, and curves of the lens glass within the rifle optic. The magnification of the scope is the “power” of the glass. This implies what the shooter is aiming at through the scope is magnified times the power factor of what can normally be seen by human eyes.
Info About Single Power Lens Optics
A single power rifle scope or optic uses a zoom number designator like 4×32. This means the magnification power of the scope is 4x power while the objective lens is 32mm. The magnification of this kind of optic can not fluctuate given that it is a set power scope.
Adjustable Power Lens Optics
Variable power rifle scopes can be adjusted between magnification power levels. These types of scopes will note the magnification amount in a configuration like 2-10×32. These numbers mean the zoom of the scope could be adjusted between 2x and 10x power. This also utilizes the powers in-between 2 and 10. The power adaptation is accomplished by making use of the power ring part of the scope near the back of the scope by the eye bell.
The Power and Range of Scopes
Here are some suggested scope power levels and the ranges where they may be efficiently used. High power rifle scope glass will not be as effective as lower magnification rifle scope glass since too much magnification can be a bad thing. The same idea goes for extended ranges where the shooter needs to have sufficient power to see precisely where to best aim the rifle.
Lens Covering for Rifle Glass
All cutting-edge rifle scope and optic lenses are coated. Lens finish is an essential aspect of a shooting platform when looking into high end rifle optics and scope setups.
HD Versus ED Lens Coatings
Some scope brands likewise use “HD” or high-definition lens finishes which use different techniques, polarizations, aspects, and chemicals to draw out different colors and viewable quality through the lens. Some scope makers use “HD” to refer to “ED” implying extra-low dispersion glass.
Rifle Glass Lens Single Finish Versus Multi-Coating
Different optic lenses can likewise have different finishings applied to them. All lenses usually have at least some type of treatment or finish used to them prior to being used in a rifle scope or optic.
This lens treatment can offer protection to the lens from scratches while reducing glare and other less beneficial things experienced in the shooting environment while sighting in with the scope. The quality of a single covered lens depends on the scope producer and how much you paid for it.
Some scope producers also make it a point to define if their optic lenses are layered or “multi” coated. This indicates the lens has several treatments applied to the surfaces of the glass. If a lens receives several treatments, it can establish that a maker is taking numerous actions to combat different natural factors like an anti-glare covering, a scratch resistant anti-abrasion coating, followed by a hydrophilic finishing. This also doesn’t necessarily imply the multi-coated lens is much better than a single coated lens. Being “much better” depends on the producer’s lens treatment technology and the quality of products used in creating the rifle scope.
Hydrophobic Lens Finish
Water on a scope lens does not improve retaining a clear sight picture through an optic at all. Many top of the line and premium optic producers will coat their lenses with a hydrophilic or hydrophobic covering. The Steiner Optics Nano-Protection is a good example of this sort of treatment. It treats the exterior of the Steiner optic lens so the water particles can not bind to it or create surface tension. The outcome is that the water beads roll off of the scope to preserve a clear, water free sight picture.
Options for Installing Rifle Glass on Firearms
Installing solutions for scopes are available in a few options. There are the standard scope rings which are individually mounted to the scope and one-piece scope mounts which cradle the scope. These various kinds of mounts also normally can be found in quick release versions which use throw levers which permit rifle shooters to quickly mount and dismount the scopes.
Hex Key Rifle Scope Ring Mounts
Basic, clamp type mounting optic rings use hex head screws to install to the flattop style Picatinny scope mount rails on the tops of rifles. These forms of scope mounts use double independent rings to support the optic, and are normally constructed from 7075 T6 billet aluminum which are manufactured for far away accuracy shooting. This kind of scope mount is ideal for rifle systems which need a durable, rock solid mount which will not shift despite how much the scope is moved about or jarring the rifle takes. These are the type of mounts you should get for a faithful scope system on a far away scouting or tournament rifle that will rarely need to be altered or adjusted. Blue 242 Loctite threadlocker can additionally be used on the mount’s screws to stop the hex screw threads from wiggling out after they are installed firmly in place. An example of these mounting rings are the 30mm style from the Vortex Optics company. The set normally costs around $200 USD
Scope Mounting Solutions with Quick-Release Cantilever Rings
These types of quick-release rifle scope mounts can be used to rapidly connect and detach a scope from a rifle. If they all use a similar design mount, multiple scopes can also be switched out in the field. The quick detach design is CNC crafted from anodized 6061 T6 aluminum and the mounting levers connect securely to a flat top type Picatinny rail. This enables the scope to be sighted in while on the rifle, taken off of the rifle, and remounted back on the rifle while preserving accuracy. These types of mounts come in convenient for rifles which are transported a lot, to take off the scope from the rifle for protection, or for sight systems which are used between a number of rifles. An example of this mount style is the 30mm mount designed by Vortex Optics. It normally costs around $250 USD
Rifle Scope Tube Sealing and Gas Purging
Wetness inside your rifle scope can ruin a day of shooting and your expensive optic by causing fogging and producing residue within the scope’s tube. The majority of optics protect against humidity from getting in the scope tube with a series of sealing O-rings which are waterproof. Generally, these water-resistant scopes can be immersed beneath 20 or 30 feet of water before the water pressure can force moisture past the O-rings. This should be more than enough wetness prevention for conventional use rifles, unless you intend on taking your rifle aboard watercrafts and are worried about the scope still performing if it goes over the side and you can still find the firearm.
Gas Purged Rifle Glass Tubes
Another component of avoiding the accumulation of wetness within the rifle optic tube is filling the tube with a gas like nitrogen. Since this area is currently taken up by the gas, the optic is less altered by temp shifts and pressure differences from the outside environment which might possibly allow water vapor to seep in around the seals to fill the vacuum which would otherwise exist. These are good qualities of a good rifle scope to seek out.
