6 Best Scopes For FN SCAR 17 & 20S [Updated 2021]

As optic technology improves, more and more better products are hitting the market.

We have used many optics on many different guns, and here are the best scopes for FN SCAR 17 to consider getting in 2021.

Whether you're shooting close range or long-range, we have picked out a few options and separated them into 3 categories:

  • Close range
  • Medium range
  • Long-range

Let's see what these optics can do for your SCAR...

6 Best FN SCAR 17 Optics 

Leupold MARK 6 3-18x44mm FFP TREMOR 2, Zero Lock M5C2 Riflescope 117876
Leupold MARK 6 3-18X44mm
  • Magnification & Glass:3-18X44mm, Second Focal Plane
  • Scope & Turret Profile:34mm, 23.6 oz, 0.1 MIL/Click
  • Benefits:
AimPoint Micro H-2, AR15, Red Dot Sight w/o Mount, 2 MOA, 200186
  • Features:1X fixed power reflex, Unlimited eye relief, 7075 T6 Aluminum housing, 0.5 MOA/Click
  • Benefits:Lightweight & low profile setup for run & gun, 2 MOA dot for CQB & Mid range precision shooting, Strongest combat optic even survives C4 explosion
Trijicon RM01 3.25 Red RMR Type 2 w/o Mount, Black, 3.25MOA, 700600
  • Features:1X fixed power reflex, 7075 T6 Aluminum housing, 1 MOA/Click
  • Benefits:Super lightweight & low profile setup cant shooting, 3.25 MOA dot for FAST ON TGT CQB shooting, 2 years of battery, Fast sights transition from magnified to 1X
Trijicon ACOG 3.5x35 Dual Ill Riflescope w/Mount, Green Crosshair .308 Reticle
  • Magnification:3.5X35mm
  •  Scope & MOA Profile: 7075 T6 Housing, 0.25 MOA/Click
  • Benefits:Longer eye relief than 4X32 ACOG, Rugged body withstands heavy recoil and impact, Standard issue combat optic for U.S. Military
U.S. Optics TS-6X Riflescope, 1-6x24mm, 30mm Tube, First Focal Plane, Digital Red Illuminated JNG MIL Reticle, Matte Black, TS-6X JNG MIL
US OPTICS TS 1-6X24mm[Illuminated MIL Reticle]
  • Magnification & Glass:1-6X24mm, First Focal Plane
  • Scope & Turret Profile: 30mm & 1/4 MOA/Click
  • Benefits:Rare 1/4 MOA turrets than any other LVPOs, Great for CQB & MID range hybrid shooting, 4mm exit pupil great for low light but not in complete darkness
BEST FOR THE MONEY & Performance
NightForce ATACR, 4, 16x42mm F1, ZeroHold Riflescope, .1 Mil, Radian, DigIllum, PTL, TReMoR3, C575


  • Magnification & Glass:4-16X50mm, First Focal Plane, Indestructible ED glass
  • Scope & Turret Profile: 34mm, 0.1 MIL/Click, 7075 T6 Body
  • Benefits: Shockproof performance on FN MK20S, ZeroTop turret for zero repeatability, 50mm objective lens for max light transmission under low light

Aimpoint Micro - Toughest CQB Red Dot

SCAR 17 with Aimpoint Micro and magnifier
Image Referenced TREX ARMS

Why Use The Aimpoint Micro - It's the king of the micro red dot for its superior durability, battery life, and accuracy. If you use your SCAR for pure CQB distance applications, this sight is right for you.

Built like a tank - 7075 T6 aluminum housing protects external and internal components to survive rough handling, physical abuse, sharp recoil and retain zero.

Precise Aim - Hit a 100 yrd IPSC size target within a 2 MOA circle using the precise 2 MOA size aiming dot, just point and shot.

Insane battery life - The sight is always ready, and  theuser doesn't have to switch out the battery at all for 4+ years. 

CQB & Mid Range - Turn your SCAR into a CQB & mid range combat machine by adding a red dot magnifier behind it for more magnification


  • Magnification: 1X
  • Eye Relief: Unlimited
  • Reticle Type: 2 MOA Red Dot
  • Turret : 0.5 MOA / Click
  • Length: 3.1 inches
  • Weight: 4.7 oz

Check Out: Best Red Dot Sight For Fighting Rifles

Trijicon RMR Type 2 - Best Offset Canted Shooting

scar 17s with trijicon rmr offset
Image Referenced TREX ARMS

Why You Need An Offset Sight ? If your SCAR is setup for long range application, but you still want 1X CQB capability with unrestricted eye box or eye relief. The offset Trijicon RMR red dot can do that for you while keeping it low profile.

Just Cant The Rifle - Cant the rifle at an angle to use the red dot, and cant back to get behind a magnified scope for long range shots.

Shoot Around Barricades - Shoot around barricades, corners or any improvised shooting without worry about eye box restriction

For Running & Gunning - Transition between CQB and long range in no time. Driving the muzzle to target fast with a wide field of view on 1X!

Near Infinite Battery life - 50,000 hours of battery life , and you don't have to worry about it running out of juice any time soon.

Superior Durability - Forged 7075 T6 aluminum housing unit divert impact force away from the lens, and it protects the internal component to retain zero from sharp recoil impulses and rough handling on shotguns, rifles and handguns.


  • Magnification: 1X
  • Eye Relief: Unlimited
  • Reticle Type: 3.25 MOA Red Dot (Multiple Options)
  • Turret : 1 MOA / Click
  • Length: 1.8 inches
  • Weight: 1.2 oz

Compare Deals:


Trijicon ACOG 3.5X - Best Fixed Power Optic

SCAR 17 with ACOG 3.5X best scar acog

Why Use Trijicon ACOG 3.5X - The 3.5X ACOG is built just like any other ACOG scopes used in real world combat. It looks, feels and performs great on the SCAR rifle, and the prism glass design works very well for shooters with astigmatism.

Related Content: ACOG 3.5X vs 4X

Shock-Resistant Internals - Holds zero from 22LR to .50BMG and everything in between. SCAR recoil force will NOT break the scope.

Built like a tank - Fully forged 7075 T6 aluminum housing protects internal components to survive rough handling, physical abuse, sharp recoil and retain zero.

Precise Aiming Reticle - Chevron tip reticle helps range known size target distance and provides a clean and precise aiming point. 

Aftermarket Mounts - Use any aftermarket SCAR rated ACOG scope mount from Geissele Precision, or LaRue to ensure zero without any optic movement.


  • Magnification: 3.5X
  • Objective Lens: 35mm
  • Eye Relief: 2.39"
  • Reticle Type: TA11 BDC
  • Turret : 0.33 MOA / Click
  • Length: 8 inches
  • Weight: 14 oz
  • Compare Deals:


    Vortex Razor HD 1-10X - Best Do-It-All Optic


    Why Get A LPVO ? LPVO can pretty much do everything that a red dot and a magnified optic can in one package. The RAZOR HD Gen 3 1-10X is mainly hitting targets up to 600 yards and also have the capability to go 1X without adding a secondary sighting system.

    Now 10X Magnification - Bridged the gap between a mid-range LPVO with a long range precision scope without compromising size, clarity or field of view.

    Fast 1X Target Acquisition - 3 inward arrows quickly draws the eye to the illuminated reticle center for CQB actions. 

    CQB to Long Range - Transition fast between 1-10X for anyone shooting close and long-range targets.

    Better Target ID - See clearly down range and aim with more precision at 10X than with a 1X red dot.

    Range Target Fast - Quickly estimate the target distance as well as holdover and windage corrections simply by superimpose the hashmarked ranging subtension lines on the target.

    Lifetime Warranty - You break it, Vortex will replace it at no cost with a lifetime, unconditional warranty. Even if it is not a original purchase.


    • Magnification: 1-10X
    • Objective Lens: 24mm
    • Focal Plane: First Focal
    • Tube Size: 34mm
    • Reticle Type: EBR 9
    • Turret : 0.25 / click
    • Length: 10.1 inches
    • Weight: 21.5 oz

    NightForce ATACR 4-16X50 FFP - Best For Long Range

    Nightforce optics on fn scar 20s long range
    Image Referenced Larry Vicker

    Why People Buy NightForce - The NightForce ATACR series scopes are top of line products generally marketed for military applications. If you need your 17" or a 20" SCAR rifle to hit beyond 600 - 800 yards. This is the best to get and the best to start learning to shoot long range with.

    Mil-Spec Grade - 7075 T6 hard anodized scope body protects all scope internals from recoil and shock to maintain zero.

    Instant Return To Zero -  No more counting or getting lost in the turret in the dark when dialing back to zero. Once the ZeroStop position is set, just dial until it comes to a stop without even looking at it.

    True Reticle At Any Magnification - Whether 4X or 16X, the reticle subtension stays true for all magnification for accurate target ranging and hold.

    Crystal Clear Glass - Aim and track your shot clearly through the lens for long range applications with an unclutter reticle center.

    Capped Turret - The windage adjustment is capped to prevent accidental adjustments in the field.


    • Magnification: 4-16X
    • Objective Lens: 50mm
    • Focal Plane: First Focal
    • Tube Size: 34mm
    • Reticle Type: EBR 9
    • Turret : 0.25 MOA or 0.1 Mil / click
    • Length: 13.1 inches
    • Weight: 33.3 oz

    Compare Deals:


    Leupold Mark 6 3-18X44 - Best For NV & Thermal

    scar 20s with leupold mark 6
    Image Referenced IRAQVETERAN8888

    Why Buy This One ? - The MARK 6 3-18X is a more compact version of the Mark 5HD with just the right amount of magnification ideal for accurate drop-dead accurate shooting just like the NightForce ATACR above. It fits great on the SCAR 17 for range shoot and night vision setup. 

    Night Vision & Thermal - Add any night vision or thermal adapter right in front the the compact scope for hunting and night shoots

    DMR Optimized - Lightweight scope for SCAR 17 configured as Designated Marksmanship Rifle for shooting up to 1000 yards.

    See In Low Light - Xtended Twilight Lens System gives shooter more of light transmission to still able to aim with the reticle during low light condition.

    Wide Turret Travel - 34mm tube gives the shooter more click adjustment for hitting targets up to 1000 yards without the need of raised MOA mount


    • Magnification: 3-18X
    • Objective Lens: 44mm
    • Focal Plane: First Focal
    • Tube Size: 34mm
    • Reticle Type: Mil Dot
    • Turret : 0.25 MOA or 0.1 Mil / click
    • Length: 11.9 inches
    • Weight: 23.6 oz

    Also Check Out: Best Riflescopes for 308

    Best Optic Mounts For SCAR

    best scar rated optics mounts

    The SCAR rifle in the 308 platforms have soft perceived recoil but the gun's forward recoil impulse when its heavy bolt slams forward after a shot has been fired still poses the possibility for scope damage.

    The best mounts that can handle all that recoil and protect your expensive optic are:

    • Leupold MARK 6 & NightForce ATACR- Sphur Precision Mount, Geissele Super Precision SOPMOD certified mounts [Rated For SCAR], Badger Ordnance 34mm scope rings. CHECK OUT: BEST 34MM SCOPE RINGS

    • Trijicon ACOG - Geissele Precision ACOG Mount with Keeper Nut [Built with 7075 T6 Aluminum provides 2800 lbs of clamping force + 4 recoil lugs for max rigidity & zero repeatability]

    Additional Resources

    If you didn't find what you were looking for, please check out these scope guides below:

    Best Long Range Scopes For 6.5 Creedmoor

    Best Long Range Scopes For 1000 Yard