The discussion opens with an overview of the FN SCAR family as a widely used special operations platform. The hosts note that SCAR rifles have seen service with various special forces units worldwide, with the SCAR 17 in particular earning a reputation for reliability and accuracy. They explain that around 2004, U.S. Special Operations Command solicited a new weapon system to replace M4 platforms and support multiple calibers, specifically 5.56 and 7.62x51 NATO. FN responded with the SCAR 16, designated SCAR-L for “light,” and a limited number were delivered to the 75th Ranger Regiment between roughly 2007 and 2009. However, the SCAR 16 experienced accuracy issues, parts incompatibility, and problems with planned conversion kits, which led to it being pulled back despite the broader SCAR program continuing.
The conversation shifts to how the SCAR line evolved after the mixed results of the SCAR 16. The SCAR 17 performed well, remaining accurate and reliable, though it developed a reputation for being hard on optics because of the heavy reciprocating mass cycling close to the rail. Despite this, the military continued using the SCAR 17 and adopted conversion kits that allowed SCAR 17 rifles to be configured to SCAR 16 specifications, preserving 5.56 capability. The hosts emphasize that many countries still field SCAR platforms due to their proven performance. As special operations units sought more precision capability, FN introduced additional SCAR variants, including the SCAR 20, a designated marksman and precision rifle with a 20-inch barrel and muzzle brake. The SCAR 20, also known as the MK20 or MARC 20, saw use with Navy SEALs and other special operations elements, though early examples reportedly had an issue where the gun could unintentionally produce a three-round burst, which FN later corrected.
The hosts compare a standard SCAR 20 to their upgraded SCAR 20S build. The original rifle is shown with its factory quad rail, which one host describes as functional but not particularly appealing or modern. In contrast, the upgraded rifle features a Kinetic Development Group (KDG) rail system that changes the overall look and feel of the platform. KDG approached them with parts intended to improve ergonomics and accessory mounting. The upgraded rifle retains the SCAR 20’s core characteristics as a precision-focused, semi-automatic DMR with a 20-inch barrel and brake, but the new rail and accessories are intended to refine handling and usability. The hosts note that they purchased the rifle themselves and then added KDG components and other parts to tailor it for precision shooting and practical use at the range.
Attention turns to the rifle’s stock, optics, and fire controls. The SCAR 20S is equipped with a fully adjustable stock featuring cheek height and buttpad adjustments to support consistent head position during precision shooting. On top, the rifle wears a Leupold Mark 5HD 3.6-18x scope, described as extremely clear and well suited for observing and engaging targets across the rifle’s effective range. Because the optic uses a 35 mm tube, it is mounted in a Warne mount, as fewer companies produce mounts in that diameter. At 100 yards, the hosts report stacking rounds closely, attributing the performance to both the rifle and the glass. The trigger has been upgraded to a Geissele two-stage SCAR trigger, which they consider a significant improvement over the standard SCAR trigger, offering a cleaner break and better control. A Radian safety selector, sold by KDG, provides a 45-degree throw and improved ergonomics compared to the original SCAR selector.
The monolithic upper receiver of the SCAR platform is highlighted as a strength, providing a long, rigid rail that helps maintain zero for optics and accessories. The KDG rail extends and refines this concept by adding M-LOK style attachment points and additional mounting surfaces, including lower rail space that the original configuration lacks. This allows users to mount lights, lasers, clip-on night vision, or other accessories without sacrificing space. The charging handle has been replaced with the KDG “Scarger,” an aluminum charging handle that extends farther out and angles slightly downward. This design reduces the chance of striking knuckles during operation and improves leverage while also cutting some weight compared to the factory part. The hosts contrast it with the original FN charging handle, which they describe as mediocre in ergonomics. Overall, the KDG components are presented as focused upgrades that enhance handling and accessory flexibility on the SCAR 20S.
The rifle’s muzzle is fitted with a SureFire brake that is not the SOCOM-profile version designed for direct suppressor attachment. The hosts discuss FN’s position on suppressor use with SCAR rifles, noting that while the platform features an adjustable gas system with settings for suppressed and unsuppressed operation, FN states that attaching a suppressor is not supported by the company. They treat this as a point of confusion and frustration, briefly joking about the idea of a suppressor being near the rifle. Despite the adjustable piston system, they emphasize that FN officially discourages suppressor use from a factory-support standpoint. Up front, the rifle is supported by a Harris bipod, which provides a stable, adjustable platform for prone or supported shooting. The bipod is used to level and angle the rifle for longer-range engagements, contributing to the smooth shooting experience they describe.
The SCAR 20S in this configuration is chambered in 6.5 Creedmoor. The hosts contrast 6.5 Creedmoor with 7.62x51/.308, acknowledging .308 as a solid NATO cartridge for reaching distance but emphasizing that 6.5 Creedmoor has shown superior accuracy in their testing. They reference previous bolt-gun series videos where 6.5 Creedmoor consistently performed well. On this rifle, the combination of the 6.5 Creedmoor chambering and the muzzle brake results in a very smooth-shooting platform, though with notable muzzle blast. A Magpul vertical or hand stop style foregrip is mounted to aid control when shooting from standing or other unsupported positions, complementing the Harris bipod used for prone work. The hosts describe the overall recoil impulse as manageable and conducive to precise follow-up shots, reinforcing the rifle’s role as a designated marksman or precision semi-automatic system.
In closing, the hosts review remaining controls and configuration details. The rifle uses an ambidextrous magazine release and is shown with a 10-round magazine, though 20-round magazines are also available for the platform. The bolt catch and bolt release are not ambidextrous, but they argue that for a rifle intended for static or semi-static precision roles rather than close-quarters, this is not a major drawback. The safety selector and magazine release being ambidextrous are considered sufficient. They note that the charging handle on this upgraded SCAR 20S is non-reciprocating, which helps protect the shooter’s thumb and improves comfort during firing. Overall, they present the SCAR 20 / MK20 / MARC 20 configuration on display as a well-thought-out precision setup that largely speaks for itself, combining the SCAR platform’s monolithic upper and reliability with carefully chosen aftermarket enhancements.
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