NS Armory FDE SR-15 KS-1 Package

Description

Manufacturer: Knights Armament Company

System Integrator: NS Armory

Part Number: NS121439

Product Description: With inspiration taken from the UK's MOD L403A1, we took factory KS-1's and Cerakoted them FDE and acquired all the correct parts necessary in order to bring you our KS-1 packages. The exact package contents are below.

Note: These packages are not a KAC sku.

Package Contents:

Knight's Armament 13.7" KS-1 Factory SBR
5.56 QDC MCQ-1
MCQ Suppressor Shroud
L403A1 Contract Vortex AMG 1-10
L403A1 Contract Reptilia AUS/ROF
Factory FDE Aimpoint ACRO P-2
Magpul CTR Stock
Magpul MIAD Grip
Magpul Gen M3 Pmag
Magpul Pro MBUIS
Letter of Authenticity

Project Hunter Explained:

In August 2021The UK launched Project Hunter to select a new Alternative Individual Weapon (AIW) to replace the SA80/L85 series of rifles and Colt Canada L119s in service with the Rangers and elements of the Royal Marines Commandos. After two years of competition the UK MoD announced that Knight’s KS-1 has been selected as the L403A1, beating off reported competition from Heckler & Koch, SIG Sauer, Daniel Defense and Glock.

Rifle Requirements:

The AIW system must be optimized to be used with a suppressor fitted as its primary configuration. The AIW system will consist of:

1. A Rifle System (comprising of a Rifle and Signature Reduction System)

2. An Optic System

The AIW system will be a 5.56mm Armalite Rifle (AR) platform, optimized for use with L15A2, a 62gr5.56x45 NATO ball round, equivalent to SS109.

An AR platform is defined as being gas operated with a rotating, locking bolt. The rifle should have a non-reciprocating charging handle. The rifle’s controls are to include: a magazine release, working parts release and a rotating selector lever that incorporates a safe setting. The rifle is to have a standard configuration, not bullpup, with the magwell in-front of the trigger housing. The rifles upper and lower are to be mated using industry standard pivot / takedown pins located at the front and rear of the lower receiver.

Signature Reduction System:

The Signature Reduction System is to be detachable, to enable the operator to configure the Rifle System to meet operational requirements.

Optic System:

The Optic system is to complement the Rifle and should be ballistically matched to the stated ammunition nature and supplied barrel length.

Alternative Individual Weapon System:

As a complete system, the AIW system is expected to perform consistently regardless of its configuration, i.e. with or without a Signature Reduction Device fitted, across all operational scenarios.

The new rifles will supplement the L85A2 and L85A3 which currently equip the majority of the UK armed forces. The rifles will be procured via UK-based company Edgar Brothers and the £90 million ($110 million) contract will see up to 10,000 new rifles delivered over the next decade. An initial £15 million order for 1,620 AIW systems has been placed with the British Army fielding them with the Army Special Operations Brigade, with the brigade expected to receive the first rifles by the end of 2023. The Royal Marines’ ‘strike companies’ and Surveillance and Reconnaissance Squadron will also be among the first to receive the L403A1. The ‘Alternative Individual Weapon’ essentially fulfils the same role every AR-pattern rifle in UK service has since the 1960s.

The UK’s Minister for Defense Procurement, James Cartlidge said:

“This is another example of how we are committed to investing in the most advanced battlefield equipment to back our troops on the battlefield. This advanced rifle’s ability to help soldiers maintain the stealth edge not only protects them but delivers war-fighting advantage over our adversaries.”

Interestingly, the UK Ministry of Defense's press release emphasizes that as an AR-pattern rifle the L403A1 “shares much in common with the rifle systems used by many of the UK’s allies. Given their specialist role, and the critical task of working with and alongside many of the UK’s allies, the platform will enable ASOB to share skills and drills in an efficient manner.”

Source: Armourers Bench

KS-1 Description:

The KS-1 model boasts a precision-crafted 13.7” (349mm) heavy-profile barrel, meticulously cold hammer forged with ball mill dimples. This design innovation enables the attachment of a compact, high-efficiency suppressor while maintaining an overall length akin to a 10.3” carbine with a standard suppressor, yet with a marked improvement in muzzle velocity. Renowned for its heat-resistant properties, the heavy-profile barrel ensures consistent point of impact over extended periods of use. The strategic ball mill dimpling not only aids in weight reduction but also effectively mitigates heat-induced shifts commonly associated with traditional fluting patterns.

Specifications:

Barrel:

- 13.7” (34.8 cm) 1 in 7” (2.54 cm) Twist

- Cold Hammer Forged

- 32CrMoV12-10 Dimpled Heavy Profile

- Chrome Lined

Caliber: 5.56mm NATO
Length: 30.3" (77 cm) to 33.5" (85.1 cm)
Weight: 6.88 lbs (3.12 kg)

- URX6 Handguard

The URX 6 is an advanced, self-indexing handguard designed for exceptional shift resistance. It features a full-length 12:00 MIL-STD 1913 interface rail complemented by seven sides of M-LOK negative space mounting slots. This handguard seamlessly slides over the attached barrel nut, with precision alignment facilitated by an anti-rotation index tab and slot mechanism integrated into the top rail of the upper receiver. The anti-rotation and alignment elements are sleek and unobtrusive, eliminating any external snag or catch points. The handguard is secured by a robust retention nut that exerts considerable force at the attachment point, ensuring maximum stability and resistance to impact-induced shift.

- E3.2 Bolt

The E3 bolt, famed for its extraordinary robustness and functionality, leaves little room for enhancement. Its radiused lugs and reduced diameter cam pin hole render it the most durable AR-pattern bolt known to date. The dual-spring extractor, featuring improved leverage, adeptly resolves extractor durability and operational issues commonly encountered with short-barreled carbines. The E3.2 bolt directly addresses the nuances of ejection performance, particularly when employing a suppressor on a short-barreled carbine. Dual ejectors considerably mitigate wear and prolong lifespan compared to the legacy single ejector, delivering sustained ejection force to the case head due to strategic ejector placement. A vibration-dampening o-ring works synergistically with the extractor, ensuring a constant and positive force of the extractor claw against the case rim throughout the extraction and ejection processes. Furthermore, stress relief features incorporated into the lugs significantly extend the service life, while a hard chrome coating resists fouling accumulation, thereby simplifying the cleaning process.

- Integrated Trigger Guard

The integration of the trigger guard into the lower receiver eradicates inherent weak points vulnerable to damage during installation and removal. This reinforcement fortifies the lower receiver itself, enabling the inclusion of supplementary features without jeopardizing structural integrity over prolonged use or impacts from significant heights. The integrated trigger guard preserves the tactile feel and visual appeal of the removable combat trigger guard, ensuring versatile hand placement and seamless compatibility with standard grips.

Reduced Profile Charging Handle Latches

The included ambidextrous charging handle has undergone a refinement with reduced lever lengths by .016” (4mm) to mitigate the risk of inadvertent snagging or activation. Despite their abbreviated design, the medium-length latches retain ease of accessibility, ensuring seamless operation even when wearing gloves.

- Modular Selector

The versatile selector levers on both sides of the firearm can be effortlessly replaced using a simple torx driver. The array of lever options includes a full-length lever, a specialized "hybrid" lever designed with a scallop to prevent interference with the firing finger, a compact short lever, and a dedicated indicator lever. This wide selection of levers allows for seamless customization and can be swiftly installed or swapped on either side of the rifle.

- Ambidextrous Bolt Catch and Release

The symmetrical integration of the bolt catch/release mechanism on both sides of the lower receiver exemplifies a strategic design enhancement. By replicating the precise location, shape, and protective fencing on the right side, potential hazards such as snagging and inadvertent manipulation are effectively mitigated. Moreover, the meticulous reshaping of the left side paddle introduces heightened texture and surface area, culminating in an optimized profile for the bolt release section.

- 3-Position QD End Plate

The enhanced end plate design now boasts three dedicated locations for securing QD sling swivels. In a strategic refinement, apart from the conventional left and right-side attachment points, a novel rear position has been introduced. This rear placement ensures optimal positioning of the QD sling connection, minimizing potential side snags and maintaining a clear path from the firing hand.

5.56 QDC MCQ-1 Description:

Product Description: With an additional length of only 2.3" (5.92 cm) how did weight of 13.9 oz (395 g) and low back pressure of the Pressure Reduction Technology (PRT) design, adding the Mini Close Quarters (MCQ) signature reduction device to a system will have negligible impact to function and handling. With a noise reduction rating of 12 dB, common single-layer, hearing protection is all that is needed for comfortable and safe use. PRT ensures that bolt carrier, velocity and cyclic rate of fire are nearly identical to unsuppressed use, with significantly reduced noxious gas exposure. The Quick Detach Coupling (QDC) ensures, minimal and consistent point of impact (POI) shift and is compatible with all KAC QDC Muzzle devices. A removable protective shroud that integrates with the suppressor locking color is available. The 5.56QDC/MCQ–PRT is recommended for those that prioritize overall system, weight, and length over sound level.

Specifications:

Addition to bare muzzle: 3.85" (9.78 cm)
Addition to QDC 3-prong FH: 2.33" (5.92 cm)
Over all length: 4.43" (11.25 cm)
Weight: 13.9 oz (395 g)
Sound reduction: 12 db

Pressure Management: To reduce the negative effects of suppressor, use, pressure, reduction, technology (PRT) suppressors, release contained system, pressure forward and away from the user and operating parts early in the unlocking an extraction phase of the cycle of operation. This venting process drastically reduce his user exposure to harmful combustion gases, reduces the "blowback" effect of residual, bore pressure and decreases the internal fouling. Compared to a traditional baffle design of similar size.

Signature Reduction: In 2017 KAC began a study to determine and address the cause of first-round flash with suppressor use. While purging the suppressor with an inner gas was successful in reducing the first round flash, it would be cumbersome for practical use. The solution was found any novel baffle matrix that uses the blast pulse of the contained pressure to mechanically remove the combustible environment from the suppressor. This patent pending design effectively reduces spectrum flash, as well as near, short-wave, and mid-wave IR "Infrared"; and eliminates the need for flash suppressant in propellants. KAC's "purge" technology does not impact system pressure or sound pressure levels, but does illuminate first round flash, as well as the audible "first round pop" found with traditional suppressors.

Durability: Advancement in simulation, analysis and manufacturing processes have also contributed to increased service life of KAC’s suppressors. Thermal energy is spread through the monolithic structure on internal paths, eliminating “hot spots” that can fail during extreme use. When tested under continuous-fire protocols, the suppressors indoor 1. 5–2 times the number of rounds fired before failure; and one failure occurs, the structural design ensures that all energy is projected down range with no lateral escape of fragments or debris.

Transfer Requirements:

In an effort to make the transfer process to your local FFL as smooth as possible, please send an email to support@nsarmory.us with the following information described below.
In the email description please include the name you used to complete your order, as well as your invoice number
Finally please include in the email a copy of the FFL “Note if you are purchasing an NFA item please also include a copy of the SOT”

*NFA Item Must Ship to FFL*

For more information please visit www.knightarmco.com

To view more of the Knight’s Armament Company products N.S. Armory offers please visit our Knight’s Armament Company Section!