Outfitters Score™
Excellent
Knights Armament scores as a top-tier build with premium pricing and most components included.
Our proprietary rating combines brand tier, price percentile within the caliber, feature completeness, barrel versatility, retailer availability, caliber practicality, and use-case fit.
Description
KNIGHT'S ARMAMENT SR-15 KS-4 5.56 NATO SEMI-AUTO RIFLE The KS-4 features a 16" cold hammer forged barrel. A 15" URX6 handguard fully protects the barrel and gas system, with ample mounting space for large night-vision devices in conjunction with high magnification primary optics, while leaving sufficient room for a suppressor. SPECS Barrel: 16", cold hammer forged, 1:7" twist, chrome lined Cartridge: 5.56 NATO Weight: 6.55 lbs. Length: 32.5" - 35.7" Mfg: Knights Armament
Features
M Lok|Cold Hammer Forged
Full Specifications
Overview
| Brand | Knights Armament |
| Model | 121442 |
| SKU | 430115842 |
| Rifle Type | semi auto |
| Platform | AR15 |
| Caliber | 5.56 NATO |
| Chamber | 5.56 NATO |
| UPC | 819064019244 |
Barrel
| Barrel Length | 16" |
| Barrel Finish | chrome-lined |
| Twist Rate | 1:7 |
Receiver
| Receiver Type | forged |
| Forward Assist | No |
| Dust Cover | No |
Handguard
| Handguard Type | m-lok |
| Handguard Length | 6" |
| Free Float | No |
Muzzle
| Suppressor Ready | Yes |
Sights & Optics
| Optic Ready | Yes |
Dimensions & Weight
| Weight | 6.5 lbs |
| Magazine Capacity | 30 rounds |
Finish
| Finish | black |
Compliance
| CA Compliant | No |
| Classification | Rifle |
| NFA Item | No |
What's Included (Complete Rifle)
This is a complete, ready-to-shoot firearm.
Upper Receiver
Lower Receiver
forged
Barrel
16"
Bolt Carrier Group
Handguard
m-lok, 6"
Stock
Grip
Trigger
Muzzle Device
Charging Handle
Gas Block
Gas Tube
Buffer Tube
Backup Iron Sights
Optic
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Manufacturer · Tier 1
See everything Knights Armament Company→
Build Guide
See our Suppressor-Ready Build→
State Check
This rifle has NFA or magazine considerations →
Home of the SR-15 and SR-25 platforms. One of the original AR innovators, with deep military roots and a premium price tag to match.
View brand profile →Sr-15 Ks-4 5.56 Nato Semi-Auto Rifle - Sr-15 Ks-4 5.56 Nato 16" Bbl (1)30rd Mag M-Lok Black
121442
Across 1 retailer
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