Knights Armament Sr-15 Iws Lower Receiver Complete
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Knights Armament
Overview
The Knights Armament SR-15 IWS Lower Receiver is a complete assembly designed specifically for the AR-15 platform, crafted from durable 7075-T6 aluminum and finished with a hardcoat anodized treatment for enhanced wear resistance. It features non-ambidextrous controls and is compatible with the 5.56 NATO caliber, making it a reliable choice for standard builds. This lower receiver is commonly found in carbine gas system configurations, providing builders with a solid foundation for their rifles.
Specifications
Available Merchants(3)
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August 2026 on GunPartPicker
Knights Armament Sr-15 Iws Lower Receiver Complete ranked #60 of the 507 lower receivers builders added on GunPartPicker in August 2026. Builders have been adding it to their builds on GunPartPicker since January 2026. All time, it ranks #60 of the 990 lower receivers builders have added. Builds with this lower receiver are mostly chambered in 5.56 NATO (73%, then .223 Wylde 27%), split between carbine-length (50%) and mid-length (50%) gas systems, and nearly all AR-15.
It was out of stock everywhere we track for all of August 2026, and today none of the 3 retailers we track has it in stock right now. Listed prices start at $959.31 at BattleHawk Armory for when it comes back.
Updated · from real builds on GunPartPicker · Prices checked · refreshed daily across 35 retailers
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Frequently Built With
The part most often added in each category by the 80 builds that include this one
Knights Armament AR-15 Upper Receiver CQB Mod 2 11.5" Urx 4 M-LOK
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EOTECH EXPS3-2 HWS and G43 Magnifier
Magpul AFG-2 Angled Fore Grip - Black
Radian Weapons AR-15 Raptor/talon L/s Combo Black Anodized
Build Configuration Breakdown
Aggregated and anonymized data showing how builders use this product
CaliberBased on real build data showing which calibers builders choose alongside this product.
Gas SystemBased on real build data showing which gas system lengths builders use with this product.
Builds Featuring This Part
See all 3 →Builds in the community that include the Knights Armament Sr-15 Iws Lower Receiver Complete
| Build | Parts | Total |
|---|---|---|
 | 7 | $3181.26 |
 | 6 | $2087.49 |
| 7 | $2331.91 |
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