Browse gun parts designed for maintenance, replacement, upgrades, repairs, and custom firearm builds across a wide range of compatible platforms. Whether you need barrels, triggers, springs, pins, controls, or other essential components, this category includes options built for proper fit, reliable function, and dependable performance.
Products List
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BATTLEARMS WORKHORSE AR15/M4 10.5" .223 Wylde Complete Upper Receiver – NO BCG or Charging Handle
Battle Arms DevelopmentWH-UR-10.5-223$529.99The WORKHORSE AR15/M4 10.5" Complete Upper Receiver delivers unmatched reliability and precision performance in a compact configuration. Featuring a 10.5-inch .223 Wylde barrel, M-LOK® free-float handguard, and forged 7075-T6 aluminum receiver,... -
BATTLEARMS AUTHORITY ELITE AR15/M4 7.5" 300BLK Complete Billet Upper Receiver
Battle Arms DevelopmentAUTH-CUR-7.5-300BLK$1,099.99Turn your build into a high-performance short-barrel 300 AAC Blackout (300BLK) rifle with this complete billet upper receiver assembly — including a precision 7.5" barrel, full-auto rated BCG, and the RACK-15 ambidextrous charging handle. Built... -
BATTLEARMS WORKHORSE BLEMISH — Forged Lower Receiver
Battle Arms DevelopmentBLEM-WH556LR$125.00The WORKHORSE Forged Lower Receiver — BLEMISH edition — delivers the strength and reliability of a forged lower at a discounted price due to minor cosmetic imperfections. Forged from high-strength aluminum and finished for durability, this... -
BATTLEARMS Xiphos Billet Dedicated 9mm AR Lower Receiver — Glock Magazine Compatible
Battle Arms DevelopmentXIPHOS-LR$289.00The Xiphos Billet Dedicated 9mm AR Lower Receiver is a purpose-built, Glock-magazine compatible lower engineered for reliable, repeatable 9mm builds. CNC machined from aircraft-grade billet aluminum and finished for durability, this lower accepts... -
BATTLEARMS WORKHORSE AR15/M4 Forged Upper Receiver — OD Green Anodize
Battle Arms DevelopmentWH556-URS-ODG$120.00Forged 7075-T6 upper receiver with MIL-A-8625F Type III OD Green hard anodize — service-grade strength, optics-ready, and built for repeatable alignment with Mil-Spec components. Key Features Forged from 7075-T6 aircraft-grade aluminum for proven... -
BATTLEARMS WORKHORSE Heavy-duty AR15/M4 Forged Upper Receiver
Battle Arms DevelopmentWH556-UR$120.00Heavy-duty forged AR15/M4 upper receiver — precision machined for reliable alignment, rugged service use, and full Mil-Spec compatibility. Key Features Forged from 7075-T6 aircraft-grade aluminum for proven strength and durability Precision... -
BATTLEARMS WORKHORSE FORGED LOWER RECEIVER ANODIZED OD GREEN — AR15 / M16 / M4
Battle Arms DevelopmentWH556-LR-ODG$125.00Durable forged 7075-T6 lower receiver with MIL-A-8625F Type III OD Green anodize — built for heavy use, precise fit, and Mil-Spec compatibility. Key Features Forged from 7075-T6 aircraft-grade aluminum for proven strength and... -
BATTLEARMS WORKHORSE Forged Mil-Spec AR Lower Receiver
Battle Arms DevelopmentWH556-LR$125.00Heavy-duty forged lower receiver — built for longevity, reliability, and Mil-Spec compatibility. Perfect for duty, range, and competition builds. Key Features Forged from 7075-T6 aircraft-grade aluminum for superior strength Mil-Spec...
