Limited Time Products

Limited Time Products – Exclusive AR15 Kits, Uppers & Parts

Don’t miss your chance to grab limited time AR15 products from AR15-Overstock.com — featuring top-performing micro AR pistol uppers, 5 inch ARP kits, and more. These exclusive builds and components are designed for shooters who want performance, precision, and unbeatable value.

From rifle kits and micro pistol kits to AR uppers and seasonal products, every item is built to last and priced to move fast. Whether you’re upgrading your setup or starting a new build, our limited time AR products deliver quality craftsmanship and head-turning designs you won’t find anywhere else.

Act fast — these kits and uppers are available only while supplies last.
Shop Micro AR Pistol Uppers, 5 Inch ARP Kits, and more limited-time builds today

  • 5 Slot M-Lock Rail Section, firearm accessory rail with five slots for attaching optics and accessories.

    5 slot m-lock rail Section/ 905-092

    The 5 Slot M-LOK Rail Section is built for shooters who demand strength, reliability, and versatility. Designed from durable aluminum with a hard-anodized finish, this rail section allows you to quickly and securely attach a variety of accessories...

    Was: $16.99
    On Sale $3.99
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  • AR15 Pistol Upper Assembly, 4-inch 9mm with American flag design, black finish, and tactical rail.

    AR15 Pistol Upper Assembly / 4" 9mm / American Flag / 160-499

    This AR-15 upper receiver assembly comes ready to attach to any Mil-Spec lower receiver. It is built around a 4-inch, 4150 chrome moly barrel with a durable black nitride finish for enhanced corrosion resistance and longevity. The upper receiver features...

    Was: $359.00
    On Sale $219.00
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  • Echo Micro Dot Sight, compact black gaming or firearm sight with adjustable settings and reflective lens

    Echo Micro Dot Sight/ 230-009

    The XTS-EDS Echo Micro Dot Sight is built for reliable performance in demanding conditions. Featuring a rugged construction, adjustable red dot brightness settings, and precise windage and elevation controls, this compact optic delivers fast target...

    Was: $199.99
    On Sale $188.99
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  • AR-10 Bolt Carrier Group - .308 / 130-020, black metal firearm component for rifle assembly.

    AR-10 Bolt Carrier Group - .308 / 130-020

    There is nothing more crucial to the performance of your AR-10 than the bolt carrier group. Made to MIL-SPEC and finished with superior quality nitride finish that protects against corrosion and heat, our BCG wont t let you down. In order to ensure...

    Was: $239.90
    On Sale $219.00
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  • AR15 Rail – 15 " / M-LOK Handguard / Competition Top / 120-050

    5 Pack AR15 Rail – 15 " / M-LOK Handguard / Competition Top / 120-050

    These AR15 handguards are built to provide rugged, reliable performance. Designed with the advanced shooter in mind, these AR handguards are both sleek and ergonomic in the hand and that translates into faster on-target performance and ease of use. These...

    Was: $149.00
    On Sale $50.00
  • AR-15 Barrel – 7 " / 9mm / 1:10 TWIST / 110-900

    5 pack AR-15 Barrel – 7 " / 9mm / 1:10 TWIST / 110-900

    The AR-15 Barrel – 7" / 9mm / 1:10 Twist is crafted from 4150 Chrome Moly Steel, heat-treated for durability, and stress-relieved for strength. With a nitride finish for corrosion resistance, it features a 9mm chamber and a 1:10 twist rate,...

    Was: $399.00
    On Sale $200.00
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  • AR15 Barrel – 7 " / 7.62×39 / 1:10 TWIST / 110-525

    5 Pack AR15 Barrel – 7 " / 7.62×39 / 1:10 TWIST / 110-525

    The barrel is one of the few components that directly affect the accuracy and weight of your build. Designed for corrosion resistance, this barrel will not let you down. This barrel is machined from 4150 Chrome Moly Steel, heat treated to RC 28-32...

    Was: $399.00
    On Sale $200.00
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  • CPF Pistol Kit, 5-inch 5.56 NATO rifle kit with anodized blue parts and detailed components for customization and assembly.

    CPF Pistol Kit / 5" 5.56 Nato / 1:5 / 205-819 Anodized Blue

    THIS 5 INCH AR PISTOL KIT IS EVERYTHING YOU NEED TO BUILD A MICRO AR PISTOL EXCEPT A STRIPPED LOWER. The receiver is a flat top M4 Mil-Spec upper receiver are forged CNC Machined from 7075-T6 Aluminum, the hardest and most durable material of any upper...

    $329.00 - $419.00
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  • Polymer Front Flip-Up Sight FDE / 230-005, tan-colored tactical firearm front sight with flip-up mechanism for accurate aiming.

    Polymer Front Flip-Up Sight FDE / 230-005

    The Polymer Front Flip-Up Sight FDE is a lightweight and durable aiming solution designed for reliable performance on any AR platform. Constructed from high-quality polymer, the XTS-FFST front sight delivers strength without adding unnecessary weight to...

    Was: $20.00
    On Sale $16.50
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  • Birchwood Cleaning Kit

    Birchwood Cleaning Kit / 230-312

    The AR-15 & AR-10 Cleaning Kit / 230-312 is a must-have accessory for gun enthusiasts. This comprehensive kit includes all the necessary tools for maintaining your AR-15 and AR-10 rifles. The kit comes with brushes, patches, rods, and oil to ensure...

    Was: $39.00
    On Sale $10.00
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  • 45 Degree Flip-Up Polymer Sight Set / 230-540, black flip-up scopes for firearms with adjustable elevation and quick deployment features.

    45 Degree Flip-Up Polymer Sight Set / 230-540

    The 45 Degree Flip-Up Polymer Sight Set is designed for fast target transitions and dependable backup sighting performance. Mounted at a 45-degree angle, these sights allow shooters to quickly switch from their primary optic to iron sights with a simple...

    Was: $34.99
    On Sale $28.99
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