BLEM Bushmaster® A4 Modified Complete Upper Receiver

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SKU: 99-F1006483
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MAY HAVE SMALL COSMETIC BLEMISHES. This product has been used as a demo or display model, which may have minor cosmetic flaws. We want to assure our customers that despite these minor imperfections, the functionality and performance of the item remain uncompromised. By purchasing this product, you'll enjoy the same high-quality experience as our brand-new products, but at a significantly reduced price.

Why we made BLEM Bushmaster® A4 Modified Complete Upper Receiver


Bushmasters® A4 Modified Complete Upper Receiver is the perfect addition to your build list. Made with high-quality materials and expert craftsmanship, this upper receiver is the perfect choice for any gun enthusiast. Cut for proper extraction of the 450 Bushmaster and 350 Legend Rounds.

Crafted from 7075 forged aluminum and finished in black Type III Hard Coat Anodizing, this A4 flat top upper receiver is durable and lightweight. Plus, with its M4 feed ramps, you can expect reliable feeding and smooth operation. It comes with the forward assist assembly and ejection port door installed, allowing for quick and easy installation on your build.

But that's not all - our A4 Complete Upper Receiver makes a great option for replacing well-used and worn-out legacy Bushmaster® upper receivers.

Proudly made in the U.S.A., you can trust in the quality and craftsmanship of our A4 Complete Upper Receiver. Whether you're a seasoned gun enthusiast or a beginner looking to start a build, this upper receiver is the perfect choice. Don't settle for anything less than the best - try our A4 Complete Upper Receiver.

Important Information

Firearms Shipments:
In accordance with federal regulations, firearms may only be shipped to a licensed dealer. To avoid any delays in delivery, kindly ensure that you provide the FFL Dealer's information in the Shipping Directions when placing your order. If you do not provide the information with your order, we will reach out and request you provide us with your dealer's information to obtain a copy of their FFL. Once we receive the FFL, we will begin processing your order, and the lead time will start from that point. Please feel free to reach out to us at FFL@bushmaster.com if you have any queries or concerns regarding this proces.

Lower Receivers Shipments:
Lower receivers are also considered firearms under federal regulations and require an FFL (Federal Firearms License) prior to shipment. Therefore, it is important to ensure that your FFL dealer sends us a copy of their license, along with your name and order number via email. We appreciate your attention to this matter as it helps us ensure a smooth and timely delivery of your order. If you have any questions or concerns about this process, please do not hesitate to contact us at FFL@bushmaster.com

Magazines Shipments:
The magazine capacity of the firearm will depend on the jurisdictional restrictions of your state of residence. We want to ensure you receive a product that complies with your state's regulations.

Shipping to Alaska or Hawaii:
If you're shipping to Alaska or Hawaii, please be aware that there may be additional shipping charges. If applicable, we will contact you at the time of shipment to discuss additional costs. As always, your satisfaction is our top priority.

Important Information:
Warning: This product can expose you to chemicals, including lead, known to the State of California to cause cancer, birth defects, or other reproductive harm. For more information, go to - https://www.P65Warnings.ca.gov