Humboldt Receiver Set

Due to high demand, please allow up to 3 weeks for order fulfillment.
Shipment to an FFL dealer is required. Please disclose which FFL will be receiving this item in the boxes below or in the "Order Instructions" during checkout.                                                                                                                                                       After you have placed your order, contact your chosen FFL dealer and have them email a copy of their license to and reference your name and Order ID number.                                                                                                                                                                                                It is the purchaser's responsibility to contact their chosen FFL dealer and ensure the above mentioned email is sent and arrange the reception of the product. Failure to do so will delay your order processing and shipping.
(1 review)
9.00 (in)
9.00 (in)
6.00 (in)
Current Stock:
Passion, Precision, Performance! Designed for a flawless fit, and machined out of solid 7075 T6 billet aluminum, this expertly crafted upper and lower receiver set form the base of your AR build. Designed with an oversized trigger guard and ultra-flared magwell for optimum use. Mil-spec in order to fit other parts of your choice, this is a set you don't want to pass up.
Always made in the U.S.A.
Weight: 1.0 lbs
Lifetime Manufacturing Warranty


  • 5
    Quality Craftsmanship

    Posted by Castle Arms on Jun 1st 2021

    This receiver set is made with attention to detail and quality craftsmanship. It's light, durable, and has great lines which make the design aesthetically pleasing! Great Job!