Complete Builder Set


Handguard Length
For California residents. We use the Battle Arms conversion to lock the magazine and the Kingpin to minimally separate (action disassembly) the upper and lower receivers.

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Complete Builder Set

Some of our best technology lies in our receivers and handguards. This kit includes those components: lower receiver, upper receiver, and handguard. Combine these with your favorite barrel and you have one of the sleekest, smoothest shooting, and most reliable AR-15’s on the market.

Lower Receiver

Mil-Spec dimensions, but so much more. Made from Aerospace Grade Aluminum, our lower receiver gives style points while aiding in faster magazine changes. But perhaps the biggest magic is in the Linear Compression Pad slot (pads included). The Linear Compression Pad provides a constant 6 pounds of pressure onto the front of the upper receiver, providing a tight, rattle-free fit to just about any upper you put on it. This method is superior to rear tension screws often found in the high-end receivers. Rear tension can cause premature wear on your extension tube while exacerbating carrier tilt.

Upper Receiver

The upper receiver is machined from Aerospace Grade Aluminum with enhanced walls for greater rigidity and structural integrity – all while keeping a low profile. It features two anti-rotation holes that align precisely with our handguard. During install, insert the two alignment pins, align the handguard, and tighten. What you’re left with is a monolithic-like style and design with an extremely robust upper/handguard combination.


Our handguard brings the full package together with its monolithic-like style when paired with our upper. Like to accessorize? Our handguard gives you seven sides of M-LOK compatible mounting slots with a full-length Picatinny top rail. Even if you don’t fill this space with lights and lasers, the hand deburring process it goes through ensures a smooth finish throughout. And for style-conscious people, our barrel nut is hidden to provide an even cleaner look.

Hardware includes: ambi bolt release, ambi mag release, billet bolt catch, pivot pin, rear takedown pin