Build Your Own AR-15 Pistol

Build Your Pistol on Our Virtual Workbench.

Pieces of a Fully Customized AR Pistol
Pistol Brace Kit Upper Parts Kit Lower Parts Kit Upper Receiver Bolt Carrier Group (BCG) Pistol Gas Tube with Roll Pin Pistol Barrel Gas Block Handguard Muzzle Device

Pistol Brace Kit

ARchitect Complete Pistol Brace Kit & Buffer Tube Assembly

Polymer-Bladed Style Clamp-On Brace

Pistol Buffer Tube Assembly

Adjustable Clamp-On Style Blade

“Fully Adjustable for Even Small-Frame Shooters & Youth, Cutout for Sling Installation”

Upper Parts Kit

ARchitect Complete Upper Parts Kit with Charging Handle

Made in the USA

Dust Cover Assembly, Forward Assist Assembly & Charging Handle

Steel Components – Phosphated, Charging Handle – Hardcoat Black Anodized

“Mil Spec, Industry Standard Components.  Will Provide Years of Normal Use.”

Lower Parts Kit

Lower Parts Kit:  ARchitect “ELG” Complete Lower Parts Kit with Fire Control Group

Includes All Necessary Components to Install Lower Receiver

All Components Black Phosphate Coated

“Enhanced Longitudinal Grinding on Hammer & Trigger For Crisp, Non-Gritty Trigger Pull.”

Made in the USA

Upper Receiver

Upper Receiver:  ARchitect Mil Spec Stripped Upper Receiver

Forged 7075-T6 Aluminum

M4 Feed Ramps

Hardcoat Black Anodized

“Perfect Entry-Level, Low Cost Option, Rugged, Durable & Functional.”

Made in the USA

Bolt Carrier Group (BCG)

Bolt Carrier Group (BCG):  ARchitect AR15 Black Nitride Bolt Carrier Group

M16 Profile 5.56/.223/.300/.350 Legend

Black Nitride Coated (Including Gas Key)

“Clean Crisp Look, Easy to Clean & Maintain.”

Made in the USA

Pistol Gas Tube with Roll Pin

Pistol Gas Tube with Roll Pin:  ARchitect Pistol-Length Stainless Steel Gas Tube with Roll Pin

Mil Spec

304 Stainless Steel

Roll Pin Included

“Will Last for Years Under Normal Shooting Conditions”

Made in the USA

Pistol Barrel

Pistol Barrel:  ARchitect .5.56 x 45 Pistol-Length (7.5”) 1/7” Twist Barrel

5” Length, Black Nitride Coated 4140 Steel

750” Gas Block Seat

½” x 28 Threaded for Muzzle Device

Pistol-Length Gas System

“Can Shoot Either Platform Ammo (.223 or 5.56), Good For Heavier Bullets from 60 to 77 Grain.”

Made in the USA

Gas Block

Gas Block:  Super Low Profile ARchitect 0.750” Diameter, Non-Adjustable Gas Block

Set Screw Style

Black Nitride Coated 4140 Steel

“Set Screw Style for Easy Installation & Alignment on our Pre-Dimpled Barrels, Black Nitride Coated for a Consistent Look with the Barrel”

Made in the USA


ARchitect Black Hardcoat Anodized, Slim Profile, MLok Handguard, 7” Length handguard

“The Easiest to Install System on the Market, No Timing & No Shims, Super Sturdy, Long 2” Barrel Nut for Rigidity, Lightweight, Machined To Magpul MLok Standards, Deep Satin Finish Black Anodize that Should be the Industry Standard.”

Made in the USA

Muzzle Device

Three muzzle device options to choose from for your custom AR build. Choose between a Muzzle Brake, Flash Can, or a Flash Hider. Muzzle Brakes reduce recoil and muzzle rise but can be loud, Flash Cans direct blast and sound down-range, and Flash Hiders disperse any fireball and reduce muzzle side and are Industry Standard for most entry-level ARs.

Made in the USA

How to Build Your AR-15 Pistol

Want your pistol to look like the the example above? Simply pick your handguard and muzzle device and select your optional add-ons. Items are automatically added to your cart and every build purchase comes with the BYOAR Standard Build Kit, including: Upper Receiver, Upper Parts Kit, Barrel, Bolt Carrier Group (BCG), Gas Tube with Roll Pin, Gas Block, Butt Stock Kit, and Lower Parts Kit.

Our build kits do not include a lower receiver. You must purchase a lower from a licensed FFL dealer and submit to the proper background checks to receive said lower receiver. Please be aware of all state and local laws as it pertains to building and owning an AR-15 rifle.

BYOAR makes no guarantees or assumptions about your ability to purchase or own an AR-15 lower.

AR Pistol Build

Build your AR Pistol and customize AR by choosing your handguard and muzzle device.

BYOAR Standard Kit Includes: Upper Receiver, Upper Parts Kit, Barrel, Bolt Carrier Group (BCG), Gas Tube with Roll Pin, Gas Block, Pistol Brace Kit, and Lower Parts Kit

Customize: Choose your handguard and Choose your muzzle device