Setuping the Most Compact AR Bullpup with BRN 180 (VIDEO)

Last updated on February 22nd, 2026 at 08:30 pm

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Let’s Setup The Most Compact AR Bullpup with BRN 180

Have you ever wondered if you could transform your standard AR 15 into a compact AR Bullpup with the Brownell’s BRN 180? In this video, we take a deep dive into the A3 Tactical Triad AR 15 Bullpup Conversion Kit, testing it with the popular BRN 180 upper. Could this be the best ar15 bullpup kit of the year?

The reason this bullpup ar15 works is we’re using a Bufferless AR15 upper. Otherwise an AR 15 bullpup wouldn’t be possible.

(Full Setup & Parts List Below)

A3 TACTICAL TRIAD AR BULLPUP CHASSIS

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BRN 180 Chassis

Rifle

Pistol

Foxtrot Mike AR Bullpup Chassis

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Rifle

Pistol

Affordable Stripped Lower Reveiver

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PSA Jakl Bolt Release

This fits the A3 Tactical Triad

This is the Trigger I used for the AR15 Bullpup

$24.00 OFF After Code TTB10

MUST HAVE Best AR 15 Upgrades Under $100 (VIDEO)

DIE FREE CO – TIGER CLAW M-LOK VERTICAL FORWARD GRIP

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Optic Used In Video

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NEW Brownell’s BRN-180 Gen 3 Uppers Are FINALLY HERE!!!

Blackout Defense Hybrid Keymo Muzzle Device

JMAC Custom Blast Diversion Shield 37 for Keymo

Must be used with the Keymo Hub Adapter Here

BRN 180 Upper (Gen 2)

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Foxtrot Mike FM15 Uppers

Matador Arms MAT-9 Uppers

CMMG Dissent Uppers

Complete Uppers

Complete Guns

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PSA JAKL Uppers and Complete

Complete Uppers

Complete Guns

My Favorite Rifle Slings

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My Favorite Sling Retention Strap

ProTac Rail Mount HL-X Pro Long Gun Light Kit

My Current Favorite AR-15 Magazines

My Go-To Water Bottle for the Range

My Favorite ARMORER’S KIT for AR-15’s

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Real Avid Master Gun Vise

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My Favorite AR 15 Cleaning Kit

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My Favorite AR-15 Cleaning Tool for BCG

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Best Lube I’ve Tested

Badlands 5.56 Reman Range 500 Rounds

This is the only remanufactured 5.56/.223 that I trust…They have 100% QC

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“BOOTY BAGS”

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My Favorite Place to Get Cheap

Codes

Brownell’s Here

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Tier 1 Concealed MSP Holster

It fits any gun that has a SureFire X300, Streamlight TLR-1, Modlight PL350 and PL350C

Flexible and Moves with your Body

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NEW Surefire X300 TURBO – 66,000 candela

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My All Time Favorite Concealed Carry Holster

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Add a Holster Wedge to Any Kydex Holster

Pushes Grip further into your Body
Adds a Cushion above Pubic Bone

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Watch my Review Here!

My Favorite EDC Gun Belt – Designed for Appendix Carry

Watch My Review Here

My Favorite Wireless Electronic Hearing Protection

Pricey, But Worth It

This is how I save about $0.25 cents per gallon on gas

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My Favorite Mag Extensions for Glock, CZ, Sig P320

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My Favorite AR 15 Magazines for Practice & Range Use

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