"Comments Section Carbine" 5.56 NATO 12.5" AR Pistol - Audience Dream Build
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This item is regulated, therefore your entire order will be shipped to an FFL dealer of your choosing. After you place your order, we will contact you to finalize these details.
6 Magazines Per Order: Due to extreme volume, we are limiting sales of magazines to 6 per customer order. This applies to individual and bundled magazines. AT3 reserves the right to cancel any order over the 6 magazine limit.
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- Backed by the AT3 Lifetime Warranty! what it covers
Product description
“Comments Section Carbine” 12.5″ 5.56 NATO AR Pistol – October Audience Dream Build
The “Comments Section Carbine” is the AT3 October Dream Build, and our audience built every part of it. Viewers on YouTube and social media chose each component, one comment at a time. The result is a compact 12.5-inch 5.56 NATO AR pistol set up to run suppressed.
Build Overview
A titanium AT3 Slick Side billet upper houses a Ballistic Advantage 12.5-inch Modern Series barrel with a 1:7 twist. A 10-inch BCM MCMR M-LOK handguard covers the carbine-length gas system. The Superlative Arms adjustable gas block lets you tune gas flow for suppressed or unsuppressed shooting.
Inside, a STNGR phosphate M16 bolt carrier group with a C158 bolt runs the action. A Radian Raptor SD ambidextrous charging handle and Strike Industries dust cover complete the upper.
The lower starts with a titanium AT3 AT-15 receiver and a Rise Armament premium lower parts kit. A Rise Rev 535 3.5-pound single-stage trigger delivers a crisp, light break. A Magpul MOE SL grip and SB Tactical SBA5X pistol brace handle the ergonomics. An AT3 carbine buffer, buffer spring, and mil-spec buffer tube complete the recoil system.
A SIG SAUER ROMEO-MSR Gen II red dot and JULIET5 5X magnifier cover close and intermediate distances. An Inforce WML Gen 3 light, Magpul MS1 QDM sling, and STNGR QD M-LOK sling mount add practical support. STNGR Cyclops and Magpul rail covers, a Cole-TAC suppressor cover, and a Magpul PMAG round out the package.
Note: Suppressor not included. Suppressor shown in build photos and video is for demonstration only.
Features
- Audience-built 12.5-inch 5.56 NATO AR pistol configuration
- Ballistic Advantage Modern Series barrel, 1:7 twist, carbine-length gas
- Superlative Arms adjustable gas block for suppressor tuning
- BCM Gunfighter MCMR 10-inch M-LOK handguard
- Titanium AT3 Slick Side billet upper and AT-15 lower
- STNGR chrome-lined M16 bolt carrier group with C158 bolt
- Radian Raptor SD ambidextrous charging handle
- Rise Armament Rev 535 3.5 lb single-stage trigger
- SB Tactical SBA5X pistol brace and Magpul MOE SL grip
- SIG SAUER ROMEO-MSR Gen II red dot with JULIET5 5X magnifier
- Inforce WML Gen 3 weapon light – 450 lumens
- Magpul MS1 QDM two-point sling with STNGR QD M-LOK mount
What’s Included
Upper
- AT3 Slick Side Billet Upper Receiver – Titanium
- Ballistic Advantage 12.5″ 5.56 NATO Government-Profile Barrel – Modern Series
- BCM Gunfighter MCMR 10″ M-LOK Handguard – Black
- Breek Arms Plan B Sentinel Caged Flash Hider – 5.56 NATO, 1/2×28
- STNGR 5.56 Phosphate Chrome-Lined M16 Bolt Carrier Group – C158 Bolt
- Radian Raptor SD Ambidextrous Charging Handle – Black
- Superlative Arms Set Screw Adjustable Gas Block – .750″
- AT3 Carbine-Length Stainless Gas Tube
- AT3 M-LOK Hand Stop – Titanium
- Strike Industries Ultimate Dust Cover – Black
Lower
- AT3 AT-15 Stripped Lower Receiver – Titanium
- Rise Armament Premium Lower Parts Kit – Black
- Rise Armament Rev 535 3.5 lb Single-Stage Trigger – Black
- Magpul MOE SL Pistol Grip – Black
- SB Tactical SBA5X Pistol Brace – Black
- AT3 Mil-Spec Buffer Tube – Black
- AT3 Carbine Buffer – 3.0 oz
- AT3 Carbine Buffer Spring
- AT3 Castle Nut – Black
- AT3 Mil-Spec End Plate – Black
Optics and Accessories
- SIG SAUER ROMEO-MSR Gen II Red Dot with JULIET5 5X Magnifier
- Inforce WML Gen 3 Weapon Light – 450 Lumens, Black
- Magpul MS1 QDM Two-Point Sling – Black
- STNGR QD M-LOK Sling Mount
- STNGR Cyclops 3-Slot M-LOK Rail Covers – 3-Pack, Black
- Two Magpul M-LOK Rail Cover Type 1 – Gray
- Cole-TAC HTP 6″ Suppressor Cover Wrap – Black
- Magpul PMAG M2 MOE Window 30-Round 5.56 NATO Magazine – Black
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Warranty & returns
Backed by the AT3 Lifetime Warranty!

All AT3 Tactical Brand Products carry a lifetime warranty against manufacturer’s defects.
This includes AT3 Red Dot Sights, Handguards, Iron Sights, and any other product that carries the “AT3 Tactical” or “AT3™” name. For other brands (ex. Magpul or Troy), please refer to the manufacturer’s warranty policy.
In the event that your AT3™ product becomes unusable, we will repair or replace the product at no charge to you.
If we cannot repair your product, we will replace it with a product in perfect working order of equal or better physical condition. The warranty is fully transferable, but we may require information about the original purchase to validate the authenticity of the product.
If your product is in need of warranty service, please contact AT3 Tactical to start the process
Our contact info is available here. To expedite processing, please provide your order information and description of the defect.
Please note: The AT3 Lifetime Warranty does not cover loss, theft, intentional damage or cosmetic damage that doesn’t affect the performance of the product.