"Hush" Suppressor-Ready 5.56 11.5" AR-15 - Upper - Team Dream Build
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“Hush” Suppressor-Ready 5.56 11.5″ AR-15 Upper Kit – Team Dream Build
Features
- Suppressor-ready 5.56 upper kit based on the Hush Team Dream Build configuration
- 11.5″ Rosco Manufacturing K9 barrel keeps the upper compact while still supporting serious 5.56 use
- Patrol-length gas system and adjustable gas block allow tuning for suppressed and unsuppressed shooting
- KAK K-SPEC downward-venting BCG helps redirect gas and debris away from the shooter when running suppressed
- Radian Raptor SD charging handle adds ambidextrous control with gas-mitigation features
- Dead Air KeyMicro flash hider sets the upper up for compatible Dead Air suppressor mounting systems
- Midwest Industries 10.5″ Slim Line M-LOK handguard provides a clean front end with room for accessories
- C&H Precision STRYKR red dot gives the upper a fast close-range optic package
- Mission First Tactical short vertical grip and AT3 QD sling mount add practical support-hand and sling setup options
The “Hush” Suppressor-Ready 5.56 11.5″ AR-15 Upper Kit is built around a rugged short 5.56 setup made to run with a suppressor. The Rosco K9 barrel, adjustable gas block, KAK downward-venting BCG, and Radian Raptor SD charging handle all support the main goal of the build: making suppressed 5.56 more manageable without switching to .300 Blackout. It is not the lightest upper in the lineup, but the parts were chosen for gas control, durability, and a tough compact profile.
Note: This product page is for the upper kit only. The matching Hush Suppressor-Ready 5.56 lower kit is sold separately and can be paired with this upper, but assembling these components in the intended Dream Build configuration creates a short-barreled rifle. NFA rules and processes apply, and it is the purchaser’s responsibility to ensure any final configuration complies with all applicable federal, state, and local laws before assembly.
Kit Note: This product is sold as a parts kit, and final assembly is up to the purchaser. Parts and accessories are subject to change due to unforeseen shortages, compatibility updates, or compliance changes. Any substitutions will be of equal or greater value and will be noted in this product listing.
Specifications
- Build: Hush Suppressor-Ready 5.56 11.5″ AR-15 Upper Kit
- Platform: AR-15
- Caliber: 5.56 NATO
- Barrel Length: 11.5″
- Gas System: Patrol-Length
- Gas Block: Adjustable, .750″
- Handguard Length: 10.5″
- Handguard Type: Free Float M-LOK
- Upper Receiver: Forged AR-15 Stripped Upper Receiver
- Bolt Carrier Group: KAK K-SPEC Downward-Venting 5.56 BCG with C158 Bolt
- Charging Handle: Radian Raptor SD Ambidextrous AR-15 Charging Handle
- Muzzle Device: Dead Air KeyMicro Flash Hider
- Muzzle Device Thread Pitch: 1/2×28
- Optic: C&H Precision STRYKR Red Dot Sight
- Front Sight: Magpul MBUS Front Back-Up Sight
- Rear Sight: Magpul MBUS Rear Back-Up Sight
What’s Included
Upper Assembly Components:
- AT3 Forged AR-15 Stripped Upper Receiver
- Rosco Manufacturing K9 Barrel – 11.5″ – 5.56 NATO – Patrol-Length
- Midwest Industries Slim Line Free Float AR-15 Handguard – M-LOK – 10.5″
- Wojtek Adjustable Gas Block – .750″ w/Wrench kit
- Rosco Manufacturing Melonite Gas Tube – Patrol-Length
- AT3 AR-15 Gas Tube Roll Pin
- KAK Industry K-SPEC Downward Venting 5.56 BCG with C158 Bolt – Chrome
- Radian Raptor SD Ambidextrous AR-15 Charging Handle
- Dead Air KeyMicro 1/2×28 .22 Caliber Flash Hider
- AT3 AR-15 Forward Assist
- AT3 AR-15 Ejection Port / Dust Cover Assembly
Optics, Sights & Accessories:
- C&H Precision STRYKR Red Dot Sight – Picatinny – Multi-Reticle – 3 MOA / 33 MOA
- Magpul MBUS Front Back-Up Sight
- Magpul MBUS Rear Back-Up Sight
- AT3 M-LOK Quick Detach Sling Mount
- Mission First Tactical REACT Short Vertical Grip – Picatinny
- AT3 M-LOK Rail Section – 7 Slot
- Streamlight ProTac Railmount 2L Dedicated Fixed Mount Long Gun Light – 625 Lumens
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Questions & Answers
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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.
90-day no-hassle returns
The AT3 Tactical store has a 90 day no-hassle return policy for products in good condition. You can view the full details of our return policy here.
If you encounter an issue or defect with a product after 90 days of your purchase, you can refer to the manufacturer for a warranty claim. Their policies are below.

