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BRT 8.3" PDW Upper Receiver Group

5.0

1 review

Reviews from verified customers who have purchased products at this store.

SKU URG-8.3-300BLK

$725.00

Barrel

BRT 8.3" OPTIMUM HF CL (15.0oz) 300 BLK (+$325.00)

BRT 8.3" OPTIMUM HF CL (15.0oz) 300 BLK - small port requires suppressor (+$335.00)

BRT 8.3" OPTIMUM HF CL (15.1oz) 556 NATO (+$250.00)

Hand Guard

7.0" M-LOK (+$110.00)

7.125" CMT UHPR MOD4 QUAD / M-LOK (+$185.00)

7.25" SLR ZRO M-LOK (+$285.00)

Mil-Spec Barrel Nut only ( no HG ) (+$15.00)

Mil-Spec Barrel Nut, Delta Ring, Round HG Cap, BRT Snap Ring ( drop in ready ) (+$35.00)

User Supplied Hand Guard (+$25.00)

Gas Block

Pinned - BRT MicroPinHD .750

Muzzle Device

A2 (+$15.00)

Covert Comp (+$60.00)

Q Cherry Bomb (+$85.00)

User Supplied Muzzle Device (+$25.00)

None

Install Shimmed Muzzle Device

Yes (+$25.00)

Bolt Carrier Group

None

BRT M4A1 BCG (+$160.00)

Charging Handle

None

Add USGI Charging Handle (+$20.00)

Lead Time

I understand this is Built to Order ( 4+ Weeks )

3 available

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Customer reviews

Reviews only from verified customers

Reviews are only accepted from verified customers who have signed in and purchased the products. This ensures that each review is based on genuine customer experiences. All reviews are checked before publication to prevent spam.

Sel B.

Wading River,

United States

Aug 16, 2025

This is my third upper from BRT and I’m once again floored by the fit and finish of the build quality. I will always recommend BRT to anyone in need of an URG for their ARs.

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BRT 8.3" PDW Upper Receiver Group

Product Details

BRT 8.3" OPTIMUM PDW Upper Receiver Group

Barrel: BRT OPTIMUM 8.3" HF CL 300 BLK or BRT OPTIMUM 8.3" HF CL 556

Gas System: PISTOL Length, Optimized for 8.3" or BRT EXP Length, Optimized for 8.3"

Hand Guard: 7" M-LOK rail.

Upper: Forged from 7075 USGI M4 Upper w/ dry film lube.

Upper is test fired before shipping.

NFA Rules Apply

100% made is USA.