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BRT 13.9" OPTIMUM Upper Receiver Group

SKU URG-13.9-HFCL

$725.00

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Barrel

BRT 13.9" OPTIMUM HF CL (23.7oz) (+$325.00)

Hand Guard

12.6" WOA TR M-LOK (+$140.00)

13" CMT HDM M-LOK (+$155.00)

12.5" CMT UHPR MOD4 HDX QUAD / M-LOK (+$200.00)

13.1" SLR HDX M-LOK (+$295.00)

13.1" SLR ZRO M-LOK (+$320.00)

User Supplied Hand Guard (+$25.00)

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

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

Gas Block

BRT MicroPin .750

Pin Gas Block

Yes (+$40.00)

Muzzle Device

A2 (+$15.00)

Covert Comp (+$60.00)

Long Covert Comp ( for pin to 16" ) (+$70.00)

Q Cherry Bomb (+$85.00)

User Supplied Muzzle Device (+$25.00)

None

Install Shimmed Muzzle Device

Yes (+$25.00)

Pin and Weld Muzzle Device

Yes (+$85.00)

Bolt Carrier Group

None

BRT M4A1 BCG (+$160.00)

Charging Handle

None

USGI Charging Handle (+$20.00)

Lead Time

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

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BRT 13.9" OPTIMUM Upper Receiver Group

Product Details

BRT 13.9" OPTIMUM Upper Receiver Group

Barrel: BRT OPTIMUM 13.9" HF CL or BRT OPTIMUM 14.5" SR CL

Gas System: Mid Length, optimized for 13.9"

Hand Guard: 12.6", 13" MLOK 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.

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