Custom Ultra-Lightweight .300 Blackout AR-15 – Never Fired – Proof Research Carbon Fiber Barrel

Asking Price: $3500.00 OBO

This custom FC Firearms UDR-15 was built with one goal in mind: create an exceptionally lightweight, premium-quality .300 Blackout using top-tier components throughout.

The rifle has never been fired (other than any factory testing) and is in like-new condition.

The heart of the build is a Proof Research 16.5" carbon fiber barrel, paired with premium lightweight components, an Elftmann Tactical trigger, FailZero nickel boron bolt carrier group, BAD titanium gas block, Radian Raptor SD charging handle, Leupold VX-2 1.5–4×28 scope, and a professionally applied custom camouflage Cerakote finish.

Premium Components

• FC Firearms UDR-15 billet receiver set
• Proof Research 16.5" carbon fiber barrel
• Leupold VX-2 1.5–4×28 Scout scope
• Elftmann Tactical 3-Gun trigger
• FailZero lightweight NiB bolt carrier group
• BAD titanium gas block
• Radian Raptor SD ambidextrous charging handle
• Troy folding backup sight
• PWS FSC30 muzzle brake
• Wilson Combat Super Stock
• BCM Gunfighter grip
• Lightweight free-float handguard
• Professionally applied custom camouflage Cerakote

Investment

• Over $5,000 in documented parts and assembly (receipts included)
• Additional $650 invested in the custom Cerakote finish
• Total investment exceeds $5,650

This is not a budget AR or a production rifle. It is a carefully assembled custom build using premium components, designed to be exceptionally light, accurate, and reliable.

Condition: Never fired – Like New

Asking Price: $3,500.00 OBO

No trades. Considered Private AZ Sale

Save over $2,300 compared to the cost of building this rifle today while getting a one-of-a-kind, never-fired custom .300 Blackout.