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The Phase 5 WSI Complete Forged Upper Assembly is purpose-built for those who demand flawless performance, maximum durability, and mission-ready reliability. Every component is hand-assembled with elite attention to detail, ensuring the same level of performance we expect from our personal defense systems. When failure is not an option, this upper won't let you down.

✅ A3 Forged Upper Receiver – 7075-T6 Aluminum

Built from mil-spec, high-strength 7075-T6 aluminum, this A3 forged upper provides:

• ✅ Superior structural integrity

• ✅ Lightweight, rugged durability

• ✅ Mil-spec compatibility for easy integration

Your foundation for a rock-solid AR pistol platform.

✅ ROSCO 7.5" M4 Profile Barrel – 4150 CMV Steel

Outfitted with a high-performance 7.5" barrel, this setup features:

• ✅ 4150 Chrome Moly Vanadium steel for long barrel life

• ✅ 1:7 twist rate optimized for a wide range of bullet weights

• ✅ Threaded 1/2 x 28 TPI for suppressors or muzzle device upgrades

Precision-crafted for accurate and dependable shooting.

✅ Chambered in 5.56 NATO

Versatile and battle-proven, this upper fires 5.56 NATO, giving you:

• ✅ Compatibility with both .223 Rem and 5.56 NATO rounds

• ✅ Reliable function in both defense and training scenarios

✅ Black Phosphate BCG – Chrome Lined for Reliability

Includes a fully assembled AR-15 bolt carrier group with:

• ✅ Black phosphate exterior for corrosion resistance

• ✅ Chrome-lined interior for smooth cycling and easy cleaning

• ✅ Built to handle high round counts and rapid fire

✅ LPSNx7.5 Free-Float Handguard

Phase 5’s proprietary 7.5" LPSNx free-float rail provides:

• ✅ Improved barrel harmonics for better accuracy

• ✅ Multiple attachment points for accessories

• ✅ Lightweight, slim profile for improved handling

✅ littleBOY556 Muzzle Device

Fitted with the aggressive and effective Phase 5 littleBOY556 muzzle brake, offering:

• ✅ Reduced recoil and muzzle rise

• ✅ Compact design that complements the barrel length

✅ .750 Lo Profile Clamp-Style Gas Block & Pistol-Length Gas System

Configured for optimal performance with:

• ✅ A secure clamp-style gas block to prevent shifting

• ✅ Pistol-length gas system tuned for short barrel operation

• ✅ Smooth cycling and reduced wear on internals

✅ DLCH15 Charging Handle Included

Features the Phase 5 DLCH15 charging handle, giving you:

• ✅ Fast, ambidextrous-style operation

• ✅ Solid grip and smooth pull every time

✅ Key Specs at a Glance:

• ✅ Caliber: 5.56 NATO (.223 compatible)

• ✅ Barrel: 7.5" ROSCO M4 Profile, 4150 CMV, 1:7 Twist, 1/2x28 TPI

• ✅ Receiver: A3 Forged 7075-T6 Aluminum

• ✅ Rail: LPSNx7.5 Free-Float Handguard

• ✅ Muzzle Device: littleBOY556

• ✅ Gas System: Pistol Length w/ .750 Clamp-Style Gas Block

• ✅ BCG: AR-15 Chrome Lined, Black Phosphate

• ✅ Charging Handle: DLCH15

• ✅ Includes FREE SHIPPING + Pin Set

Whether you're building a compact AR pistol for personal defense, range fun, or tactical use, the Phase5 5.56 NATO 7.5" Complete Forged Pistol Upper Assembly delivers combat-ready performance straight out of the box.

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