Spike's Tactical PHU Skull Pistol Lower Build Kit, Polymer AR Brace

Spike's Tactical PHU Skull Pistol Lower Build Kit, Davidson Defense Polymer AR Brace

This is a Spike's Tactical Pipe Hitters Union Skull AR-15 pistol lower build kit built around a Spike's Tactical STLS023 PHU Skull forged 7075-T6 aluminum lower receiver with a MIL-A-8625F Type III Class 2 hard coat anodized black finish, a low shelf trigger pocket with RDIAS compatibility, Spike's Tactical Apopka FL USA roll mark, a Pipe Hitters Union Skull logo with crossbones and MOD PHU CAL MULTI engraving on the magazine well, and ambidextrous Safe and Fire pictogram style selector markings. The complete Mil-Spec AR-15 lower parts kit covers the full internal lower component group with a Mil-Spec single-stage trigger, Mil-Spec safety selector, standard Mil-Spec magazine catch, bolt catch, pivot pin, and takedown pins. An A2 style black textured polymer pistol grip covers the grip interface. The buffer system consists of a heavy-duty black anodized aluminum smooth pistol receiver extension, a standard carbine buffer at 3 oz. in black anodized aluminum, and a standard AR-15 carbine recoil spring made in the USA. A US Tactical AR-15 and M16 Mil-Spec steel receiver end plate in black and an AR-15 Mil-Spec carbine steel castle nut in black complete the rear hardware. A Davidson Defense black reinforced polymer AR brace with a lightweight skeletonized design, a flat end profile, an angled support structure with reinforced bracing geometry, and an integrated ambidextrous QD sling socket closes out the rear end.

Key Features

• Spike's Tactical STLS023 PHU Skull forged 7075-T6 aluminum lower receiver, MIL-A-8625F Type III Class 2 hard coat anodized black
• Low shelf trigger pocket, RDIAS compatible
• Pipe Hitters Union Skull logo with crossbones and MOD PHU CAL MULTI engraving on magazine well
• Ambidextrous Safe and Fire pictogram style selector markings
• Spike's Tactical Apopka FL USA roll mark
• Compatible with 5.56 NATO, .223 Remington, .300 AAC Blackout, 9mm, and other AR-15 compatible calibers
• Complete Mil-Spec AR-15 lower parts kit with Mil-Spec single-stage trigger, Mil-Spec safety selector, standard Mil-Spec magazine catch, bolt catch, pivot pin, and takedown pins
• A2 style black textured polymer pistol grip
• Heavy-duty smooth pistol receiver extension, aluminum, black anodized, AR-15 pistol buffer system compatible
• Standard carbine buffer, 3 oz., aluminum, black anodized
• Standard AR-15 carbine recoil spring, made in the USA
• US Tactical AR-15 and M16 Mil-Spec steel receiver end plate, black
• AR-15 Mil-Spec carbine steel castle nut, black
• Davidson Defense polymer AR brace, black, reinforced polymer, lightweight skeletonized design, fixed, flat end profile, angled support structure with reinforced bracing geometry, integrated ambidextrous QD sling socket, smooth pistol buffer tube compatible

Perfect For

• AR-15 pistol builders sourcing a complete lower build kit on the Spike's Tactical PHU Skull receiver with a Davidson Defense polymer AR brace included
• Shooters pairing this kit with an existing upper assembly who want the PHU Skull lower receiver with a complete Mil-Spec lower parts kit and a lightweight skeletonized brace with an integrated ambidextrous QD sling socket covered in one package
• Builders who want a distinctively marked Spike's Tactical PHU Skull lower receiver with RDIAS compatibility and a Davidson Defense polymer AR brace in one complete pistol lower kit

Lower Receiver

The Spike's Tactical STLS023 PHU Skull lower receiver is precision forged from 7075-T6 aluminum and finished to MIL-A-8625F Type III Class 2 hard coat anodize standards in black. The low shelf trigger pocket is RDIAS compatible. The magazine well carries the Pipe Hitters Union Skull logo with crossbones and a MOD PHU CAL MULTI engraving, and the ambidextrous Safe and Fire pictogram style selector markings appear on both sides of the receiver. The Spike's Tactical Apopka FL USA roll mark is present on the receiver body. The receiver accepts standard Mil-Spec AR-15 components and is compatible with 5.56 NATO, .223 Remington, .300 AAC Blackout, 9mm, and other AR-15 compatible calibers.

Lower Parts Kit and Buffer System

The complete Mil-Spec AR-15 lower parts kit covers the full internal lower component group, including the Mil-Spec single-stage trigger, Mil-Spec safety selector, standard Mil-Spec magazine catch, bolt catch, pivot pin, and takedown pins. An A2 style black textured polymer pistol grip covers the grip interface. The heavy-duty black anodized aluminum smooth pistol receiver extension houses the buffer system at the rear of the lower, matched to the AR-15 pistol platform. The standard carbine buffer at 3 oz. in black anodized aluminum and standard AR-15 carbine recoil spring made in the USA sit within the pistol receiver extension and complete the rear buffer hardware. The US Tactical AR-15 and M16 Mil-Spec steel receiver end plate in black and AR-15 Mil-Spec carbine steel castle nut in black lock the pistol receiver extension down cleanly at the rear of the receiver. The Davidson Defense black reinforced polymer AR brace mounts directly onto the smooth pistol receiver extension and closes out the rear end with a lightweight skeletonized design, a flat end profile, an angled support structure and reinforced bracing geometry for structural integrity, and an integrated ambidextrous QD sling socket that accepts push-button QD sling swivels for quick-detach sling attachment on either side of the brace body. The all-black finish across the lower receiver, pistol grip, and Davidson Defense polymer AR brace gives this lower kit a clean and consistent exterior throughout.

Follow safe handling and manufacturer instructions. Ensure compliance with all applicable federal, state, and local laws.