TacFire BU3087 308 Winchester 7 Inch Pistol Upper Assembly MLOK Handguard with BCG UPC 729205708985
Product Description
The TacFire® 7" .308 Winchester Complete Pistol Upper Assembly with Bolt Carrier Group (SKU: BU3087 / UPC: 729205708985) delivers maximum compact firepower engineered specifically for specialized CQB, vehicle defense, and ultra-short large-frame AR pistol configurations. Purpose-built around the potent .308 Win / 7.62x51mm NATO cartridge, this assembly arrives fully equipped from the factory with a dedicated large-frame bolt carrier group and charging handle, eliminating guesswork and providing uncompromising cycling authority right out of the box.
The flat-top upper receiver is engineered from high-strength aluminum alloy and hardcoat anodized to MIL-A-8625 Type III Class 2 specifications, defending internal carrier pathways against high-pressure bolt thrust, abrasive carbon fouling, and harsh chemical cleaners. Seated inside is an aggressive 7-inch barrel machined from 4150 Chrome Moly Vanadium (CMV) steel and treated with a Salt Bath Nitride / QPQ Melonite surface conversion. This metallurgical process ensures extreme case-hardening, thermal throat resilience, and superior corrosion resistance. The 1:10" twist rate stabilizes heavy .30-caliber duty and match projectiles, while the standard 5/8x24 TPI muzzle interface accommodates standard .30-caliber flash hiders, compensators, and suppressor mounts.
Surrounding the barrel and pistol-length gas system is a lightweight, free-floating 6061-T6 aluminum M-LOK® handguard. The free-float geometry completely isolates the barrel from exterior mounting stress, barricade rests, and sling tension to maintain point-of-impact consistency. A full-length Mil-Spec 1913 Picatinny top rail seamlessly bridges the receiver and handguard, offering an ultra-rigid mounting plane for red dots, holographic weapon sights, and tactical weapon lights.
*Armorer Bench Notes & Real-World Staging Guidance:*
Fitment Matrix: Direct fit for DPMS / LR-308 pattern large-frame lower receivers. CRITICAL: Barrel length is 7.0 inches. Legally restricted to dedicated AR pistol lowers or registered NFA Form 1/4 Short-Barreled Rifles (SBR). Never assemble onto a receiver with a buttstock installed unless registered. Threaded 5/8x24 TPI; torque all muzzle devices to 20–25 ft-lbs using precision shims if mounting sound suppressors. Requires heavy .308 carbine buffer or adjustable gas tuning to balance extreme port pressure. Includes factory-fitted .308 BCG and charging handle.
- Ensure the host firearm lower receiver is completely clear, magazine removed, and chamber visually and physically verified empty.
- Inspect the bolt carrier group and charging handle, remove transit packaging lubricants, and generously apply premium synthetic weapons oil to the carrier contact rails, cam pin, and gas rings.
- Install the charging handle and .308 BCG into the upper receiver raceway, sliding the assembly into full battery engagement.
- Align the upper assembly's pivot pin lug with your host DPMS-pattern lower receiver, insert the front takedown pin, lower the rear lug into the receiver pocket, and lock the rear pin in place.
- Cycle the action manually several times, confirm positive bolt catch engagement on an empty magazine, and perform a complete dry-fire trigger and safety function check before live-fire staging.
Key Features
- Factory-Complete Package: Arrives ready-to-run with a dedicated large-frame .308 bolt carrier group and standard charging handle.
- 4150 CMV Nitride Barrel: Salt Bath Nitride (QPQ) treated 7" barrel provides extreme wear and heat protection under aggressive firing schedules.
- 1:10" Twist Stabilization: Optimally stabilizes standard 147gr, 150gr, and heavy 168gr/175gr .30-caliber tactical match projectiles.
- Free-Float M-LOK® Handguard: Rigid 6061-T6 aluminum rail ensures modular accessory attachment without barrel deflection.
- Pistol-Length Direct Impingement: Engineered to optimize port pressure and cycling efficiency within a compact 7-inch barrel geometry.
- Standard 5/8x24 Muzzle Pitch: Factory-fitted with an A2 birdcage flash hider and ready for standard .30-caliber muzzle brakes or suppressor mounts.
Product Specifications
- Brand: TacFire®
- Model/Series: 7" .308 Winchester Complete Pistol Upper Assembly with BCG
- MPN / SKU: BU3087 / BU-308-7
- UPC: 729205708985
- Caliber: .308 Winchester / 7.62x51mm NATO
- Barrel Length: 7.0 Inches
- Barrel Material: 4150 Chrome Moly Vanadium (CMV) Steel
- Barrel Finish: Salt Bath Nitride / QPQ Melonite
- Barrel Twist Rate: 1:10"
- Gas System Length: Pistol-Length (.750" Gas Block Journal)
- Muzzle Thread Pitch: 5/8x24 TPI
- Bolt Carrier Group: Included (.308 Win / DPMS Pattern Complete BCG)
- Charging Handle: Included (Mil-Spec Standard .308)
- Receiver Material: Billet / Forged Aircraft-Grade Aluminum
- Receiver Finish: MIL-A-8625 Type III Class 2 Hardcoat Anodized
- Handguard: Free-Float Slim M-LOK® 6061-T6 Aluminum
- Platform Compatibility: DPMS / LR-308 Pattern Lower Receivers
- Country of Origin: USA / Imported Components
