TacFire BU-308-20 Rifle Upper Assembly 308 Win Caliber with 20" Black Nitride Barrel, Black Anodized 7075-T6 Aluminum Receiver & M-LOK Handguard for AR-Platform Includes Bolt Carrier Group BU30820

TacFire BU-308-20 Rifle Upper Assembly — .308 Win, 20" Black Nitride Barrel, 7075-T6 Receiver, M-LOK® Handguard — Includes Bolt Carrier Group (BU30820 | UPC 729205502378) Build a long-range, hard-hitting .30-cal AR the smart way. The TacFire BU-308-20 Rifle Upper Assembly delivers a precision-minded .308 Winchester top end with a 20" black nitride barrel, a rugged 7075-T6 aluminum receiver finished in black anodize, and a slim, free-float M-LOK® handguard for modern accessory mounting. Best of all, it includes a Bolt Carrier Group (BCG)—so you can skip the parts hunt and head to the range sooner with a matched, reliable system. Why Choose the TacFire BU-308-20 Upper? 20" Accuracy Advantage: Extra barrel length wrings out velocity for heavier .308 loads, flattens trajectory, and tightens wind drift—ideal for hunting and steel out to distance. Black Nitride Barrel: Enhanced wear and corrosion resistance inside and out; easier carbon cleanup versus untreated steel. 7075-T6 Strength: Forged receiver provides superior strength-to-weight for a durable, duty-ready build. Free-Float M-LOK® Rail: Keep the barrel free from external pressure while mounting lights, bipods, QD cups, and handstops exactly where you want them. BCG Included: A matched .308/7.62 carrier and bolt simplify headspace considerations and promote reliable cycling. Key Features & Specifications Model / Part: BU-308-20 (also listed as BU30820) UPC: 729205502378 Caliber: .308 Winchester (7.62×51 NATO use depends on chamber spec; verify ammunition compatibility) Barrel: 20", black nitride finish, threaded muzzle (commonly 5/8x24—confirm before buying a device) Gas System: Rifle-length configuration typical for 20" .308 barrels (verify exact spec with seller) Receiver: 7075-T6 aluminum, black anodized Handguard: Free-float M-LOK®, slim profile with continuous top rail Bolt Carrier Group: Included (.308/7.62 BCG with bolt, carrier, cam pin, firing pin, retaining pin) Charging Handle: Check retailer BOM (often sold separately) Muzzle Device: Varies by lot—confirm inclusion Performance You’ll Notice Extended-Range Precision: 20" barrel length improves muzzle velocity for 155–178gr bullets, helping stabilize flight and reduce vertical spread. Cleaner Running: The nitride bore sheds fouling more easily, cutting down time on the cleaning rod. Steady Point of Impact: Free-float rail prevents sling/bipod pressure from shifting zero when you load into barricades or tripods. Accessory-Ready: M-LOK® slots at 3/6/9 (and often 45°) let you place a bipod, Arca adapter, white light, or handstop without bulk. Ideal Use Cases Big-Game & Predator Hunting: Pair with a 2-10× or 3-15× optic for confident, ethical shots across mixed terrain. Practical Precision / DMR-Style Builds: Ring steel from 300 to 800+ yards with quality ammo and good dope. Ranch / Property Rifle: Robust finishes and modular rail for lights and slings in all weather. Compatibility & Build Notes Lower Receiver Pattern: Use with a compatible AR-10/.308 AR lower (commonly DPMS/LR-308 pattern). Confirm your lower’s pattern, rail height, and barrel-nut/handguard compatibility. Buffer System: Install a .308-specific buffer, spring, and tube; tune buffer weight for proper ejection/lock-back with your ammo. Magazines: Choose reliable SR-25/DPMS-pattern .308 magazines for consistent feeding. Muzzle Devices / Suppressors: Confirm thread pitch; re-torque and re-zero after installing brakes, flash hiders, or mounts. Optics & Sights: The continuous top rail supports LPVOs, mid-power scopes, or BUIS; verify mount height for eye relief and cheek weld. Setup Tips (Non-Instructional) Lube & Inspect: Lightly oil the BCG and contact surfaces before first range trip; verify gas-block and handguard fasteners. Ammo Selection: Start with proven .308 loads (150–175gr) to baseline accuracy; then tailor for hunting or match needs. Zero Smart: A 100-yard zero is versatile; confirm drops at 200/300/400+ for your specific bullet. Manage Recoil: Consider a quality brake or suppressor (where legal) plus buffer tuning for faster follow-ups and easier spotting. Torque Discipline: Follow spec on scope rings, mounts, and muzzle devices to preserve accuracy. Maintenance & Care Nitride Ease: Patch the bore with solvent and a few passes of a nylon/bronze brush as needed; apply a light oil film after cleaning. Fastener Checks: Re-check handguard clamp/barrel nut and gas-block screws after break-in. Exterior Protection: Wipe metal with a corrosion inhibitor after wet or salty exposure. What’s in the Box* TacFire BU-308-20 .308 Win Upper — 20" black nitride barrel, 7075-T6 black-anodized receiver, free-float M-LOK® handguard .308/7.62 Bolt Carrier Group (BCG) — included *Charging handle and muzzle device may be sold separately—verify the retailer’s bill of materials. SEO-Friendly Search Terms TacFire .308 upper 20 inch, BU-308-20, BU30820, 729205502378, AR-10 upper with BCG, .308 Winchester 20" nitride barrel, 7075-T6 black anodized receiver, free-float M-LOK .308 upper, DPMS pattern .308 upper assembly, long-range .308 AR upper, hunting .308 upper 20". TacFire BU-308-20 Rifle Upper Assembly — .308 Win, 20" Black Nitride Barrel, 7075-T6 Receiver, M-LOK® Handguard, BCG Included (BU30820 | 729205502378): a velocity-boosting, accuracy-focused .308 AR upper that blends durability, modularity, and turnkey convenience for hunting, practical precision, and serious range work. The End