TacFire BU-45ACP-16 Rifle Upper Assembly — .45 ACP, 16" Black Nitride Barrel, 7075-T6 Receiver, M-LOK® Handguard — Includes Bolt Carrier Group (BU45ACP16 | UPC 729205516054)

Turn your AR into a soft-recoiling, big-bore workhorse. The TacFire BU-45ACP-16 Rifle Upper Assembly mates a 16" black nitride .45 ACP barrel with a rugged 7075-T6 aluminum upper receiver (black anodized) and a slim free-float M-LOK® handguard. Optimized for AR-platform .45 builds, it ships complete with a .45 ACP Bolt Carrier Group (BCG) so you can pin it to a compatible lower, add sights or an optic, and head straight to the range.

Why Choose the TacFire BU-45ACP-16?

• Big-Bore, Low Recoil: .45 ACP delivers authoritative energy with a controllable impulse—great for steel, PCC-style drills, and short-to-mid-range fun.

• 16" Black Nitride Barrel: Nitride hardening improves surface wear resistance, corrosion protection, and simplifies cleanup after high-volume sessions.

• 7075-T6 Strength: Forged receiver resists flex, maintains rail alignment, and holds zero with optics and irons.

• Free-Float M-LOK® Rail: Mount lights, QD sling cups, handstops, and bipods without inducing POI shift.

• BCG Included: A matched .45 ACP carrier/bolt reduces compatibility guesswork and speeds up the build.

Key Features & Specifications

• Model / Part: BU-45ACP-16 (also listed as BU45ACP16)

• UPC: 729205516054

• Caliber: .45 ACP

• Operating System: Typically straight blowback (confirm with your lower/BCG pattern)

• Barrel: 16" steel, black nitride finish, threaded muzzle (common .45 thread pitch is .578-28—verify before buying a device or suppressor mount)

• Receiver: 7075-T6 aluminum, black anodized

• Handguard: Free-float M-LOK®, slim, ventilated, continuous top rail

• Bolt Carrier Group: Included (.45 ACP BCG: bolt, carrier, cam pin, firing pin, retaining pin)

• Charging Handle: May or may not be included — check the retailer’s BOM

• Muzzle Device: Varies by lot — confirm inclusion

• Top Rail: Picatinny for optics/backup irons

Performance You’ll Notice

• Smooth, Trackable Recoil: Blowback .45 with a tuned buffer makes fast follow-ups and target transitions easier.

• Cleaner Running: Nitride treatment resists fouling and wipes clean quickly—perfect for high-round-count practice.

• POI Consistency: Free-floating keeps sling/barricade pressure off the barrel so your zero stays steady.

• Accessory-Ready: Generous M-LOK® slotting supports lights, pressure pads, and sling placements exactly where you want them.

Ideal Use Cases

• Range & Training: Affordable, subsonic-friendly .45 ACP with classic AR ergonomics.

• PCC-Style Matches: Soft impulse and fast splits with big-bore authority.

• Home & Property Practice: Maneuverable length and intuitive controls (follow all local laws and use proper PPE).

• Suppressor Builds (where legal): .45 ACP pairs well with cans; verify thread pitch and follow torque specs.

Compatibility & Build Notes

• Lower Receiver: Requires a .45 ACP AR-pattern lower or a reliable mag-adapted system. Common patterns include Glock-mag, 1911-mag, and SMG/Grease-gun-style lowers—match your lower, magazines, and BCG pattern.

• Buffer System: Use a .45-appropriate buffer and spring; many blowback .45s benefit from heavier buffers and durable buffer retainers to moderate bolt speed.

• Magazines: Choose quality mags that match your lower’s pattern for reliable feed geometry.

• Sights/Optics: Mount BUIS or a micro red dot/LPVO; confirm mount height for co-witness and cheek weld.

• Muzzle Devices: Verify .578-28 or other thread pitch before installing brakes, comp devices, or suppressor mounts; re-torque and re-zero after changes.

Setup Tips (Non-Instructional)

1. Lube & Inspect: Lightly oil the BCG/rails; check handguard, barrel nut, and fasteners for proper torque.

2. Function Test: Validate last-round bolt hold-open (LRBHO) if your lower supports it; adjust buffer weight if ejection is erratic.

3. Zero Smart: A 25–50 yard zero is practical for .45 ACP; verify holds at your typical training distances.

4. Cable Management: Use M-LOK® clips or channels to secure pressure switches and reduce snags.

Maintenance & Care

• Bore & Chamber: Nitride simplifies carbon removal—patch with solvent, brush lightly as needed, and re-oil.

• Fastener Checks: Re-check gas-block/handguard screws (if applicable on your variant) and muzzle device torque after break-in.

• Exterior Protection: Wipe anodized/steel surfaces with a corrosion inhibitor after wet or salty exposure.

What’s in the Box*

• TacFire BU-45ACP-16 Rifle Upper Assembly — 16" black nitride .45 ACP barrel, 7075-T6 black-anodized receiver, free-float M-LOK® handguard

• .45 ACP Bolt Carrier Group (BCG) — included
  *Charging handle and muzzle device may be sold separately — verify the retailer’s bill of materials.

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TacFire BU-45ACP-16 Rifle Upper Assembly — .45 ACP, 16" Black Nitride Barrel, 7075-T6 Receiver, M-LOK® Handguard, BCG Included (BU45ACP16 | 729205516054): a durable, big-bore AR top end that blends soft recoil, modern modularity, and plug-and-play convenience—ready for optics, tuned buffers, and your next range day.

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