TacFire BU-45ACP-16 Rifle Upper Assembly 45 ACP Caliber with 16" Black Nitride Barrel, Black Anodized 7075-T6 Aluminum Receiver & M-LOK Handguard for AR-Platform Includes Bolt Carrier Group BU45ACP16

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) Lube & Inspect: Lightly oil the BCG/rails; check handguard, barrel nut, and fasteners for proper torque. Function Test: Validate last-round bolt hold-open (LRBHO) if your lower supports it; adjust buffer weight if ejection is erratic. Zero Smart: A 25–50 yard zero is practical for .45 ACP; verify holds at your typical training distances. 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. SEO-Friendly Search Terms TacFire .45 ACP AR upper 16 inch, BU-45ACP-16, BU45ACP16, 729205516054, 45 ACP AR-15 upper with BCG, black nitride 16" .45 barrel, 7075-T6 anodized receiver .45 upper, free-float M-LOK .45 ACP upper, Glock-mag .45 AR upper, 1911-mag AR-45 upper assembly. 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. The End