This TacFire AR Build Kit is a Sports South Exclusive package built around a 45 ACP, 16-inch, nitride-finished barrel from TacFire (brand part no. SSRK45ACPLPK). It bundles a stripped billet upper receiver with M4 feed ramps, a 15-inch slim M-LOK free-float handguard, a birdcage flash hider with crush washer, a matched 45 ACP bolt carrier group, and a complete USA-made lower parts kit, giving builders nearly everything needed to finish a 45 ACP AR-platform rifle in one purchase. It’s built for shooters who want a caliber-matched, ready-to-assemble kit rather than sourcing each component separately.

Key Specifications

• Includes a 45 ACP, 16-inch, nitride-finished barrel.
• Comes with a birdcage flash hider and crush washer.
• Includes a 15-inch slim M-LOK free-float handguard.
• Comes with a stripped billet upper receiver with M4 feed ramps, machined to accept 5.56/.223/.300 AAC Blackout-pattern barrels.
• Includes a 45 ACP bolt carrier group.
• Comes with a complete USA-made lower parts kit.
• Sold as a Sports South Exclusive build kit.

Frequently Asked Questions

What caliber is this build kit chambered for? 45 ACP, with a 16-inch nitride-finished barrel.

Does the kit include the lower parts kit? Yes, a complete USA-made AR-15 lower parts kit is included.

Buy the TacFire 45 ACP AR Build Kit

Build a complete 45 ACP AR-platform rifle around this TacFire Sports South Exclusive kit. It ships fast from our Lubbock, Texas gun shop, and our AR15 build kits selection has more build kits to compare.