TacFire AR Build Kit — .300 Blackout AR Platform, Black Nitride Aluminum, 1/2"-28 tpi — Sports South Exclusive (SSRK300LPK | UPC 745559515215)
Build a high-performance, suppressed-ready AR platform with the TacFire AR Build Kit for .300 Blackout. This Sports South exclusive kit (SSRK300LPK, UPC 745559515215) brings together caliber-specific components, corrosion-resistant finishes, and precision aluminum machining to give builders a reliable foundation for a modern .300 BLK pistol-caliber carbine or SBR. Whether you’re assembling a short-barreled rifle (where legal), a compact patrol carbine, or a dedicated suppressed range rig, this kit streamlines the build process with parts engineered for consistent feeding, smooth operation, and durable service life.
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Product Overview
The TacFire SSRK300LPK AR Build Kit is specifically optimized for the .300 AAC Blackout (300 BLK) cartridge — a versatile round favored for its subsonic/supersonic flexibility and excellent performance in short barrels. Key components are machined from lightweight, aircraft-grade aluminum and finished with a black nitride surface treatment for lower friction, improved corrosion resistance, and a matte tactical look that reduces glare. Included threading at 1/2"-28 tpi makes the kit friendly to a wide range of muzzle devices and sound suppressors designed for common AR-15 style threading.
Key Features & Benefits
Caliber-Specific Engineering — .300 Blackout Ready
Components are selected and tuned for optimal feeding, extraction, and cycling with .300 BLK cartridges in AR-style platforms, improving reliability over one-size-fits-all kits.
Black Nitride Finish
Metal parts receive a durable black nitride treatment that enhances wear resistance, reduces friction for smoother cycling, and provides robust corrosion protection for years of use.
Aircraft-Grade Aluminum Construction
Important non-bearing components are machined from lightweight aluminum to lower overall weight while maintaining structural integrity where it matters most.
1/2"-28 tpi Muzzle Threading
Standard 1/2"-28 threads allow easy attachment of a wide range of muzzle devices and suppressors marketed for AR platforms and .300 BLK, making the kit flexible for both suppressed and unsuppressed builds.
Sports South Exclusive Configuration
The SSRK300LPK SKU represents an exclusive parts package assembled for compatibility and value — perfect for builders who want a curated set without the guesswork.
Optimized for Short Barrels & Suppressed Use
.300 BLK performs exceptionally well in short barrels and with suppressors; this kit’s components are selected to maximize reliability in suppressed, short-barrel installations.
Value & Compatibility
Bundled parts reduce the risk of mismatched components and save time and money versus sourcing individual pieces separately.
Typical Kit Contents (may vary by batch)
Note: Always verify included parts on the product page or packaging. Typical items found in TacFire .300 BLK kits include:
Upper receiver-compatible components (aluminum)
Bolt carrier group or modified BCG components with black nitride finish (steel where required)
Barrel adapter or barrel (threaded 1/2"-28 tpi) or components prepared for 1/2"-28 attachments
Gas system or blowback-compatible hardware depending on kit configuration
Pins, springs, and installation hardware
Manufacturer label: TacFire SSRK300LPK; UPC 745559515215
Technical Specifications (Representative)
Model / SKU: TacFire SSRK300LPK
Caliber: .300 AAC Blackout (300 BLK)
Material: Aircraft-grade aluminum (non-bearing components); steel where required for bolts/BCG, etc.
Finish: Black Nitride
Muzzle Threading: 1/2"-28 tpi (standard AR-style)
Platform: AR-15 style / .300 BLK compatible
Package: Sports South Exclusive
UPC: 745559515215
Compatibility & Use Cases
Ideal for builders creating compact AR-15 style rifles chambered in .300 BLK.
Works well with common AR-15 receivers, .300 BLK magazines, and standard AR furniture.
Suited for suppressed builds — .300 BLK’s subsonic capability pairs exceptionally well with modern suppressors.
Great for home defense builds (where legal), PCC-style competitions, tactical training rigs, and short-range hunting or varmint control.
Installation & Builder Notes
Confirm your lower and upper receiver compatibility before installation; standard AR-15 spec receivers are typically compatible.
If the kit includes a BCG or barrel, ensure torque, headspacing, and timing are verified by a qualified gunsmith.
Threadlocker and the correct torque specs for muzzle devices and barrel nuts are important for safety and performance.
When suppressing a .300 BLK build, verify suppressor thread compatibility (this kit’s 1/2"-28 tpi is a common standard), and follow all local, state, and federal regulations.
Why Choose TacFire SSRK300LPK
TacFire has a reputation for offering dependable parts at value-oriented prices. The SSRK300LPK Sports South exclusive bundle removes guesswork from the parts selection process by delivering a matched kit purpose-built for .300 BLK performance. With black nitride finishes and precision aluminum machining, this kit balances durability, reduced weight, and a tactical aesthetic—helping you get to a finished, functioning AR-15 style .300 Blackout platform faster.
Safety & Legal Notice
This product is intended for use by legally eligible firearm owners and licensed builders. Firearm laws vary significantly by jurisdiction — it is the buyer’s responsibility to ensure compliance with all federal, state, and local laws, including those governing short-barreled rifles (SBRs), suppressors, and manufacturing firearm assemblies. This description does not constitute legal advice or assembly instructions. Always follow safety best practices, consult manufacturer documentation, and seek a qualified gunsmith for installation and compliance questions.
Purchase & Support
For the exact list of included parts, up-to-date inventory, and retailer support, confirm product details at Sports South or the authorized seller before purchasing. Use SKU SSRK300LPK and UPC 745559515215 when verifying package contents to ensure you receive the Sports South exclusive configuration.
Final Thought
If you’re building a compact, suppressed-ready AR platform chambered in .300 Blackout and want a parts package tuned for consistent performance, the TacFire AR Build Kit — .300 Blackout (SSRK300LPK) offers a reliable, value-oriented starting point with corrosion-resistant black nitride finishes, lightweight aluminum components, and standard 1/2"-28 threading for broad suppressor compatibility. Start your build with a kit designed to simplify assembly and deliver dependable function.
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