Daniel Defense Rankin Industries 300s Pistol

Product Description

The Daniel Defense Rankin Industries 300s Pistol is a purpose-built .300 AAC Blackout platform engineered for serious shooters. Western Sport’s Rankin Industries custom shop hand-assembles this pistol around genuine Daniel Defense components, ensuring quality and reliability from day one.

Furthermore, every Daniel Defense firearm undergoes rigorous quality assurance testing and is test-fired before shipment. This commitment to craftsmanship means you receive a verified, ready-to-run pistol.

The 10.3″ cold hammer forged barrel is optimized specifically for .300 Blackout performance. Additionally, the Daniel Defense RIS III 9.5″ free-float M-LOK handguard features the patented 6-bolt Bolt-Up System for a more secure, repeatable zero. The .300 Blackout cartridge delivers significantly more energy than 5.56 NATO from a short barrel, especially when paired with a suppressor.

Precision Engineered for Performance

This configuration balances firepower, handling, and modularity in a compact package. Whether you’re building a duty pistol or precision platform, the Rankin Industries 300s delivers proven Daniel Defense reliability with local assembly expertise.

Materials & Construction

• Lower Receiver: Daniel Defense Lower Receiver, CNC Machined of 7075-T6 Aluminum, Type III Hard Coat Anodized, with Enhanced Flared Magazine Well and Forward Receiver QD Sling Swivel Attachment Point
• Upper Receiver: Mil-Spec with Indexing Marks and M4 Feed Ramps, CNC Machined of 7075-T6 Aluminum, Type III Hard Coat Anodized
• Barrel: 10.3″ Government Profile, Chrome Moly Vanadium Steel, Cold Hammer Forged, 1:7 Twist Tuned for .300 Blackout, Salt Bath Nitride Treated, HP/MPI Tested
• Gas System: Pinned Low-Profile Gas Block, CNC Machined of 4140 Hardened Steel, Mil-Spec Heavy Phosphate Coating, Pistol-Length, Direct Impingement
• Muzzle Device: Daniel Defense Flash Suppressor, 17-4 PH Stainless Steel, Salt Bath Nitride Finished, 5/8×24 TPI Threads
• Handguard: Daniel Defense RIS III 9.5, Patented 6-Bolt Bolt-Up System, CNC Machined of 6061-T6 Aluminum, M-LOK Attachment
• Bolt Carrier Group: M16 Profile Bolt Carrier Group, Mil-Spec MP Tested, Chrome Lined, with Properly Staked Gas Key
• Charging Handle: Daniel Defense GRIP-N-RIP Charging Handle — Body CNC Machined of 7075-T6 Aluminum, Handles & Latch CNC Machined of 6061-T6 Aluminum, Heavy Duty Stainless Steel Roll Pins, Type III Hard Coat Anodized
• Pistol Grip: Daniel Defense Pistol Grip, Glass-Filled Polymer with Soft-Touch Overmolding and Internal Storage Compartment
• Stabilizing Brace: SB Tactical SBA3 Pistol Stabilizing Brace, Adjustable Across 5 Positions, Mounted on Daniel Defense’s 1.15″ Diameter Pistol Receiver Extension

Specifications

This pistol ships from the factory with an SB Tactical pistol stabilizing brace attached to a pistol-length receiver extension, configured as a firearm — not a rifle. A 2024 federal court ruling vacated ATF’s 2023 rule that reclassified braced pistols as Short-Barreled Rifles (SBRs), and the government dropped its appeal of that ruling in 2025. As a result, a stabilizing brace alone no longer causes a pistol to be treated as an SBR under the National Firearms Act (NFA). As of 2026, ATF has proposed formally removing the old ‘redesigned to be fired from the shoulder’ factoring criteria, with public comments open through August 4, 2026. As configured and shipped, this pistol requires no NFA registration or tax stamp — only the standard ATF Form 4473 background check at transfer. Permanently configuring this firearm with a shoulder stock, however, would create an SBR requiring an approved ATF Form 1 before modification. Western Sport cannot advise on individual compliance — buyers are responsible for following all applicable federal and state law.

Why Buy from Western Sport?

• Western Sport’s Rankin Industries shop assembles every rifle with meticulous attention to detail.
• Our knowledgeable staff provides expert advice on Daniel Defense configurations and upgrades.
• Competitive pricing reflects direct relationship with Daniel Defense and volume purchasing power.
• After-sale support includes technical guidance, upgrade recommendations, and accessory compatibility assistance.
• Local inventory means fast fulfillment and immediate availability for qualified buyers.

Frequently Asked Questions

Q: What ammunition performs best in the .300 AAC Blackout from this 10.3″ barrel?

A: Both supersonic and subsonic loads work well in this configuration. Subsonic rounds truly shine when paired with a suppressor, delivering reliable cycling and exceptional sound reduction. Consult ammunition manufacturers for load data optimized for 10.3″ barrels.

Q: Which optics and accessories mount to the Daniel Defense RIS III M-LOK handguard?

A: The M-LOK slots accept any M-LOK-compatible light, vertical grip, or rail section. Red dots mount directly to a standard upper receiver picatinny rail or via M-LOK optic mounts. Slings, pressure pads, and offset mounts all work seamlessly with this handguard.

Q: How does the 6-bolt Bolt-Up System on this handguard improve performance?

A: The patented 6-bolt design creates a more secure, repeatable zero by distributing clamping pressure evenly. This reduces rail shift from recoil and thermal cycling. The result is tighter grouping and longer-term zero stability during extended shooting sessions.

Q: What is included in the box, and what is Western Sport’s return policy?

A: Your pistol ships fully assembled with the stabilizing brace attached, ready for a 4473 background check. Contact Western Sport directly for detailed warranty coverage, return timelines, and any questions about your specific purchase.

Q: What is the RIS III rail system on this pistol?

A: The RIS III is Daniel Defense’s next-generation free-float handguard. It uses a patented 6-bolt Bolt-Up System for a more secure, repeatable zero than older quad-rail designs. Furthermore, M-LOK slots run along the rail for mounting lights, lasers, and grips.

Q: Will I need to file ATF paperwork or pay a tax stamp for this pistol’s brace?

A: No. As configured and shipped, this is a pistol with a stabilizing brace — not a Short-Barreled Rifle (SBR). ATF’s 2023 rule treating braced pistols as SBRs was vacated by federal courts in 2024, and the government dropped its appeal in 2025. Only the standard ATF Form 4473 background check applies at transfer, the same as for any other pistol.

Additional information