HM Defense RaiderMC556 — 5.56 NATO/.223, 9.5" AR Pistol, Monobloc Barrel, Free-Float Rail (HMP15FMB556C | UPC 854164007425)

Compact, rugged, and engineered for reliability, the HM Defense RaiderMC556 is a premium 5.56 NATO/.223 AR-pattern pistol centered around HM’s patented Monobloc technology. The 9.5" match-grade barrel features an integrally machined gas block and 1/2x28 threaded muzzle—delivering excellent barrel harmonics, fewer failure points, and dependable cycling in a maneuverable package. A free-floating handguard with Picatinny top rail and M-LOK® slots gives you rock-solid mounting for lights, lasers, and grips, while forged 7075-T6 receivers and a hard-use finish round out a pistol built to run. Hinterland Outfitters+1

Why Shooters Choose the RaiderMC556

• Monobloc barrel advantage: Gas block is machined directly into the 4150 CMV barrel, improving alignment and robustness while supporting excellent accuracy and reliability. Hinterland Outfitters+1

• Compact 9.5" performance: Optimized for tight spaces, vehicle work, and PCC-style training—without giving up function thanks to HM’s gas system tuning. Classic Firearms

• Free-float M-LOK® front end: 8.5" handguard with Picatinny top rail and M-LOK mounting keeps accessories secure without influencing POI. Hinterland Outfitters+1

• Built for hard use: Forged 7075-T6 upper and lower with hard coat anodizing; match-grade, triple-honed, button-rifled barrel for consistent groups. Hinterland Outfitters

• Ready to accessorize: 1/2x28 threads accept brakes, comps, or suppressors (where legal). Always verify alignment and re-zero after changes. Hinterland Outfitters

Key Specifications

• Model: HM Defense RaiderMC556

• Caliber: .223 Rem / 5.56 NATO (30+1 capacity) Hinterland Outfitters

• Barrel: 9.5" match-grade Monobloc, 4150 Chromoly, 1/2x28 TPI; carbine-length gas system; threaded muzzle Hinterland Outfitters+1

• Handguard: 8.5" free-floating rail, Picatinny top + M-LOK slots, 6061-T6 aluminum Hinterland Outfitters

• Receivers: 7075-T6 forged upper & lower, hard-coat anodized Hinterland Outfitters

• UPC / SKU: 854164007425 / HMP15FMB556C Palmetto State Armory

• Overall type: Semi-automatic AR pistol (ships with one magazine; configuration may vary by retailer) Hinterland Outfitters

At-a-Glance: The RaiderMC556 SKU HMP15FMB556C and UPC 854164007425 appear across multiple retailers, confirming the configuration and core feature set above. Palmetto State Armory+1

Performance You Can Feel

• Smoother cycling & durability: The integrated gas block reduces leak points and alignment issues common to pinned blocks, contributing to consistent function and longevity. Hinterland Outfitters

• Stay on the dot: Free-float rail and tuned barrel deliver repeatable POI—even with lights and stops attached—so you can track impacts and make fast corrections. Hinterland Outfitters

• Accessory-friendly: Picatinny + M-LOK real estate and the threaded muzzle make it simple to tailor for home defense, range work, or low-light training. Hinterland Outfitters

Setup Tips (Day-One Ready)

1. Optic: Choose a durable micro red dot (enclosed emitter recommended). Zero at 25–36 yards for intuitive holds inside 100.

2. White light: Mount at 1–3 o’clock with a reachable switch; confirm minimal shadowing from your muzzle device or can.

3. Mags & ammo: Function-test magazines with both practice and defensive loads; mark any outliers.

4. Re-zero after changes: Any muzzle device or suppressor swap requires a quick check for POI shift.

Who It’s For

• Home-defense owners seeking controllable recoil and modular accessory options in a compact format.

• PCC/AR trainers who want a premium 5.56 pistol for movement, transitions, and carbine mechanics.

• Enthusiasts drawn to the reliability benefits of HM’s Monobloc system and rugged receiver set.

Compliance & Safety

• Pistol configurations, braces/stocks, suppressors, and magazine capacities are regulated and may change. Verify all local/state/federal laws before configuring or transporting.

• Always follow the four rules of firearm safety; validate reliability with your chosen ammunition before any defensive role.

SEO Highlights (For Shoppers & Merchandisers)

• Primary Keywords: HM Defense RaiderMC556, HMP15FMB556C, 9.5" AR pistol 5.56, Monobloc barrel AR pistol, UPC 854164007425.

• Related Keywords: HM Defense Monobloc gas block, free-float M-LOK 5.56 pistol, forged 7075-T6 AR pistol, threaded 1/2x28 5.56 pistol.

• Value Propositions: Patented Monobloc reliability, compact 9.5" performance, free-float M-LOK rail, forged receivers, threaded muzzle.

What’s in the Box

• HM Defense RaiderMC556 AR pistol — 5.56 NATO, 9.5" Monobloc barrel

• (1) magazine (capacity varies by jurisdiction)

• Documentation (contents can vary by retailer) Hinterland Outfitters

Built around a smarter barrel system and a rock-solid front end, the RaiderMC556 gives you the compact handling and reliability edge you want—ready for your optic, light, and training plan.

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