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BCM AR-15 Handguards – MCMR M-LOK & KMR KeyMod Free-Float Rails | Mounts Plus

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BCM AR-15 Handguards – MCMR M-LOK & KMR KeyMod Free-Float Rails

Lightweight, Rugged, and Combat-Tested Rail Systems by Bravo Company USA

The BCM (Bravo Company Manufacturing) handguard is built for shooters who demand durability, precision, and modularity. Whether you're building a duty rifle, lightweight carbine, or precision AR setup, BCM handguards provide a rock-solid free-float platform trusted by military and professional shooters around the world.

At Mounts Plus, we stock the full line of BCM AR-15 handguards — including MCMR M-LOK, KMR Alpha KeyMod, and PKMR polymer rails — all made in the USA and built to BCM's exacting standards.


🔧 BCM Handguard Models We Carry

Model Mount Type Lengths Available Best Use Case
MCMR Rail M-LOK 7", 9", 10", 13", 15" Duty & Tactical Builds
KMR Alpha Rail KeyMod 10", 13", 15" Lightweight or legacy KeyMod setups
PKMR Rail Polymer KeyMod Mid-length, Carbine Budget builds or training rifles

Why Choose a BCM Free-Float Handguard?

  • Mil-Spec Hardcoat Anodized Aluminum – High strength, corrosion-resistant
  • Ultra-Lightweight Design – Save ounces without compromising durability
  • Free-Float Barrel Mounting – Improved accuracy and zero retention
  • M-LOK & KeyMod Compatibility – Mount lights, lasers, grips & accessories
  • Integrated QD Sling Mounts – Secure, ambidextrous sling attachment points
  • Tapered Barrel Nut & Locking System – Easy installation, no indexing required
  • BCM’s MCMR M-LOK rails are fully compatible with Magpul accessories and ideal for modern tactical builds.

🔩 Technical Specifications

  • Material: 6061-T6 Aluminum (MCMR/KMR), High-strength Polymer (PKMR)
  • Finish: Type III Class 2 Hardcoat Anodizing
  • Attachment: Steel barrel nut with mounting hardware included
  • Compatibility: Standard Mil-Spec AR-15 upper receivers
  • Gas System Support: Carbine, Mid-length, and Rifle-length
  • Inner Diameter: Fits low-profile gas blocks

🧠 KMR vs MCMR – Which One is Right for You?

Feature KMR Alpha (KeyMod) MCMR (M-LOK)
Mount System KeyMod (Legacy) M-LOK (Modern, Magpul standard)
Weight Slightly lighter Slightly stronger, more rigid
Accessory Support Limited vs M-LOK Widely supported by Magpul, SureFire, etc.
Best For Lightweight or retro builds Tactical or professional use

🔥 Top-Selling BCM Handguards In Stock

  • BCM MCMR 15" M-LOK Free-Float Rail
  • BCM KMR Alpha 13" KeyMod Handguard
  • BCM PKMR Mid-Length Polymer Handguard
  • BCM MCMR 10" Lightweight AR-15 Rail

Available in Black and Flat Dark Earth (FDE) finishes.


Customer Reviews

“BCM MCMR rail is the best upgrade I’ve done. Super rigid, lightweight, and rock solid.” – @RangeBuilt556

“KMR Alpha is still my go-to for a lightweight build. Easy install and no flex under pressure.” – @CQBJoe


FAQs – BCM Handguards

Q: Are BCM handguards free-floating?
Yes. All MCMR and KMR Alpha handguards are free-float designs, meaning they do not contact the barrel, improving accuracy.

Q: Will BCM rails fit my AR-15?
Yes, if your upper receiver is Mil-Spec. All rails include mounting hardware and a proprietary barrel nut.

Q: M-LOK or KeyMod – which should I choose?
M-LOK is the current industry standard with better accessory support. KeyMod is still functional for older setups or lightweight builds.

Q: Are BCM handguards compatible with suppressors?
Most models (13” and 15”) offer enough internal clearance and forward space for suppressor clearance and handguard overlap.

Q: What is the PKMR rail?
It’s a drop-in polymer handguard with KeyMod slots, designed for carbine- and mid-length gas systems with Delta Ring assemblies.


🎯 Build Your Rifle with BCM Precision

BCM handguards are built for shooters who train hard, run their guns aggressively, and demand military-grade reliability. Whether you’re upgrading an existing rifle or starting a fresh build, BCM rails give you the edge.