BCM Complete Gunfighter M4 Lower Receiver Assembly *Cosmetic Blem*


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(40 customer reviews)

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BCM Complete Gunfighter M4 Lower Receiver Assembly

BCM® Professional Grade Weaponry® are hard use tools, built to perform in combat where unfailing performance is the only standard for men and machine.

Exacting construction and rigorous durability are the standard for every weapon system that comes off our line. These are machined from 7075-T6 forgings to milspec dimensions and built meticulously with great attention to detail.


  • BCM PNT Trigger
  • H buffer and carbine buffer system
  • Six-position receiver extension
  • BCM Gunfighter Mod 0 trigger guard
  • BCM Mod 3 pistol grip
  • BCM Gunfighter Mod 0 stock
  • Black anodize finish
  • Properly staked

40 reviews for BCM Complete Gunfighter M4 Lower Receiver Assembly *Cosmetic Blem*

  1. Bryan (verified owner)

    Very nice purchase. Mated this BCM lower on a DDM4A1 upper and flawless right out of the box. Couldn’t even distinguish the blem to be honest. Maybe something in the finish or something I’m just not seeing regardless I’m happy with the purchase as well as from Rooftop. Super quick purchase and transfer to my local ffl. I thought I was going to have to wait a while but essentially two days later I was shooting it at the range. It’s a quality lower and even the mil spec trigger performed nicely. Was planning on changing it out for a Geissele but I may stick with it for a while. Overall recommend purchase.

  2. GPence (verified owner)

    Exceptional customer service and communication after the purchase. Shipped same day after an email confirmation! The lower arrived at my FFL and we could not locate a blem – paired with a new BCM upper it performed great when tested! Very pleased overall. I was referred to Rooftop by a friend, and would not hesitate to do business here in future. Thanks guys!!

  3. SA (verified owner)

    OUTSTANDING all around!!! Thanks, and will be coming back!

  4. Kenneth Nevels (verified owner)

    Great product 100% satisfied

  5. taylor hudgens (verified owner)

    absolutely a pleasure doing business with this company ordered it monday morning was in my hands on wednesday. small little scuff on magwell was the only “blem” i could find.

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