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Rifle Parts Bolt Parts Bolt Carrier Groups GEISSELE AUTOMATICS RELIABILITY ENHANCEMENT KIT H3 Support

Upgrade your AR-15 with the Geissele REK H3 for enhanced reliability, featuring a Stressproof Bolt, REBCG, and Nanoweapon coating for superior durability.

GEISSELE AUTOMATICS RELIABILITY ENHANCEMENT KIT H3

817953022696 100039953

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Variations
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Variations:

Upgrade your AR-15 with the Geissele REK H3 for enhanced reliability, featuring a Stressproof Bolt, REBCG, and Nanoweapon coating for superior durability.
RELIABILITY ENHANCEMENT KIT H3
523.14 GBP 0 £523.14 *
Not available
Cartridge: 5.56 mm NATO Finish: Black Make: AR-15 Product no.: 100039953
Not available
523.14 GBP 0 £523.14 *
Enhance your AR-15's reliability with the Geissele REK, featuring a stressproof bolt, REBCG, and Nanoweapon coating for superior durability and performance.
RELIABILITY ENHANCEMENT KIT H1
496.15 GBP 0 £496.15 *
Not available
Cartridge: 5.56 mm NATO Finish: Black Make: AR-15 Product no.: 100039951
Not available
496.15 GBP 0 £496.15 *
Enhance your AR-15's reliability with Geissele's REK, featuring a Stressproof Bolt, REBCG, and Nanoweapon coating for superior durability and performance.
RELIABILITY ENHANCEMENT KIT H2
507.31 GBP 0 £507.31 *
Not available
Cartridge: 5.56 mm NATO Finish: Black Make: AR-15 Product no.: 100039952
Not available
507.31 GBP 0 £507.31 *
496.15 523.14 3 GBP
523.14 GBP £523.14

Prices inclusive of duty & VAT.

Product no.: 100039953

Mfr. No.: 05-492-H3

817953022696 AR-15 RELIABILITY ENHANCEMENT KITS The Geissele Reliability Enhancement Kit (REK) includes the Geissele Reliability Enhanced Bolt Carrier Group (REBCG) and the Geissele Super 42 Braided Wire Buffer Spring & Buffer, available in H2 or H3 configuration for 5.56mm AR-15 pattern rifles. The REK represents the culmination of years of extensive testing and fine-tuning to deliver the most reliable operating system upgrade for your carbine. Manufactured in Geissele’s state-of-the-art facility in North Wales, PA, the REBCG is a full-mass, full-auto rated M16/M4 bolt carrier group. The carrier is machined from mil-spec 8620 steel and features a properly torqued and staked, chrome-lined gas key. The cam pin, machined from H13 medical steel, is coated with Nanoweapon (Chrome-Nitride) for maximum corrosion and wear resistance. The extended upper rails on the carrier provide greater stability and dramatically increase feeding reliability. The carrier is also coated with Nanoweapon for added durability. The Geissele Stressproof Bolt, made from Carpenter 158+, is cleaner and stronger than the typical material spec’d by the US Government. Geissele engineers collaborated with Carpenter Steel metallurgists in Reading, PA, to produce this special heat of material. The forged bolt manipulates the metal's grain structure, yielding a bolt capable of five times the life of a mil-spec bolt. Each bolt undergoes rigorous inspection, high pressure testing, magnetic particle inspection, and is coated with Nanoweapon. Nanoweapon, a family of coatings similar to DSL (Durable Solid Lubricant) developed by Picatinny Arsenal (US ARMY ARDEC), is exclusively available from Geissele Automatics. Geissele engineers worked for over three years with the research and development company that collaborated with Picatinny to fine-tune the coating. Nanoweapon provides unparalleled corrosion, wear, and abrasion resistance. Applied at low temperatures, the coating does not affect the part's metallurgy and has a surface hardness equivalent to 82HRC. This hardness allows it to easily reject carbon and facilitate cleaning, enabling normal firearm operation with less lubrication.
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496.15 523.14 3 GBP
Description Specification Customers reviews Accessories

GEISSELE AUTOMATICS RELIABILITY ENHANCEMENT KIT H3

523.14 GBP £523.14

Prices inclusive of duty & VAT.

Is a 'Call to order' product.
Requires order by phone

Description:

Enhance your AR-15's reliability with Geissele's proven technology

The Geissele Reliability Enhancement Kit (REK) is designed to provide the ultimate upgrade for your AR-15 pattern rifles, ensuring maximum reliability and performance. This kit includes:

  • Geissele Reliability Enhanced Bolt Carrier Group (REBCG)
  • Geissele Super 42 Braided Wire Buffer Spring & Buffer (available in H2 or H3 configuration)

Manufactured in Geissele’s state-of-the-art facility in North Wales, PA, the REBCG is a full-mass, full-auto rated M16/M4 bolt carrier group. Key features include:

  • Machined from mil-spec 8620 steel
  • Properly torqued and staked, chrome-lined gas key
  • Cam pin made from H13 medical steel, coated with Nanoweapon for enhanced corrosion and wear resistance
  • Extended upper rails for improved stability and feeding reliability

The Geissele Stressproof Bolt, crafted from Carpenter 158+, is superior in strength and cleanliness compared to typical materials used by the US Government. Collaborating with Carpenter Steel metallurgists in Reading, PA, Geissele has developed a bolt that:

  • Manipulates the metal's grain structure for increased longevity
  • Has a lifespan five times that of a mil-spec bolt

Each bolt undergoes rigorous inspection, high pressure testing, and magnetic particle inspection, ensuring top-tier quality. Coated with Nanoweapon, this advanced coating offers:

  • Unparalleled corrosion, wear, and abrasion resistance
  • Surface hardness equivalent to 82HRC
  • Easy rejection of carbon and simplified cleaning

With the Geissele Reliability Enhancement Kit, you can trust in a reliable operating system upgrade that enhances your firearm's performance while requiring less lubrication for normal operation.



Restrictions

  • Is a 'Call to order' product.

Top takeaways

  1. The Geissele Reliability Enhancement Kit for 5.56mm AR-15 rifles includes a Bolt Carrier Group and Super 42 Buffer Spring & Buffer, available in H3 configuration.
  2. The kit features high-grade materials like mil-spec 8620 steel and Carpenter 158+ for increased strength and reliability, with components coated in Nanoweapon for superior corrosion and wear resistance.
  3. The Nanoweapon coating, exclusive to Geissele, offers exceptional hardness and ease of cleaning, allowing the firearm to function with less lubrication.

Attributes

  • Cartridge: 
    5.56 mm NATO
  • Finish: 
    Black
  • Weapon type: 
    AR-15
  • Delivery weight: 0.726kg
  • Shipping height: 76mm
  • Shipping width: 76mm
  • Shipping length: 381mm
  • UPC: 817953022696

Item details

Made in USA
US export classification: I(g)

Customers reviews

Customer ratings (0)

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Variations:

Upgrade your AR-15 with the Geissele REK H3 for enhanced reliability, featuring a Stressproof Bolt, REBCG, and Nanoweapon coating for superior durability.
RELIABILITY ENHANCEMENT KIT H3
523.14 GBP 0 £523.14 *
Not available
Cartridge: 5.56 mm NATO Finish: Black Make: AR-15 Product no.: 100039953
Not available
523.14 GBP 0 £523.14 *
Enhance your AR-15's reliability with the Geissele REK, featuring a stressproof bolt, REBCG, and Nanoweapon coating for superior durability and performance.
RELIABILITY ENHANCEMENT KIT H1
496.15 GBP 0 £496.15 *
Not available
Cartridge: 5.56 mm NATO Finish: Black Make: AR-15 Product no.: 100039951
Not available
496.15 GBP 0 £496.15 *
Enhance your AR-15's reliability with Geissele's REK, featuring a Stressproof Bolt, REBCG, and Nanoweapon coating for superior durability and performance.
RELIABILITY ENHANCEMENT KIT H2
507.31 GBP 0 £507.31 *
Not available
Cartridge: 5.56 mm NATO Finish: Black Make: AR-15 Product no.: 100039952
Not available
507.31 GBP 0 £507.31 *

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