The Geissele Reliability Enhancement Kit in the H2 configuration upgrades the operating system of a 5.56mm AR-15 pattern rifle with a bolt carrier group, buffer spring and buffer sold as a matched set (Geissele part no. 05-492-H2). The kit includes the Geissele Reliability Enhanced Bolt Carrier Group, a Super 42 braided wire buffer spring and an H2 buffer. Geissele Automatics made the Reliability Enhancement Kit to be the most dependable operating system upgrade for a carbine, built in its factory in North Wales, Pennsylvania. This is the H2 version of the kit, so it ships with the H2 buffer.

Key Specifications

• The kit includes three components: the Reliability Enhanced bolt carrier group, a Super 42 braided wire buffer spring and an H2 buffer.
• It is built for 5.56mm AR-15 pattern rifles, the platform the bolt carrier group is made to run in.
• The carrier is mil-spec 8620 steel with a torqued and staked, chrome-lined gas key, so the key stays tight under hard use.
• The bolt is Carpenter 158+ steel, forged for a bolt that Geissele says lasts up to five times as long as a mil-spec bolt.
• The cam pin is H13 steel, coated with Nanoweapon for corrosion and wear resistance.
• The carrier and bolt are coated in Nanoweapon, a chrome-nitride coating with a surface hardness equivalent to 82 HRC that makes cleaning easier.
• The bolt carrier group is full-auto rated and full mass, with extended upper rails on the carrier that add stability and feeding reliability.

Frequently Asked Questions

What is in the Reliability Enhancement Kit? The kit includes the Geissele Reliability Enhanced bolt carrier group, a Super 42 braided wire buffer spring and the buffer in your choice of configuration. This listing is the H2 version.

What rifles does the kit fit? Geissele makes the kit for 5.56mm AR-15 pattern rifles.

What is the Nanoweapon coating? Nanoweapon is a family of Durable Solid Lubricant style coatings developed with Picatinny Arsenal, and Geissele says it is available only from Geissele Automatics. It resists corrosion and wear and lets the rifle run with less lubrication.

Buy the Geissele Reliability Enhancement Kit, H2 Buffer

If you want an AR that runs without drama, the bolt carrier group, spring and buffer need to work as a system, and this kit hands you all three. Order it from our Lubbock, Texas gun shop for fast, insured shipping, and see more AR bolt carrier groups for your build.