The Geissele Super 42 Braided Wire Buffer Spring and Buffer Combo, H1 (brand part no. 05-495) pairs the Super 42 spring with a matched Geissele buffer. Geissele Automatics built the spring from three independent strands of wire, the same idea used in the German MG42 machine gun, so the strands flex separately and act as a harmonic damper and energy absorber. That design is meant to improve the function and reliability of an AR-15 pattern rifle. It is for carbine-length buffer tubes only, and the spring and buffer are designed to work together as a set.

Key Specifications

• The spring is braided from three independent wire strands, which flex separately to absorb energy.
• Average return force is 15% stronger than a standard buffer spring, which helps strip rounds from the magazine when the rifle is dirty or running steel-case ammunition.
• Compared with a stock spring, it has a decreased tendency to lose length and force over a given round count.
• It removes the spring reverberation (twang) felt and heard through the buttstock.
• This is the H1 combo, a Geissele buffer supplied with the spring as a matched set.
• It is for use with carbine-length buffer tubes, the standard on carbine AR-15 pattern rifles.
• It is not compatible with rifle-length or A5 buffer tubes and receiver extensions, so check your tube first.
• Geissele does not recommend it with .300 Blackout subsonic ammunition, since the spring may be too powerful for the rifle to function.
• The spring is designed for AR-15 pattern rifles, as Geissele states.

Frequently Asked Questions

Which buffer tubes does the Super 42 fit? Geissele says the Super 42 is for carbine-length buffer tubes and is not compatible with rifle-length or A5 buffer tubes and receiver extensions. A rifle-length Super 42 is sold separately.

Can I use the Super 42 spring with a standard buffer? No. Geissele states the Super 42 spring and Geissele buffer are designed to work together as a set, and the spring will not fit over a standard buffer. Installing it with a standard buffer will damage the rifle or receiver extension.

Is it a good choice for a subsonic .300 Blackout build? Geissele does not recommend the Super 42 with .300 Blackout subsonic ammunition because the spring may be too powerful and not allow the rifle to function properly.

Buy the Geissele Super 42 Braided Wire Buffer Spring and Buffer Combo, H1

A buffer spring is one of the cheapest places to tune an AR-15, and a braided spring with a matched buffer takes the guesswork out of the pairing. Order it from our Lubbock, Texas shop for fast shipping, and see more AR buffer system parts while you are here.