Geissele Automatics Premium Mil-Spec Buffer Tube Assembly With Super 42 H3 - Black

Geissele Automatics Premium Mil-Spec Buffer Tube Assembly With Super 42 H3 - Black - Buffer Tube Assembly for AR-15 - view 1
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Overview

The Geissele Automatics Premium Mil-Spec Buffer Tube Assembly with Super 42 H3 is designed as a comprehensive parts kit that includes everything you need for a reliable buffer tube assembly. Featuring a Mil-Spec buffer tube, this assembly ensures compatibility with a wide range of components and provides a solid foundation for your build. This product is commonly found in Mid-Length gas system builds chambered in 5.56 NATO, making it an excellent choice for those looking to enhance performance and reliability.

Specifications

MPN08-163B-H3
Buffer Tube SpecMil-Spec
AssemblyParts Kit
ColorBlack

Available Merchants(6)

Prices checked

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BattleHawk Armory logo
BattleHawk Armory
Shipping varies
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In Stock
$151.00
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Ammunition Depot
~$28.90 est. shipping
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In Stock
$160.49
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Brownells
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In Stock
$189.00
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Primary Arms
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$189.00
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Palmetto State Armory
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$189.99
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Optics Planet
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$189.00

November 2026 so far on GunPartPicker

Geissele Automatics Premium Mil-Spec Buffer Tube Assembly With Super 42 H3 - Black is the sixth most added buffer tube assembly on GunPartPicker so far in November 2026, behind the Leapers UTG PRO Mil-Spec 6 Position Receiver Extension Tube KIT - Black, with about 4% of all buffer tube kits added to builds. Up from #7 in October. Builds with this buffer tube assembly are mostly chambered in 5.56 NATO (69%, then .223 Wylde 13%), split between mid-length (49%) and carbine-length (35%) gas systems, and mostly AR-15 (92%).

It was in stock most times we checked in October 2026, and today 5 of the 6 retailers we track have it in stock. It dipped to $151 at BattleHawk Armory for a stretch in October 2026, well under its usual $189, so sales do come around. Buying today, the lowest price is $151 at BattleHawk Armory, which matches the best price we saw in October.

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Read the guide: AR-15 Buffer Tube Assembly Guide →

Frequently Built With

The part most often added in each category by hundreds of builds that include this one

Build Configuration Breakdown

Aggregated and anonymized data showing how builders use this product

Platform

92.2%
AR-1592.2%
AR-105.9%
AR-92%

Caliber

69%
5.56 NATO69%
.223 Wylde13.1%
300 Blackout7.1%
.308 Win3.6%
9mm3.6%
Other3.6%

Gas System

49.1%
Mid-Length49.1%
Carbine35.1%
Pistol8.8%
Blowback3.5%
Rifle3.5%

Builds Featuring This Part

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Builds in the community that include the Geissele Automatics Premium Mil-Spec Buffer Tube Assembly With Super 42 H3 - Black

BuildPartsTotal
SBR 17.7" build
SBR 17.7"
22$1309.64

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