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Geissele Automatics, Buffer Tube Complete Assembly, Fits AR-15, Anodized Finish, Black, 6-Position, H3 Buffer, Super 42 Spring - SKU: 08-163B-H3 - UPC: 817953026991
Product Description
The Geissele Automatics Premium Mil-Spec Buffer Tube Complete Assembly in Black (08-163B-H3) is a duty-tier recoil dampening system specifically tuned for severely over-gassed carbines, short-barreled rifles (SBRs), and full-time suppressed AR-15 configurations. Precision-machined from high-strength 7075-T6 aluminum with a Type 3 Hardcoat Anodized black finish, this 6-position receiver extension comes paired with Geissele's Super 42 Braided Wire Spring and an extra-heavy H3 tungsten buffer (~5.4 oz).
The core of this heavy-duty assembly relies on Geissele's proprietary Super 42 spring architecture. Drawing structural inspiration from the German MG42 machine gun, the triple-wire braided layout absorbs harsh shock loads, completely eliminates internal spring harmonics and operational "ping," and provides 15% stronger average return force over standard round-wire springs. Paired with the maximum-mass H3 buffer, this combination drastically delays bolt unlock, slows excessive carrier stroke velocity, prevents bolt bounce, and tames violent gas blowback during suppressed firing schedules.
Equipped with extended, precision-rolled threads, a heavy-duty mil-spec castle nut, and receiver endplate, the Geissele 08-163B-H3 buffer tube assembly eliminates carrier tilt and premature tube wear, making it an essential drop-in upgrade for hard-use tactical, duty, and suppressed rifle staging.
*Armorer Bench Notes & Real-World Staging Guidance:
Fitment Matrix: Direct fit for standard AR-15 lower receivers. The heavy H3 buffer (~5.4 oz) paired with the Super 42 spring is specifically optimized for suppressed platforms, short-barrel carbines (10.3"–12.5"), and over-gassed host weapons.
- Verify host AR-15 lower receiver is completely clear, magazine removed, safety engaged, and chamber confirmed empty.
- Thread the castle nut (smooth side forward, notch orientation facing rearward) and endplate onto the 7075-T6 buffer tube threads.
- Insert the rear takedown pin detent spring into the receiver retention port, ensuring the endplate compresses the spring flat without binding.
- Thread the buffer tube into the lower receiver until it retains the buffer retainer pin and spring, then torque the castle nut to 38–40 ft-lbs using an armorers castle nut wrench.
- Stoppage/Staking Step: Stake the endplate into two castle nut notches using a automatic center punch to prevent backing off under harsh recoil. Insert Super 42 spring and H3 buffer until retained by the detent.
Key Features
- Super 42 Braided Wire Spring: Triple-strand braided wire design dampens vibrational harmonics, eliminates spring noise, and ensures consistent return force.
- H3 Heavy Tungsten Buffer (~5.4 oz): Maximum tungsten weighting slows violent bolt carrier speed and eliminates bolt bounce on suppressed and short-barreled rifles.
- 7075-T6 Aluminum Extension Tube: Machined from ultra-durable 7075-T6 aluminum with 6 precision stock positioning detents.
- Type 3 Hardcoat Anodized Finish: Matte black surface coating offers maximum resistance to environmental corrosion, carbon, and abrasions.
- Complete Heavy Recoil Kit: Includes 6-position buffer tube, Super 42 spring, H3 buffer, mil-spec castle nut, and endplate.
- Made in the USA: Built to Geissele Automatics' strict military-grade tolerances and quality standards.
Product Specifications
- Brand: Geissele Automatics
- Model: Premium Buffer Tube Complete Assembly w/ Super 42 & H3 Buffer
- MPN: 08-163B-H3 / 08163BH3
- SKU: 08-163B-H3
- UPC: 817953026991
- Platform Compatibility: AR-15 (Mil-Spec Lower Receivers)
- Positions: 6-Position Mil-Spec Diameter
- Buffer Weight: H3 (~5.4 oz)
- Material: 7075-T6 Aluminum / Stainless Steel Spring / Tungsten Weights
- Finish/Color: Type 3 Hardcoat Anodized Black
- Country of Origin: USA
