Receiver PartsAero PrecisionSold by Brownells

Aero Precision

Ar-15 Carbine Buffer Kits - Mil-Spec Carbine Buffer Kit W/ H3 Buffer For Ar-15 Black

Our editorial team reviews specifications, product data, and field-use information to keep pages accurate.

Complete Ar-15

Carbine buffer kit for a

Includes Mil-spec

Buffer tube machined from 7075-T6

Buffer Tube

Features slots for a six-position

Kit Includes

Buffer spring, end plate, and

Configured H3

An H3 buffer for this

$85.99
View on Brownells

You'll be taken to Brownells to complete your purchase.

Hunter's Outpost earns a commission from affiliate links at no extra cost to you.

SKU: 100036681

Overview

Built for AR-15 carbine setups, this buffer kit is intended to support a more controlled feel in short-gas-system firearms where overgassing can be a concern. It includes the core components needed for a complete carbine buffer assembly, along with an H3 buffer for users looking to tune their rifle’s cycling setup. The mil-spec buffer tube is machined from 7075-T6 aluminum and is designed for a six-position buttstock. For builders and owners focused on a straightforward upgrade or replacement, it offers a practical parts set without unnecessary extras.

Why Hunters Choose the Aero Precision

Complete Ar-15

Carbine buffer kit includes the

Includes H3

Buffer for use in the

Mil-spec Buffer

Tube features six-position buttstock slots

Buffer Tube

Is machined from 7075-T6 aluminum

Kit Includes

Buffer spring, end plate, and

Key Features

  • Complete AR-15 carbine buffer kit for a ready-to-assemble setup.
  • Includes a mil-spec buffer tube machined from 7075-T6 aluminum.
  • Buffer tube features slots for a six-position buttstock.
  • Kit includes a buffer spring, end plate, and castle-lock nut.
  • Configured with an H3 buffer for this kit variant.
  • Offered by Aero Precision in black finish.

Best Used For

  • AR-15 carbine owners setting up a six-position buttstock on a mil-spec buffer tube
  • Shooters dealing with overgassing in short, pistol-length AR-style firearms
  • Builders wanting a complete buffer kit with spring, end plate, and castle-lock nut
  • Users selecting an H3 buffer option for a carbine-length AR-15 setup

Specifications

Buffer Tube Material7075-T6 aluminum
Buffer Tube TypeMil-spec
Buffer TypeH3 buffer
Buttstock PositionsSix-position
ColorBlack
Includes Buffer SpringYes
Includes Castle Lock NutYes
Includes End PlateYes

Pros

  • Complete AR-15 carbine buffer kit includes the core installation components.
  • Includes an H3 buffer for use in the listed kit configuration.
  • Mil-spec buffer tube features six-position buttstock slots.
  • Buffer tube is machined from 7075-T6 aluminum.
  • Kit includes buffer spring, end plate, and castle-lock nut.

Considerations & Trade-offs

  • This kit is built around a carbine-length buffer setup, so it is intended for AR-15 carbines rather than every AR-style configuration.
  • The included H3 buffer is one of several options in the lineup, so the buffer weight may not suit every build without checking your gas system and setup.
  • The description does not include a buttstock, so that component must be selected separately.
  • The kit is focused on the buffer system components; it is not a complete rifle assembly solution.

Suggested Comparisons

  • AR-15 buffer kits
  • AR-15 recoil management components
  • AR-15 carbine stock parts
  • AR-15 lower receiver accessory kits

Suggested Accessories

  • AR-15 buttstock
  • Buffer spring
  • Castle nut wrench
  • End plate

Frequently Asked Questions

What is included in this AR-15 carbine buffer kit?

The kit includes a mil-spec buffer tube, a buffer spring, an end plate, and a castle-lock nut. This version is listed with an H3 buffer in the product title.

Is this buffer kit intended for a specific AR platform setup?

The product is described as a complete buffer kit for an AR-15 carbine, and the long description notes it is aimed at AR-style firearms with short gas systems.

What stock positions does the buffer tube support?

The buffer tube features slots for a six-position buttstock.

What material is the buffer tube made from?

The long description states the buffer tube is machined from 7075-T6 aluminum.

Does the product description specify the exact differences between the available kit options?

No. The description says several options are available in the Carbine Buffer Kit lineup, but the provided text does not list all differences beyond this H3 buffer version.