Receiver PartsAero PrecisionSold by Brownells

Aero Precision

Ar-15 Recoil Buffer Springs - Rifle Buffer Spring For Ar-15 Ss

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

Mil-spec Carbine

A collapsible buttstock

Mil-spec Rifle

A fixed buttstock

Suitable New

Build or as a direct

Rifle Models

A collapsible stock

Made Usa

$4.99
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SKU: 100054353

Overview

This buffer spring is intended for AR-15 builds and maintenance where a Mil-Spec replacement is needed for either a carbine with a collapsible buttstock or an A2/A4 rifle with a fixed buttstock, depending on the model selected. It suits hunters and shooters assembling a new rifle or replacing a worn part without changing the platform’s intended setup. The rifle-model spring is not for use on carbine models with a collapsible stock, so matching the spring to the correct configuration is important. Made by Aero Precision and made in the USA, it offers a straightforward parts-bin solution for keeping a compatible AR-15 running as configured.

Why Hunters Choose the Aero Precision

Mil-spec Buffer

Spring options for AR-15 carbines

Rifle Buffer

Spring version fits A2 and

Suitable New

Builds or replacing worn buffer

Clear Model-specific

Fitment helps avoid using the

Made Usa

By Aero Precision

Key Features

  • Mil-spec carbine buffer spring for AR15 carbines with a collapsible buttstock.
  • Mil-spec rifle buffer spring for A2 and A4 AR15 rifles with a fixed buttstock.
  • Suitable for a new build or as a direct replacement for worn parts.
  • Rifle models are not for use on carbine models with a collapsible stock.
  • Made in the USA.
  • Manufactured by Aero Precision.

Best Used For

  • AR-15 carbine builders using a collapsible buttstock and mil-spec buffer spring setup
  • A2 or A4 rifle owners needing a fixed-stock buffer spring replacement
  • Shooters completing a new AR build with a direct replacement spring
  • Users replacing worn buffer springs in compatible AR-15 configurations
  • Owners who need to match the correct spring type to stock style

Specifications

Carbine Buffer SpringYes
Collapsible Buttstock CompatibleYes
Compatible With A2 And A4 Ar15 RiflesYes
Compatible With Ar15 CarbinesYes
Direct ReplacementYes
Fixed Buttstock CompatibleYes
Made In The UsaYes
Mil SpecYes
New Build UseYes
Not For Use On Carbine Models With Collapsible StockYes
Rifle Buffer SpringYes

Pros

  • Mil-spec buffer spring options for AR-15 carbines with collapsible buttstocks.
  • Rifle buffer spring version fits A2 and A4 AR-15 rifles with fixed buttstocks.
  • Suitable for new builds or replacing worn buffer spring parts.
  • Clear model-specific fitment helps avoid using the wrong spring type.
  • Made in the USA by Aero Precision.

Considerations & Trade-offs

  • The rifle buffer spring version is intended for A2 and A4 AR15 rifles with a fixed buttstock, so it is not a fit for carbine setups with a collapsible stock.
  • This is a Mil-Spec replacement or build component, so it is best suited to compatibility-focused use rather than feature-driven upgrades.
  • The product listing covers both carbine and rifle spring types, so buyers need to confirm they are selecting the correct version for their specific AR15 configuration.
  • At this price point, it is a straightforward parts replacement rather than a bundled kit with additional components.

Suggested Comparisons

  • AR-15 buffer springs
  • AR-15 buffer kits
  • AR-15 lower receiver parts
  • AR-15 stock and buffer system components

Suggested Accessories

  • Buffer tube assembly
  • Carbine stock
  • Fixed stock
  • Lower receiver parts kit

Frequently Asked Questions

Which AR-15 setups is this buffer spring intended for?

The source data lists two Mil-Spec options: a carbine buffer spring for AR-15 carbines with a collapsible buttstock, and a rifle buffer spring for A2 and A4 AR-15 rifles with a fixed buttstock.

Can the rifle buffer spring be used in a carbine with a collapsible stock?

No. The product notes that the rifle model is not for use on carbine models with a collapsible stock.

Is this meant for a new build or replacement use?

Yes. The description says it is suitable for a new build or as a direct replacement for worn out parts.

Who makes this buffer spring?

The manufacturer listed in the source data is Aero Precision.

Is the country of origin provided?

Yes. The short description states that it is made in the USA.