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Stern Defense AR-15 Parts & Accessories

Stern Defense LLC makes dedicated 9mm and other pistol caliber bolts for AR-15 style carbines. PCC builders know them for drop in 9mm bolts that work with Glock and Colt pattern mags.

Manufacturing origin: Made in USA.

Market positioning: Duty / Professional.

Stern Defense has 67 products available on GunPartPicker, ranging from $16.59 to $593.11.

Stern Defense Product Categories

  • Upper Receiver: 20 products
  • Barrel: 11 products
  • Handguard: 8 products
  • Bolt Carrier Group: 8 products
  • Muzzle Device: 7 products
  • Glock Magazine: 4 products
  • Trigger: 3 products
  • Magazine: 3 products
  • Bolt Catch: 1 product
  • Glock Barrel: 1 product
  • Charging Handle: 1 product

Stock status: 39 in stock, 28 out of stock.

Stern Defense logo

Stern Defense

Website
67
Products
8
Retailers
Best overall: Optics Planet
$17 – $593
Price Range
Best value: Optics Planet
62%
In Stock
77 of 125 listings

Stern Defense on GunPartPicker

Builders have been adding Stern Defense parts to their builds on GunPartPicker since April 2026. The most added: Stern Defense Nickel Boron 9mm Complete Bolt Carrier Group - SD BU9 NIB ECHO, Stern Defense SD 6in MOD5 MLOK .45ACP Upper Receiver Assembly 8in M-LOK Handguard .578-28 TPI 1-16 Twist Rate Black 015SD8INMD5ML6INBR45ACPKK and Stern Defense Melonite .40S&W Complete Bolt Carrier Group - SD BU40. About 58% of the 67 Stern Defense products we track are in stock today.

Updated · from real builds on GunPartPicker · Prices checked · refreshed daily across 37 retailers

Stern Defense products

About Stern Defense

Stern Defense makes dedicated 9mm and other pistol caliber bolts for AR-15 carbines. The 9mm bolt drops in and runs Glock or Colt pattern mags.

Made in USA · PCC bolts · Glock mag compatible · 8620 steel

Why Stern Defense

Stern Defense makes pistol caliber bolts for AR-15 carbines. The 9mm bolt is the main part, built to run Glock or Colt pattern mags.

It's machined from 8620 steel with a Melonite finish. It's made for single stage triggers with short resets and works with the JP silent captured spring and the Law Tactical folder.

Uppers run about $500 against roughly $400 for the typical one, and bolt carriers come in under, about $155 against $200.

A pistol caliber AR needs the lower and mags to match. We'd buy a Stern bolt for a 9mm AR that takes Glock mags.

  • The 9mm AR bolt is machined from 8620 steel with a Melonite finish and works with Glock and Colt pattern magazines.
  • It's made for single stage triggers with short resets and works with the JP silent captured spring and the Law Tactical folder.

Brand Overview

Products67
PositioningDuty / Professional
ManufacturingMade in USA
Price Range$17 – $593
In Stock39 of 67 (58%)

Available At

Classic FirearmsBrownellsBattleHawk ArmoryPalmetto State ArmoryAmmunition DepotOptics Planet

What Builders Choose

Based on real builds

Top Stern Defense products builders are adding

Stern Defense Nickel Boron 9mm Complete Bolt Carrier Group - SD BU9 NiB ECHO
Bolt Carrier Group·Frequently added

Stern Defense Nickel Boron 9mm Complete Bolt Carrier Group - SD BU9 NiB ECHO

$169.99
Stern Defense SD 4in Mod4 M-Lok 4in Barrel 9mm Black Complete Upper Receiver Black SDINBRLKK
Upper Receiver·Added to builds

Stern Defense SD 4in Mod4 M-Lok 4in Barrel 9mm Black Complete Upper Receiver Black SDINBRLKK

$419.27
Stern Defense Hg15 Mod4 M-Lok Ar-15 Handguard - 15"
Handguard·Added to builds

Stern Defense Hg15 Mod4 M-Lok Ar-15 Handguard - 15"

$109.99
Stern Defense Hybrid 2 Stage Nickel Boron Drop In Trigger- H2S NIB
Trigger·Added to builds

Stern Defense Hybrid 2 Stage Nickel Boron Drop In Trigger- H2S NIB

$167.99
Stern Defense AR-15 Charging Handle Black 007-SD CH1-D1-M
Charging Handle·Added to builds

Stern Defense AR-15 Charging Handle Black 007-SD CH1-D1-M

See price
Stern Defense .45 ACP Flash Can, Black- SD RBC45
Muzzle Device·Added to builds

Stern Defense .45 ACP Flash Can, Black- SD RBC45

See price

Customer Ratings & Reviews

No reviews yet for this brand.