Rifle Parts

Shield Arms Rifle Parts

Barrels We Make. Glass We Trust.

Shield Precision barrels, PMAG extensions and Vapor Concepts parts made in Montana, plus the optics, lights, mounts and magazines we stock to finish the rifle.

Shield Precision 22 ARC · 6mm ARC PMAG Gen 3 +5 Billet extension Vapor Concepts AR-15 parts

Made in Montana. Our mag extensions carry a lifetime warranty.

Shop Rifle Parts · Made Here or Stocked CategoryWhat's InsideSource BarrelsShield Precision 22 ARC · 6mm ARC Made Here Mag ExtensionsPMAG Gen 3 +5 · pre-installed Made Here Vapor ConceptsOur in-house brand AR-15 magwell · parts Made Here OpticsEOTech Holo · LPVO · magnifier Stocked LightsSureFire · Modlite Lights · switches Stocked MountsArisaka · more Scope · light mounts Stocked MagazinesMagpul · Duramag 5.56 / .223 / 300 BLK Stocked

Made in Montana   416R Stainless Barrels   Billet PMAG Extensions   Lifetime Warranty on Extensions

Made in Montana

The Rifle Parts We Make

 
01 · Barrels

Shield Precision Barrels

Our Marksman-profile AR-15 barrels, cut from 416R stainless and made in Montana. We also make contoured Palma rifle blanks.

  • Calibers 22 ARC · 6mm ARC
  • Lengths 18" · 20"
  • Gas Rifle-length +1
  • Threads 1/2x28 (22 ARC) · 5/8x24 (6mm ARC)
Shop Barrels
02 · Mag Extensions

PMAG Gen 3 +5 Extension

A billet aluminum extension that adds five rounds to a Magpul PMAG Gen 3. Buy it for mags you own, or get it pre-installed.

  • Fits Magpul PMAG Gen 3
  • Adds +5 rounds
  • Pre-installed PMAG Gen 3 · Gen 3 Window
  • Made in Bigfork, Montana
Shop Extensions
03 · Vapor Concepts

Vapor Concepts

Our in-house brand of AR-15 parts, made in Bigfork with Multi Jet Fusion. The line includes a flared AR-15 magwell with an integrated trigger guard.

  • Magwell fits Most MILSPEC forged lowers
  • Includes Integrated trigger guard
  • Process Multi Jet Fusion
  • Made in Bigfork, Montana
Shop Vapor Concepts

Made in Montana. Mounted on your rifle.

Shield Precision barrels, PMAG extensions and Vapor Concepts parts come out of Montana, not a catalog warehouse. Our extensions are backed by a lifetime warranty.

Building From the Lower Up?

Start With a Shield Arms Lower

The SA-15 folds at the receiver on our patented folding lower, with no adapter bolted on. The SA-4 is our fixed-stock billet lower. Both are machined in Bigfork, Montana. Lower receivers ship to your FFL.

SA-15 Folding Lowers Stripped or complete SA-4 Lowers Fixed-stock billet SA-15 Builders Kit Folding build How It Folds See the FLR
Finish the Rifle

Optics, Lights, Mounts and Mags

 
Rifle Optics

Holographic and LPVO

EOTech holographic sights, low-power variable optics and magnifiers.

Rifle Lights

Weapon Lights

SureFire and Modlite lights, light heads and switches.

Rifle Mounts

Scope and Light Mounts

Scope mounts, plus Arisaka light mounts and finger stops for M-LOK and Picatinny.

Rifle Magazines

AR-15 Magazines

Magpul PMAG and Duramag magazines for 5.56 NATO, .223 Remington and 300 BLK.

What Rifle Parts Does Shield Arms Make?

Shield Arms makes Shield Precision AR-15 barrels, a billet +5 extension for Magpul PMAG Gen 3 magazines, and Vapor Concepts AR-15 parts, all in Montana. Optics, lights, mounts and rifle magazines are from brands we stock.

  • Barrels: Shield Precision Marksman-profile AR-15 barrels in 22 ARC and 6mm ARC, 18" and 20", 416R stainless, rifle-length +1 gas. Plus contoured Palma rifle blanks.
  • Mag extensions: a +5 billet aluminum extension for Magpul PMAG Gen 3 magazines, sold alone or pre-installed. Machined in Bigfork, Montana, with a lifetime warranty.
  • Vapor Concepts: our in-house AR-15 parts brand, including a flared magwell with integrated trigger guard for MILSPEC forged lowers.
  • Stocked: EOTech optics, SureFire and Modlite lights, Arisaka and other mounts, and Magpul PMAG and Duramag magazines.
  • Capacity laws vary by state and city. Check yours before you buy.
Questions

Rifle Parts FAQ

 

Which rifle parts does Shield Arms make?

Shield Precision barrels, PMAG +5 extensions and Vapor Concepts parts. Optics, lights, mounts and magazines are from other brands we carry.

What calibers do Shield Precision barrels come in?

22 ARC and 6mm ARC, in 18" and 20" lengths. The 22 ARC is threaded 1/2x28 and the 6mm ARC is 5/8x24. See the barrels.

Which PMAGs does your extension fit?

Our +5 extension fits Magpul PMAG Gen 3 magazines. Buy it alone for mags you own, or pre-installed on a PMAG Gen 3, including the Gen 3 Window.

What is Vapor Concepts?

Our in-house brand of AR-15 parts, made in Bigfork, Montana, with Multi Jet Fusion additive manufacturing. See the line.

Will the Vapor Concepts magwell fit my lower?

It fits most MILSPEC forged AR-15 lowers without modification. It doesn't fit Aero Precision lowers with an integral magwell, and billet lowers aren't guaranteed. It isn't compatible with standard Gen 3 PMAGs.

Where can I find installation help?

Our installation guides cover our extensions step by step. Still stuck? Contact us.

Picture for category Rifle Mag Extensions

Rifle Mag Extensions

Picture for category Rifle Optics

Rifle Optics

Picture for category Rifle Lights

Rifle Lights

Picture for category Rifle Mounts

Rifle Mounts

Picture for category Vapor Concepts

Vapor Concepts

Picture for category Rifle Barrels

Rifle Barrels

Picture for category Rifle Magazines

Rifle Magazines

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ARISAKA Offset Scout Mount - M-LOK®

ARISAKA Offset Scout Mount - M-LOK®

A versatile mount engineered for a variety of weapon lights, such as Modlite, Surefire, and more - details below.
$47.95
PMAG® 30 AR/M4 GEN M3 w/Window (30 Rounds): 5.56x45 NATO (.223 Remington)

PMAG 30 AR/M4 GEN M2 MOE - 30 rds - 5.56x45mm / .223 Remington

Magpul PMAG 30 AR/M4 GEN M2 MOE 30-round polymer magazine for AR-15/M4. Proven reliability, anti-tilt follower, enhanced grip texture. Military tested.
$12.95
Shield Precision AR-15 Barrels - raw

Shield Precision AR-15 Barrels

Uncompromised accuracy, made in Montana
$279.95
Picture of Shield Precision Contoured Palma Rifle Blank

Shield Precision Contoured Palma Rifle Blank

Uncompromised accuracy, made in Montana
$309.95
SUREFIRE - DUAL FUEL SCOUT LIGHT® PRO

SUREFIRE DUAL FUEL SCOUT LIGHT® PRO

6-Volt Dual Fuel Scout Light® Pro w/ Z68 Tailcap
$331.95
Picture of Vapor Concepts AR-15 Magwell

Vapor Concepts AR-15 Magwell

A one-piece flared magwell and trigger guard for MILSPEC forged AR-15 lowers, made in Bigfork, Montana. Check your lower before ordering: returns aren’t accepted for fit issues.
$34.95
Zero Gravity Summit 30mm 1.54"

Zero Gravity Summit 30mm 1.54"

Summit scope mounts bring modern solutions to mounting and leveling rifle scopes, while also being tough enough to handle any environment thrown at them without compromising zero.
$334.95
Zero Gravity Summit 30mm 1.93"

Zero Gravity Summit 30mm 1.93"

Summit scope mounts bring modern solutions to mounting and leveling rifle scopes, while also being tough enough to handle any environment thrown at them without compromising zero.
$334.95
Zero Gravity Summit 34mm 1.93"

Zero Gravity Summit 34mm 1.93"

Summit scope mounts bring modern solutions to mounting and leveling rifle scopes, while also being tough enough to handle any environment thrown at them without compromising zero.
$334.95
ARISAKA Side Scout Mount - M-LOK®

ARISAKA Side Scout Mount - M-LOK®

A low profile side mount for weapon lighting - details below.
$39.95
Modlite OKW Light Head

Modlite OKW Light Head

Modlite Systems offers the newest take on weapon lighting - Customize every option down to your preference on visual range, usability, and battery life. Details below.
$208.95
PMAG® AR/M4 M3, 223 Remington (30 Rounds): 5.56x45 NATO (.223 Remington)

PMAG 30 AR/M4 GEN M3 - 30 rds - 5.56x45mm / .223 Remington

The next-generation PMAG 30 AR/M4 GEN M3 is a 30-round polymer magazine for AR15/M4 compatible weapons chambered in 5.56x45 NATO / .223 Remington.
$14.95
Picture of PMAG Gen3 Window +5 Pre-Installed Shield Magazine Extension

PMAG Gen3 Window +5 Pre-Installed Shield Magazine Extension

Pre-installed Magpul PMAG Gen3 Window with Shield Arms +5 extension for 35-round capacity and visual round verification. Features easy-access floor plate, aluminum construction, and lifetime warranty.
$51.95
Shield Arms SA-9 7.5" Complete Upper Receiver Group

Shield Arms SA-9 7.5" Complete Upper Receiver Group

9mm upper receiver, 7.5" black nitride barrel, 6" Shield Arms handguard, black nitride BCG, Radian Raptor charging handle, 9mm A2 muzzle device.
$699.95
ARISAKA Side Scout Mount - Picatinny

ARISAKA Side Scout Mount - Picatinny

A low profile side mount for weapon lighting - details below.
$47.95
DURAMAG SPEED 5.56/.223/300BLK

DURAMAG SPEED 5.56/.223/300

DURAMAG Speed™ magazines are a truly improved USGI magazine.
$13.95
EOTECH G45-STS

EOTECH G45-STS

FAST TRANSITIONING FROM 5X TO 1X
$679.95
PMAG® Gen3 +5 Magazine Extension - Black

PMAG Gen3 +5 Magazine Extension

Add 5 rounds to your GEN 3 Magpul PMAG with this billet 6061 aluminum extension. Features a unique easy-access floor plate for field servicing without removing the extension, machined index cuts for a positive grip, and works with your OEM spring. Type 2 anodized. Made in the USA. 100% Lifetime Warranty.
$39.95
Modlite ModButton Lite (Surefire®/Modlite Plug)

SUREFIRE Modlite ModButton Lite (Surefire®/Modlite Plug)

Modlite Systems offers the newest take on weapon lighting - Customize every option down to your preference on visual range, usability, and battery life. Details below.
$77.95
DURAMAG SS AR 5.56/.223/300BLK

DURAMAG SS AR 5.56/.223/300BLK

The 5.56/.223/.300BLK DURAMAG SS™ is designed for serious shooters who require the most out of their magazines so when performance and durability are paramount, make the switch to DURAMAG SS™ and never look back.
$15.95
Modlite ModButton

Modlite ModButton

Modlite Systems offers the newest take on weapon lighting - Customize every option down to your preference on visual range, usability, and battery life. Details below.
$123.95
Picture of PMAG Gen3 +5 Pre-Installed Magazine Extension

PMAG Gen3 +5 Pre-Installed Magazine Extension

Pre-installed Magpul PMAG Gen3 with Shield Arms +5 extension for 35-round total capacity. Features easy-access floor plate, billet aluminum construction, and lifetime warranty. Made in USA.
$54.95
Shield Arms AR15 Single Magazine Carrier

Shield Arms AR15 Single Magazine Carrier

Our Kydex mag carrier for the AR-15 magazines.
$41.95
Holosun 515CM Red Dot

Holosun 515CM Red Dot

The HS515CM is a 20mm micro optical sight designed for rifle and carbine applications.
$349.95
PMAG® 30 AR/M4 GEN M3 w/Window (30 Rounds): 5.56x45 NATO (.223 Remington)

PMAG 30 AR/M4 GEN M3 Window - 30 rds - 5.56x45mm / .223 Remington

The next-generation PMAG 30 AR/M4 GEN M3 Window is a 30-round 5.56x45 NATO (.223 Remington) polymer magazine for AR15/M4 compatible weapons.
$17.95
Shield Arms 9mm Bolt

Shield Arms 9mm Bolt Carrier Group

The 9mm BCG used in all our SA-9 builds, Glock® Compatible, Blowback
$154.95
Shield Arms AR15 Carrier/PMAG® Combo

Shield Arms AR15 Carrier / PMAG Combo

Pre-Installed Magpul PMAG Gen3 window magazine with preinstalled Shield Arms +5 mag extension and Shield Arms AR-15 magazine carrier.
$83.95
SUREFIRE Warcomp Flash Hider 7.62

SUREFIRE Warcomp Flash Hider 7.62

SUREFIRE Warcomp Flash Hider 7.62 - Premium quality product with superior construction and reliable performance.
$151.95
Radian Talon Ambidextrous Safety Selector

Radian Talon Ambidextrous Safety Selector

Radian Talon Ambidextrous Safety Selector - Premium quality product with superior construction and reliable performance.
$59.95
Radian QD End Plate

Radian QD End Plate

Radian QD ENDPLATE FOR AR15/M16
$39.95
NeoMag Sentry Strap

NeoMag Sentry Strap

Deploying is simple; grab your sling, and tug.
$39.95
Kevlar Sling Loop [x2]

Kevlar Sling Loop (2-Pack) - Quick Attach

The Shield Arms Kevlar Sling Loop 2-pack provides instant front and rear attachment to any rifle setup without mounting hardware, reducing noise and bulk while offering exceptional heat resistance up to 900°F.
$17.95
EOTECH VUDU® 1-8X24 SFP W/HC3 RETICLE

EOTECH VUDU® 1-8X24 SFP W/HC3 RETICLE

Dial up the magnification & dominate with speed.
$1,178.95
EOTECH HWS EXPS3™

EOTECH HWS EXPS3™

EOTECH HWS EXPS3™ - Premium quality product with superior construction and reliable performance.
$749.95
AR-15 Carbine Buffer Spring

AR-15 Carbine Buffer Spring

AR15 / M16 Carbine Buffer Spring
$4.95
ARISAKA Finger Stop - Picatinny

ARISAKA Finger Stop - Picatinny

A minimal, ergonomically designed control accessory to support hand placement on your rifle - details below.
$27.95
Radian Raptor-LT Charging Handle

Radian Raptor-LT Charging Handle

The Radian Raptor-LT delivers the full ambidextrous performance of the original Raptor at a lighter weight and lower price. 7075-T6 aluminum core, fiberglass-reinforced polymer over-mold, MilSpec Type III anodized finish. Drop-in for any AR-15/M16-pattern rifle. 1.2 oz. Made in USA. Limited lifetime warranty.
$79.95
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