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Buy AR-10 Parts & 308 Upper Assemblies Online

Like it’s smaller AR 15 counterpart, the AR 308 platforms modular design allows for the same DIY customization options, but fires a larger round. The end result is a weapon that handles like the AR 15 platform you've come to love, but with greater velocity, longer effective range, and more kinetic energy sent downrange. The .308 caliber round has proven to be a great option for medium to long range shots in both the civilian world and in combat, and the AR 10’s magazine fed design allows for quicker followup shots and more ammunition capacity than bolt-action rifles. Combined with quality optics, the AR 10 makes a great long range platform suitable for target shooting or hunting.

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Aero Precision M5 (.308) Stripped Upper Receiver - Red Barn Armory Aero Precision - M5 (.308) Upper Receiver (Stripped)

Aero Precision M5 (.308) Stripped Upper Receiver

List Price: $135.00
Our Price: $129.99
Sale Price: $109.99
Savings: $25.01
In Stock
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Aero Precision M5 (.308) Stripped Lower Receiver - Red Barn Armory Aero Precision - M5 (.308) Stripped Lower Receiver - Black Anodized

Aero Precision M5 (.308) Stripped Lower Receiver

List Price: $185.00
Our Price: $179.99
Sale Price: $159.99
Savings: $25.01
In Stock
(4)
Aero Precision M5 (.308) Stripped Upper Receiver - Red Barn Armory Aero Precision - M5 (.308) Upper Receiver with Forward Assist - ASSEMBLED

Aero Precision M5 (.308) Upper Receiver complete with forward assist and dust cover installed.

List Price: $155.00
Our Price: $149.99
Sale Price: $139.99
Savings: $15.01
In Stock
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Magpul - PMAG 10rd LR/SR Gen M3 7.62x51(.308) Magazine- BLK

The PMAG 10 LR/SR GEN M3 brings the M3 improvements to the 10 round 7.62 NATO/.308 Winchester SR-25 magazine form factor. All of the GEN M3 improvements are here in the 10 round capacity of their previous design.

Our Price: $17.99
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Mega Arms MATEN 308 AMBI Receiver Set Nickel Boron Mega Arms - MATEN 308 AMBI Billet Receiver Set + Charging handle - Nickel Boron

Mega Arms MATEN AR308 billet receiver set offered in a distinctive and durale nickel boron finsh.

List Price: $662.00
Our Price: $627.99
Savings: $34.01
In Stock
Magpul - PMAG 20rd LR/SR Gen M3 7.62x51(.308) Magazine- BLK

20 round capacity AR308 magazine from Magpul.

Our Price: $18.95
In Stock
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Aero Precision M5 (.308) Stripped Upper & Lower Receiver Set - Red Barn Armory Aero Precision - M5 (.308) Upper & Lower Receiver Set (FDE)

Aero Precision M5 (.308) Stripped Upper & Lower Receiver Set (FDE)

List Price: $390.00
Our Price: $374.99
Sale Price: $329.99
Savings: $60.01
In Stock
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Magpul Gen M3 25rd 308 PMAG with Window Magpul - PMAG 25rd LR/SR Gen M3 7.62x51(.308) Magazine with WINDOW- BLK

25 round windowed PMAG for your AR10/ AR308 rifle.

Our Price: $22.95
In Stock
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Mega Arms MATEN 308 Billet Upper Lower Receiver Set Mega Arms - MATEN 308 Billet Upper & Lower Receiver Set

Superb machining and craftsmanship in Mega Arms MATEN 308 reciever set.

List Price: $577.00
Our Price: $549.99
Savings: $27.01
In Stock
Aero Precision M5 (.308) Builder Set 15" Keymod - Red Barn Armory Aero Precision - M5 (.308) Builder Set w/ 15" KeyMod Handguard BLK Anodized

Aero Precision M5 308 Builder Set 15 inch Keymod

List Price: $504.00
Our Price: $499.99
Sale Price: $469.99
Savings: $34.01
In Stock
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Aero Precision M5 308 Builder Set 15 inch MLOK - Red Barn Armory Aero Precision - M5 (.308) Builder Set w/ 15" M-LOK Handguard BLK Anodized

Aero Precision M5 308 Builder Set  with 15 inch M-LOK handguard.

List Price: $504.00
Our Price: $499.99
Sale Price: $469.99
Savings: $34.01
In Stock
(1)
Aero Precision M5 308 Builder Set 12 inch Keymod- Red Barn Armory Aero Precision - M5 (.308) Builder Set w/ 12" Keymod Handguard BLK Anodized

Aero Precision M5 308 Builder Set with 12 inch M-LOK handguard.

List Price: $477.00
Our Price: $469.99
Sale Price: $429.99
Savings: $47.01
In Stock
CMMG - .308 Gun Builder's Lower Parts Kit (.308 LPK without Grip & Trigger Assy)

308 lower parts kit, less the grip, trigger guard and fire control group.

List Price: $54.95
Our Price: $46.99
Savings: $7.96
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CMT UHP10 Billet Receiver Set CMT Tactical - UHP10 BILLET AR308 Receiver Set

CMT established a name for themselves with their AR15 billet lower and upper receivers, and now they have taken all the great features of the UHP-15 and carried it over to the .308 platform, with the introduction of the CMT UHP-10 Billet Receiver Set.

List Price: $525.00
Our Price: $499.99
Savings: $25.01
In Stock
(1)
Mega Arms MATEN 308 Billet Upper/Lower Receiver Set-Ambi Mega Arms - MATEN 308 AMBI Billet Upper / Lower / CH - Receiver Set

Superb machining and craftsmanship in Mega Arms MATEN 308 reciever set.

List Price: $608.00
Our Price: $599.99
Sale Price: $579.99
Savings: $28.01
In Stock
(2)
Aero Precision M5 308 Builder Set 12 inch MLOK - Red Barn Armory Aero Precision - M5 (.308) Builder Set w/ 12" M-LOK Handguard BLK Anodized

Aero Precision M5 308 Builder Set with 12 inch M-LOK handguard.

List Price: $477.00
Our Price: $469.99
Sale Price: $429.99
Savings: $47.01
In Stock
Yankee Hill Machine (YHM) - Flash Suppressor w/o Teeth 5/8"x24 AR10/.308

Popular upgrade over the standard A2 flash hider. Fits 5/8" thread barrel of .300 AAC, .308" or similar.

Our Price: $44.99
In Stock
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Mega Arms - MATEN Slide Lock SL-4000 Charging Handle AR308 Mega Arms - Slide Lock SL-4000 Ambi-Charging Handle - MATEN/AR308

New MATEN ambi-charging handle from Mega Arms, for the AR308 rifle.

Our Price: $64.99
In Stock
Phase 5 Tactical Extended Bolt Release V2-308 Phase 5 Tactical - Extended Bolt Release EBRV2-.308 (AR308 rifle)

The Extended Bolt Release v2/308 (EBRv2/308) was designed to be used on the LR 308 DPMS type and similar weapon systems. It has no backing plates or screws to obstruct its ability to fit just about any DPMS type 308 combination of lower and upper receivers.

Our Price: $53.99
In Stock
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BCM / Vltor - Gunfighter Charging Handle mod 4 latch (medium) 7.62 (AR10)

Great upgrade over the standard mil-spec charging handle.

List Price: $57.95
Our Price: $54.99
Savings: $2.96
In Stock
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DPMS - (AR10) 308 Lower Receiver Parts Kit

Complete AR308 lower parts kit.

Our Price: $87.95
Sale Price: $69.99
Savings: $17.96
In Stock
(7)
Yankee Hill Machine (YHM) - Flash Hider Phantom 5C2 with Teeth 5/8"-24 AR10/.308

Aggressive and affordable flash hider for 5/8" thread .30 caliber barrels such as .308" and .300 AAC.

Our Price: $44.99
In Stock
(1)
Mega Arms MATEN Extended Rifle Keymod Set Mega Arms - MATEN (308) Extended Rifle Length Keymod Set

Billet 308 Receiver Set from Mega Arms, with extended Keymod handguard.

List Price: $892.00
Our Price: $849.99
Sale Price: $818.00
Savings: $74.00
In Stock
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Phase 5 AMBI Battle Latch Charging Handle 308 Phase 5 Tactical - .308 AMBI BATTLE LATCH Charging Handle

Starting with a clean slate, the Phase 5 Tactical Ambi Battle Latch Charging Handle Assembly for AR10/308 rifles address many problems found with other handles on the market including beefing up the roll pin to a .1875" stainless coiled spring pin, as well a true asymmetrical design. The Phase 5 Tactical Ambi-Battle Latch Charging Handle Assembly assures a sure grip every time with full broad grip grooves on handle and release lever.

Our Price: $79.99
In Stock
(1)
Aero Precision M5 (.308) Stripped Upper & Lower Receiver Set - Red Barn Armory Aero Precision - M5 (.308) Upper & Lower Receiver Set

Aero Precision M5 (.308) Stripped Upper & Lower Receiver Set

List Price: $304.00
Our Price: $299.99
Sale Price: $269.99
Savings: $34.01
In Stock
(2)
Fortis Switch 308 Free Float Rail Fortis Mfg - SWITCH 308 Free Float Rail System (12.75"-15.75") BLK

Innovative quick removal AR308 keymod hand-guard from Fortis Mfg.

List Price: $259.95
Our Price: $249.99
Savings: $9.96
In Stock
(1)
Lancer L7AWM Magazine 7.62x51/.308 Translucent Colors Lancer - L7AWM Magazine SR25/AR308 7.62 - (Translucent Clear or Smoke)

We cannot ship these to the following areas: CA, CO, CT, District of Columbia, (Chicago, Aurora, Franklin Park, Oak Park, Riverdale) IL, MA, MD, NJ, and HI. It is the customers responsibility to comply with all state and local laws.

Our Price: $45.95
In Stock
Fortis RED (Rapid Engagement Device) Brake 7.62 Fortis Mfg - Rapid Engagement Device (RED) Muzzle Brake 7.62mm (.308) 5/8" x 24 - (BLK, or Stainless)

Finish off your AR308 barrel with this slick muzzle brake from Fortis Mfg. Available in stainless steel or nitride finish.

Our Price: $85.99
In Stock
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Hammer AR308 Charging Handle by Fortis - Nickelene finish Fortis Mfg - Hammer AR308 Charging Handle - 7.62 / .308 (Nickelene or Black Teflon Finish)

The new "Hammer" charging Handle from Fortis Manufacturing continues with the same quality an innovation you have come to expect. Designed, engineered and extensively tested prior to release the Fortis Hammer Charging Handle functions and performs flawlessly. Finished in attractive Nickelene™, for increased life and ease of cleaning.

Our Price: $75.99
In Stock
Elftmann AR10 AR308 Trigger curved or straight Elftmann (Elf) - AR-10/.308 Trigger - 2.5-4lbs (curved or straight)

Features aircraft needle bearings and user adjustable from 2.75-4lbs. Choice of Straight or Curved Configuration.

List Price: $259.00
Our Price: $249.99
Savings: $9.01
In Stock
   
 

Red Barn Armory has a great selection of AR 308 parts from top brands like:

  • Aero Precision
  • CMMG
  • CMT Tactical
  • Magpul
  • Lantac
  • Fortis
  • Mega Arms
  • Phase 5
  • Ranier Arms
  • Yankee Hill
  • DPMS and more
Whether you’re looking for AR 308 barrels, upper receivers, lower receivers, or any other AR 10 parts, Red Barn Armory is sure to have what you need to make your AR 10 into a personalized, high-quality rifle. We make DIY AR builds easy and affordable, and with FREE shipping on orders over $99, you save even more on your rifle builds!

We must receive or have on file a valid FFL to ship firearms, or lower receivers.