Radical Firearms Complete AR-15 Lower Receiver with B5 Systems Stock & Grip

Manufactured by Radical Firearms
SKU: FL-B5
MPN: FL-B5
Manufactured by Radical Firearms
17 Reviews
$219.99 $249.99

In Stock

NOTE: Limit 20 per household. Quantities exceeding 20 will not allow checkout.

Standard orders will ship out within 2 business days or less. FFL orders will ship within 5 business days or less as long as we have the information for the transfer destination.

Items that are regulated by the ATF have restrictions and requirements: 
•Your entire order will ship only to a Federal-Firearm License holder.
•Please contact your local FFL prior to placing your order to ensure they are still accepting transfers.
•A copy of your order/invoice as well as the current FFL license for your local dealer must be emailed to ffl@primaryarms.com.

Details

Details

The Radical Firearms Complete AR-15 Lower Receiver is an easy way to get started on your next build. The lower is built to Mil-Spec out of forged 7075-T6 aluminum and hardcoat anodized black. It comes with all Mil-Spec components installed and features a B5 Systems pistol grip and B5 Systems stock. Get started building your next AR-15 carbine today with this complete lower receiver.

Features:
  • Forged 7075-T6 aluminum
  • Hardcoat anodized black
  • Mil-Spec dimensions
  • B5 Systems pistol grip
  • B5 Systems stock
  • Carbine buffer


Radical Firearms offers law enforcement grade hardware. Crafted with quality materials and covered by their lifetime warranty, Radical Firearms is an outstanding choice for any budget.
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Specifications

AssemblyComplete Assemblies
BrandRadical Firearms
Caliber MarkingMulti-Caliber
FinishHardcoat Anodized
Receiver Material7075-T6 Aluminum
Trigger Pin DiameterMIL-SPEC .154

Ratings & Reviews

17 reviews

4.8
  • 3 stars
  • 0 reviews
  • 2 stars
  • 0 reviews
  • 1 star
  • 0 reviews

Very satisfied

by -

Several years ago I bought an upper with rails to replace my DPMS handled upper. The item has been brought back to life with this great lower assembly

Quickly Start a Build with this Lower

by -

Excellent complete lower for the price. It's a very solid mil-spec assembly that quickly was built up to a full AR-15 with no hassle.
<br>I used this as a basis to build up a Heavy Barrel .223 Wylde rifle.
<br>I upgraded the furniture with the recent Magpul Sale featured on Primary Arms, although I'll say that the B5 furniture equipped on this lower is awesome and very solid. I'll be saving those pieces for a stripped lower later this summer!

Decent lower!

by -

It’s a tight lower.I used my hammer and punch set to seat and tap out the take down pins. After 4 tear-downs to clean. I can remove/install by hand now normally! Stock is nice an tight. Grip is ok. But I’ll be changing it. Overall! I’d buy another.

USMC veteran review

by -

For the money, I don’t think this can be beat. $99 for a complete lower with B5 furniture. I’ve put about 450 rounds through this rifle and had zero FTF. ZERO issues.
<br>That being said, this is not going to compare to a DD, KAC, or similar quality rifle. It is a great rifle to hunt small game, plink away at some steel or just shooting to have fun. Hope this helps your decision. Be safe and Semper Fi.

good budget lower

by

Bought this on sale at a great price from Primary Arms. $250 with $50 bonus ucks reward Lower seems to be solid and well made. No issues so far 200+ 5.56 rounds in.

USMC Review pt. 2

by

I left a review a few days ago; and since I purchased two of these… I just wanted to add that it comes with an AMBI-SAFETY SELECTOR as well!! For $99 you can’t go wrong, hell the B5 parts, selector and parts are worth more then that!

Good price when on sale

by -

Great value when on sale and $50.00 in bonus bucks as a bonus. It isn't equal to a Daniel Defense lower, but still not bad at this price point.

Not Bad.

by -

Decent lower if stripped and giving it 5 stars because primary arms gave a damn good deal on it and because it came with B5 furniture. Bonus bucks on top of that.
<br>Believe it or not, radical barrels in grendel are pretty darn accurate for the price. If they would build a high quality handguard there complete rifles would be awsome.

USMC veteran review

by -

For $99, you can’t beat this deal. It even comes with B5 furniture! Slap on an Aero, PSA or RF upper, AND FOR ABOUT $450-500 you have a nice base of an AR. Ooh Rah!

Great for the money

by -

My lower locked up well on my upper. No play. Furniture is modern and great. Trigger was a little gritty. Nothing a little polishing doesn’t fix. Not a fan of the ambi safety. Could not figure how to remove so I could replace with a standard milspec one. I would buy it again.