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FMK Firearms AR1 eXtreme .223 Remington Black AR-15 Lower Receiver

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Specifications

Action Single Action

Finish Blue/Black

Weight 4.3 ounces

Caliber / Gauge .223 Remington, 5.56 NATO, .50 Beowulf

Manual Safety No

Mode Of Operation Semi-Automatic

WARNING: This product can expose you to chemicals including arsenic, which is known to the State of California to cause cancer. For more information, go to WWW.P65WARNINGS.CA.GOV

Description

Product Overview

The FMK Firearms AR1 eXtreme stripped AR-15 lower receiver is manufactured in the USA from a high impact proprietary composite polymer, delivering extremely lightweight durability at 4.3 oz. Built as a mil-spec AR-15 foundation, it accepts standard MIL-SPEC uppers and is engineered for long-lasting reliability with compatible lower parts kits.

Key Features

Stripped AR-15 lower receiver built on a mil-spec compatible platform
Proprietary composite polymer construction for superior strength and durability
Extremely lightweight design at 4.3 oz
Accepts standard MIL-SPEC uppers up to .50 Beowulf when paired with the correct upper configuration
Compatible with most current AR-15 lower parts kits, grips, and stocks

Build your next AR-15 project with the FMK AR1 eXtreme polymer foundation and pair it with your preferred upper and components.

Out Of Stock

4.7 | 35 Reviews

SKU:: FMKGAR1E
UPC:: 850979004338
BUDS ID:: 90315

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Customer Reviews (35)

Q & A (4)

Retail Availability

Customer Reviews

4.7 out of 5

35 total reviews

85%

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Latest Reviews

Kristopher G.

4 weeks ago

Verified Purchaser

Nice and lite works as...

Nice and lite works as intended.

Jamison S.

1 month ago

Verified Purchaser

Very happy with my...

Very happy with my receiver! Thank you again buds!!

William M.

2 years ago

Verified Purchaser

I have built 2 budget...

I have built 2 budget rifles off of these lowers and they have worked exceptionally well. Main use is plinking with a 16" 5.56 upper.

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Questions & Answers

Q: IS LOWER ALL ALUM ??

Author: Damon B.

(3) ANSWERS

A: Hi Damon, this is not aluminum. Made from space age materials, the AR1 eXtreme lower is made from an impact resistant polymer blend selected specifically for the construction of firearms. The lower is so strong it can be used with any mil-spec upper chambered in everything from .22lr all the way up to the powerful .50 Beowulf. Specifications and Features: - FMK Firearms AR1 eXtreme - R15 Stripped Lower AR1EXTREME - Superior strength Built with proprietary composite polymer to withstand extreme conditions - Unmatched durability When most lowers dent or break the AR1 eXtreme bounces back to shape - Extremely lightweight - Accepts all standard MIL SPEC uppers up to .50 Beowulf - Compatible with most current AR15 lower parts kits, grips and stocks - Unconditional lifetime warranty - High Impact Proprietary Composite Polymer Frame - Multi-Caliber - Mil-Spec - Overall Weight 4.3oz - 100% USA Made - Matte Black.

Author: James G.

A: No its high tech plastic Multi-Caliber, Mil-Spec, AR15 Lower Receiver, manufactured in the USA of a high impact proprietary composite polymer

Author: Randy I.

A: Nope, high speed plastic it is.

Author: Lynn N B.

Q: Would this be good for a .224 valkyrie build ?

Author: Anonymous

(3) ANSWERS

A: Frank, yes Sir. This is a quality lower and will be a very good base for your 224 Valkyrie build.

Author: James G.

A: Hi Frank, Absolutely buddy. This is a quality lower and will work excellent with your 224 Valkyrie.

Author: Steve P.

A: yes it will be a good 224 Valkyrie lower

Author: Randy I.

Q: Will this lower work with a 6.5 Grendal build?

Author: Antonio Y.

(4) ANSWERS

A: Yes it can be used for a 6.5 Grendel

Author: Randy I.

A: Yes, this Lower receiver is multicaliber meaning you can make it into any AR-15 chambered round, including 6.5 Grendel. Hope this helps.

Author: Josh T.

A: Antonio, Yes, on an AR-15 chambered lower in 5.56 you can buy a 6.5 Grendel upper and install it on your lower.

Author: James G.

A: Yes sir. This lower is multi-caliber. Stay safe and happy plinking!

Author: Adam P.

Q: Can I pair this with a .410 upper?

Author: Victor U.

(4) ANSWERS

A: Hi Victor, yes sir, as long as the upper is mil-spec, it will work. Stay safe & have a great day!

Author: Ed C.

A: Hi Victor and welcome. Yes Sir. I highly recommend the Charles Daly .410 upper : https://patriotdefensearmory.com/product/charles-daly-ar-410-complete-upper-410-ga-19-barrel-5-rounds/ ----------- Cheers, stay safe and enjoy!

Author: James G.

A: Yes, you very well can as mentioned, aslong as the upper is mil-spec.

Author: Jason L.

A: Yes you can. Mil spec upper required

Author: Christopher L.