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Rainier Arms

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Complete Upper Receivers

Complete Upper Receivers

Rainier Arms RUC 5.56 NATO DI Complete Upper - 16"

5.0 star rating 2 Reviews

Special Price $664.00 Regular Price $830.00
Starting at 0% APR or $66.69/mo with . Learn More

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Noveske N4 Recon Gen 4 5.56 NATO Complete Upper - 16" Black

$1,496.25
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Rainier Arms / Rellim Arms AR-15 5.56 NATO Take Down Upper Receiver Assembly - 16"
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4.8 star rating 30606 Reviews

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Verified Reviewer

0.0 star rating

06/12/25

Review by Anonymous User

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06/12/25

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Chris A.
Verified Reviewer

5.0 star rating

06/11/25

Top 1X Prism

Review by Chris A. on 11 Jun 2025 review stating Top 1X Prism
For the money you pay, you wont beat this beast. Crystal clear, large sight picture, and holds zero reeeaaalll nice. As long as you aren’t a potato, you’ll hit everything you aim at with it within 100yards, and I was constantly on steel (12in x 12in) with it at 200yards.

Lifetime warranty? Are you kidding?

Just run this, and thank me later.

Also, Rainer Arms, can’t go wrong with this great company.

On Atibal P1 Solar 1x Motion Activated Micro Prism Optic

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06/11/25

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Kevin A.
Verified Buyer

5.0 star rating

06/07/25

Barrel nut.

Review by Kevin A. on 7 Jun 2025 review stating Barrel nut.
Looks good works great

On V Seven Weapon Systems Titanium GI Barrel Nut

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06/07/25

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Mic N.
Verified Buyer

5.0 star rating

06/05/25

Perfect

Review by Mic N. on 5 Jun 2025 review stating Perfect
Best investment for magazine made to my AR

On Driven Arms Co. AR15 Standard Forged Slip Fit Magwell

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06/05/25

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CB
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5.0 star rating

06/05/25

It do be saying "compact" in the name

Review by CB on 5 Jun 2025 review stating It do be saying "compact" in the name
If you get a compact grip and don't like that it's compact idk what to tell you lol. This grip is exactly as described and looks cool.

On Driven Arms Co. Utility Compact Grip (ULCG Gen 2) - Apex

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06/05/25

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Rodney S.
Verified Buyer

5.0 star rating

06/04/25

Hmm

Review by Rodney S. on 4 Jun 2025 review stating Hmm
Works well so far

On KCI USA AR-15 Polymer Magazine - 30rd (10 Pack)

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06/04/25

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Gas Block Diameter .750" Remove This Item
Thread Pitch 1/2x28 (.22 cal) Remove This Item
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