JavaScript seems to be disabled in your browser. For the best experience on our site, be sure to turn on Javascript in your browser.

Rainier Arms

Pursue Your Passion

Menu

Account

Home
Rifle Parts
Receiver Parts
Complete Upper Receivers

Complete Upper Receivers

Sons of Liberty Gun Works M4 Patrol SL 5.56 AR-15 Upper - 16"

$617.50
Starting at 0% APR or $30.83/mo with . Learn More

Add to Wish List Add to Compare
Noveske N4 Shorty SS 5.56 NATO Complete Upper Receiver - 10.5" Black

$1,401.25
As low as $152.12/mo with . Learn More

Add to Wish List Add to Compare
Riflespeed / Rainier Arms UCR AR-15 5.56 NATO Upper Receiver Group - 10.5"
★ Reviews

Popup content starts

Reviews by

close Popup

These are real reviews
from real shoppers

4.8 star rating 30635 Reviews

Site Reviews

Product Reviews

WRITE A REVIEW

* Indicates a required field

* Score:

* Title:

* Review:

You are connected as

Connect with:

-OR-

* Use your name:

* Email:

Review's title & body can't be empty Question's body can't be empty Please enter a star rating for this review Name field cannot be empty Invalid email Your review has already been submitted. Max length was exceeded Please fill out all of the mandatory (*) fields One or more of your answers does not meet the required criteria

Thank you for posting a review!

We value your input. Share your review so everyone else can enjoy it too.

share

share

share

Thank you for posting a review!

Your review was sent successfully and is now waiting for our staff to publish it.

Verified Reviewer

0.0 star rating

07/04/25

Review by Anonymous User

On

share ' Share Review by Anonymous User facebook facebook Share Review by Anonymous User twitter twitter Share Review by Anonymous User LinkedIn linkedin Share Review by Anonymous User

07/04/25

Was this review helpful?

0

0

J
Jonathan K.
Verified Buyer

5.0 star rating

07/02/25

Great product

Review by Jonathan K. on 2 Jul 2025 review stating Great product
Fit perfectly on my Mac 5. No complaints.

On Lee Sporting Aluminum MP5 / SP5 / HK Clone Lower Housing - Full-Size Push-Pin

share ' Share Review by Jonathan K. on 2 Jul 2025 facebook facebook Share Review by Jonathan K. on 2 Jul 2025 twitter twitter Share Review by Jonathan K. on 2 Jul 2025 LinkedIn linkedin Share Review by Jonathan K. on 2 Jul 2025

07/02/25

Was this review helpful?

0

0

T
Timothy B.
Verified Buyer

5.0 star rating

07/02/25

Good magazines at a great price. Thanks!

Review by Timothy B. on 2 Jul 2025 review stating Good magazines at a great price. Thanks!
Good mags at a great price.

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

share ' Share Review by Timothy B. on 2 Jul 2025 facebook facebook Share Review by Timothy B. on 2 Jul 2025 twitter twitter Share Review by Timothy B. on 2 Jul 2025 LinkedIn linkedin Share Review by Timothy B. on 2 Jul 2025

07/02/25

Was this review helpful?

0

0

T
Thinh L.
Verified Buyer

5.0 star rating

07/01/25

Sig P320 30rd 9mm

Review by Thinh L. on 1 Jul 2025 review stating Sig P320 30rd 9mm
Great 30rd mag, like new function and operation like they should for a lot less.

On Sig Sauer P320/P250 9mm Extended Magazine - 30RD (Open Box)

share ' Share Review by Thinh L. on 1 Jul 2025 facebook facebook Share Review by Thinh L. on 1 Jul 2025 twitter twitter Share Review by Thinh L. on 1 Jul 2025 LinkedIn linkedin Share Review by Thinh L. on 1 Jul 2025

07/01/25

Was this review helpful?

0

0

W
William B.
Verified Buyer

5.0 star rating

07/01/25

Nice

Review by William B. on 1 Jul 2025 review stating Nice
Nice

On UN12 Magazine - Issue 18

share ' Share Review by William B. on 1 Jul 2025 facebook facebook Share Review by William B. on 1 Jul 2025 twitter twitter Share Review by William B. on 1 Jul 2025 LinkedIn linkedin Share Review by William B. on 1 Jul 2025

07/01/25

Was this review helpful?

0

0

W
William B.
Verified Buyer

5.0 star rating

07/01/25

Perfect fit

Review by William B. on 1 Jul 2025 review stating Perfect fit
Fantastic peice of machinery. Never felt more like a cowboy till I slapped this bad Larry on the echy

On Sharps Bros Echelon Improved Grip Module - Black / Brazilian Cherry

share ' Share Review by William B. on 1 Jul 2025 facebook facebook Share Review by William B. on 1 Jul 2025 twitter twitter Share Review by William B. on 1 Jul 2025 LinkedIn linkedin Share Review by William B. on 1 Jul 2025

07/01/25

Was this review helpful?

0

0

1 2 3 4 5 6 7 8 9

Reviews by

Popup content ends
$880.00
Starting at 0% APR or $43.93/mo with . Learn More

Add to Wish List Add to Compare
Riflespeed / Rainier Arms MK1 AR-15 5.56 NATO Upper Receiver Group - 11.5"

$880.00
Starting at 0% APR or $43.93/mo with . Learn More

Add to Wish List Add to Compare
Riflespeed / Rainier Arms UCR AR-15 5.56 NATO Upper Receiver Group - 12.5"

$880.00
Starting at 0% APR or $43.93/mo with . Learn More

Add to Wish List Add to Compare
Riflespeed / Rainier Arms MK1 AR-15 5.56 NATO Upper Receiver Group - 14.5"

$880.00
Starting at 0% APR or $43.93/mo with . Learn More

Add to Wish List Add to Compare
Riflespeed / Rainier Arms MK2 AR-15 5.56 NATO Upper Receiver Group - 13.9"

$880.00
Starting at 0% APR or $43.93/mo with . Learn More

Add to Wish List Add to Compare

Now Shopping by

Gas Block Diameter .750" Remove This Item
Color Black Remove This Item
Caliber 5.56 NATO Remove This Item

Clear All

Shopping Options

My Wish List

Last Added Items

You have no items in your wish list.

Google Customer Reviews

Google Customer Reviews