Shop now and get Free Value Shipping on most orders over $49 to the
contiguous 48 states, DC, and to all U.S. Military APO/FPO/DPO addresses.
Enjoy our FREE RETURNS
We want to ensure that making a return is as easy and hassle-free as possible! If for any
reason you are not satisfied with your purchase, simply return the item within 30 days of
receipt, and we'll cover the cost of return shipping. Learn more about our Return Policy.
Please Enable Your Browser's Cookies Functionality
Cookies are not currently enabled in your browser, and due to this the functionality of our site will be severely restricted.
Web browser based cookies allow us to customize our site for you, save items in your cart,
and provide you with a great experience when shopping OpticsPlanet.
Your privacy is important to us, and any personal information you supply to us is kept strictly confidential.
If you cannot enable cookies in your browser, please contact us — we are always here to help!
JavaScript is blocked by AdBlocker or ScriptBlocker
We're sorry - it looks like some elements of OpticsPlanet are being disabled by your AdBlocker.
Unfortunately we are unable to offer our excellent shopping experience without JavaScript.
Please add "opticsplanet.com" and "https://opl.0ps.us/assets-141dac529b5/" to whitelist,
or disable AdBlocker for this site (please note that we do NOT feature any annoying ads on this website).
Thanks!
Your Browser is Outdated
Unfortunately, we are unable to provide an excellent shopping experience on your browser because it lacks modern functionality needed for us
to provide a fast, secure, and enjoyable experience. If you cannot upgrade your browser or use an alternative device to visit us,
please contact us at +1-800-504-5897 and we'll be happy to assist you over the phone!
Rock river complete upper in 450 bushmaster - Rock River Arms A4 .450 Bushmaster Completed Upper
by
Plinker,
Verified Owner
from TX, United States
Written on January 17, 2026
Plinker's Review of Rock River Arms A4 .450 Bushmaster Completed Upper
Very pleased with this setup, I didn’t want to piece together my next build I found this and bought it. Put it on one of my lowers and slapped my red dot on it cleaned it and then took it out to my shooting range, unit performed flawlessly and the trigger is alot better than I expected. I would reccomend.
Would Recommend:
Yes
0 of 0 found the following review helpful.
Was it helpful to you? Yes|No
You said this review was not helpful.
Would you like to change your vote?
Your Browser is Outdated