Enjoy free shipping during the holidays! 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 Extended FREE RETURNS
We want to ensure that making a return is as easy as possible! With our Hassle-Free, Extended
Holiday Returns, eligible orders placed from November 12, 2025 on will benefit from an extended
return deadline (January 13, 2026 or 30 days after receipt of your order - whichever is later).
We'll even 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-5351ccd9953/" 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!
Milspec- or "how i learned to stop worrying and love quality components from bcm, colt, or st" - Obsidian Arms Enhanced AR-15 Bolt Carrier Pin Kit
by
LyingProphet,
Verified Owner
from FL, United States
Written on July 2, 2023
Tried popping these into an 8920 milspec carrier as part of my 300 AAC build. The cam pin and firing pin went in as expected but the cotter pin was incredibly fussy. Tried just about everything short of hammering it in to get it to fit. Still wouldn't budge.
Swapped out the cotter pin to a different carrier and it refused to get set in place. Tried using a BCM cotter pin with the Obsidian Arms firing pin in the new BCG - didn't work.
In frustration, I removed the Obsidian Arms components and replaced them with identifiably milspec BCM equivalents. Worked like a charm. While a mildly fascinating exploration in more affordably priced parts from an unknown brand, they are functionally useless.
Pros:
Affordable
Cons:
Grossly out of spec
Best Used for:
being returned
Would Recommend:
No
0 of 5 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?