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-75f31a26068/" 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!
Geissele Hk Mr 5.56 Trigger 05-220 Color: Black, Trigger Shape: Curved, 10% Off w/ Free S&H
Special offer available for this product! Chat with us and mention RAD
*Clearance and Blazin' Deal models do not qualify
Limited Time Offer. Click here to see!
Limited Time Offer! Order Now
You've been selected to receive a special discount on this product. Use the applicable coupon code at checkout to claim your offer.
These savings won't last, so don't delay! Limited time only. Cannot be combined with other promotions or offers.
Good trigger, on par with their SSA or G2S model. Breaks at roughly 4lb 13oz. Smooth takeup , breaks pretty clean with very minimal creep. Hopefully that works it’s way out after a bunch of rounds. My other Geissele triggers have virtually no cre...
Read More...
While I ended up returning this trigger NIB to Optics Planet, and ended up going with a Geissele HK 416 SSF instead, the HK Geissele trigger is a definite upgrade in line with what many have come to expect from Geissele. The stock HK trigger is not b...
Read More...
Since writing my previous review, I have purchased the HK MR556 A4, and installed this trigger along with the Haus Tool 'SELECTOR AXLE HK MR95 HAUS'. All features of the A4 remain operational with the exception that I cannot SAFE the gun unless hamme...
Read More...
I'm always looking for the best deal possible; Optics Planet had the best price for this trigger, Defense Depot had the best price by far for the MR556.
The rifle comes with a good trigger, the Geissele is better. The spring design of the Geissele t...
Read More...
The trigger that comes stock on the mr556 is a great trigger. This is just a slight upgrade but it’s worth it and the money. It’s expensive but definitely worth it. It’s crisp and feels great. Optics planet is always amazing and super fast with shipp...
Read More...
Help support American manufacturing! Marked models of this product have gone through rigorous review and been certified by the manufacturer as Made in the USA.
Product Info for Geissele Hk Mr 5.56 Trigger
The HK MR 556 trigger is similar to our SSA Trigger and can be used in both the HK 556 and semi-auto HK 416's. After installing the MR 556 trigger you must cock the hammer in order to engage the safety unlike the HK trigger system where you can place the selector on Safe with the hammer forward.