American Defense Quick Detach Trijicon ACOG Mount

32 Reviews

In Stock

Standard orders will ship out within 2 business days or less. FFL orders will ship within 5 business days or less as long as we have the information for the transfer destination.



The American Defense B3 modular base was designed to accept a variety of risers and optics. As a standalone mount, it is ideal for use with Trijicon's standard ACOG and VCOG scopes, as well as similar compatible optics such as the Primary Arms Compact Prism Scope line. Like all American Defense mounts it is precision machined from durable 6061-T6 aluminum with a hardcoat anodized finish for long service life.

This mount is designed to place standard ACOGs at an ideal height for AR-pattern rifles.

Featuring ADM's QD Auto Lock Lever system, the AD-B3 can be fully adjusted without tools to accommodate most Picatinny rail systems. This glove friendly locking system ensures the mount will not move until you need to remove it, and provides exceptional return to zero with mounted optics. It is also fully covered by American Defense's lifetime warranty.
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BrandAmerican Defense
FinishHardcoat Anodized
Manufacturer.American Defense
Optic TypeTrijicon ACOG Compatible
PlatformM1913 Picatinny
Quick ReleaseQuick Release
Weight3 Oz

WARNING: This Product can expose you to chemicals which is known to state of California to cause Cancer and Reproductive Harm. For more information, see

Ratings & Reviews

32 reviews

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Works great


5 stars. Best review ever.

Great delivery time.


Good product well built. And thank you for the fast delivery time Primary Arms. Great service!!

Great mount!


Great mount at a fair price. My wife bought me the 2.5x scope for a birthday present. I called PA weeks after the purchase and they gave me the discounted (package) price! Thanks PA!!



Great mount, fast delivery, be back for more....thanks PA!

Like everyone else has said...


Great product! Love te QD. I agree with the majority, this is the mount to get.

Excellent Product


I like this Item as it makes an easy job of quickdetaching a scope for the use of battle sights.A must for all AR type platforms.

Great product and customer service


I ordered this online to go with my 2.5x prism scope. I got an email a couple hours later that it had shipped!

Great Product, Great Price & Great Service!


I purchased the AD-B3 mount for my PA ACSS 2.5X scope. Easy to mount or dismount for BUIS or night vision gear. The folks at Primary Arms are ALWAYS so friendly and helpful. A wonderful low price and excellent high quality service!

work of art


I recently bought the Primary Arms 5X prism scope , and bought this mount to go with it . It is super easy to adjust , and holds the scope securely , ensuring excellent grouping at the range. It was a little longer than I needed for the base of my particular ACOG ; and so , I couldn't place the scope quite as far back on the rifle as I wanted ; but the extra length may help with the stability and security of the mount , so I really cannot complain -- also -- this mount , in my opinion , is one of the best looking of its kind -- perfect in form and function

Great Scope Base


I used this base to attach a Burris 332 to my AR-15. Very easy job to do, yet the scope is held firmly in place and does not move at all.