Review: TangoDown Advanced Combat Bipod (Model ACB-4)
I finally got my TangoDown Combat Bipod in on Friday after an almost 4 week wait. I put it on my Sig 556 SWAT the same day and took it out on Saturday. I have to say, the wait was definitely worth it. First here’s the product detail’s straight from the packaging:
- Low Profile Design
- Built-in Cant and Traverse
- Silent Leg Release Mechanism
- Adjustable Legs
- Available in Black & Flat Dark Earth
- Elliptical leg design folds tight against Mil-Std 1913 rail forearm
- Three-position leg deployment detents for adjustable height
- Dual locking bars fit Mil-Std 1913 accessory rail grooves
- Positive release buttons prevent accidental deployment
- Large, aggressively corrugated feet assure solid platform
- Weighs 16.5 ounces, 9 inches OAL (closed)
- Made in the USA
I had no issues attaching it to the rail on my Sig 556 although you have to keep in mind this bi-pod doesn’t have a quick detach mechanism. It mounts to the rail using a two fastener clamp which attaches using a 5/32″ Allen key. That kinda sucks but the allen key is easy enough to stick in the grip or forward grip. The fasteners are captured so if you’re taking it off don’t worry, you wont lose’em if you loosen them too much. When I first installed it I did end up moving it back one notch as it was hitting the SWAT rail’s bayonet attachment ring, no biggie just keep an eye out for it (I overlooked it at first).
Leg deployment is silent and easy, just reach forward, momentarily press the leg unlock button, and deploy the leg 90 degree’s until it locks in place. Repeat for the other leg, or if your like me and have large hands, you can use your thumb and index finger and deploy both at once. Same thing goes for stowing the leg’s but in reverse.
As the product spec’s says the elliptical leg design folds tight against the rail. This is where I ran into my one and only issue. I always keep my TangoDown QD BattleGrip attached to the rail, unfortunately, on the side with the grip QD detachment the leg will not fold closed all the way and lock in place. The leg ends up hanging up on the QD mechanism (picture goodness below). If this is a problem for you, you might want to use a different foregrip such as the one from Knight’s Armament which is twist tight and skinny enough to where it shouldn’t be an issue. A TangoDown stubby grip should also work (its whats shown on the packaging) or one of the older non-QD TangoDown grips should work as well. I also have a sure fire E2D Defender on a LaRue Tactical Inline Flashlight QD mount on the right rail. Thank’s to LarRue’s excellent engineering (as always) the mount did not interfere with stowing the bipod legs. Just make sure the QD mechanism for the flash light mount is on top.
Everything else was exactly as advertised, the legs go from an over all length of 9″ when closed to about 11.5″ when fully deployed. The aggressive feet provide an excellent base that let you easily traverse providing a solid shooting platform. The bi-pod is built like a tank (for how solid it is I was expecting it to be a lot heavier than it is), theres no springs or any other frill’s that can catch or cause you to get tangled up, and you sure as hell don’t have to worry about the bi-pod collapsing on you when its fully deployed and extended.
In a nutshell, for me the leg not locking when I have the QD Grip attached isn’t a real issue, but, I don’t have to take this gun out in the “sandbox ” I’m not a LEO nor , and special “Operator”..I’m a computer geek. Right now the leg mechanism is still tight enough where the leg doesn’t accidentally deploy (this might change as it see’s more use). The SWAT rail on the Sig556 is already heavy enough, and while 16.5 Ounces isn’t bad I’d rather keep the gun light so I typically only attach the bi-pod when I’m going to use it at the range. At 16.5 it is still light enough that I can attach it and run through the brush to take out some Hog’s at the brother in-laws place if I would need too.
This bi-pod has been on the market awhile, so if your looking for a new bi-pod you should take a good hard look at the TangoDown Advanced Combat Bipod…You won’t be disappointed.
- TangoDown Bipod and Sig 556 Bayonet Ring
- TangoDown Bipod Fully Extended (Right Side)
- TangoDown Bipod Fully Extended (Left Side)
- Bipod Leg catches on TangoDown Grip QD
- Lay’s flat against rail on side with out QD
- LaRue mount does not interfer with the bipod
- TangoDown Bipod with legs not extended
- Underside of TangoDown Bipod








Hey man, just a quick note. Bipods are made to be mounted on the weapon so that they fold forward. This allows them to flex smoothly when firing supported. Otherwise you’ve got a lot of unnecessary movement due to the rigidity of the support.
True, for some.
But the tangodown is designed to fold back
Ah, I stand corrected, thank you.
I tried this out on my socom 2 and was disappointed. The legs get in the way of the forward pistol grip. Id say for a precision rifle that doesnt have a pistol grip itd be fine, but a potential room clearer? Nope. I went with the GGnG bipod instead. Very pleased with it.