Instruction: Given a question and the related document, predict if the question is answerable based on the information provided in the document. Output only yes or no.

Input:
Question: Is the sight height-adjustable? My gas block sits about 1/4" lower than my rail, so I'm not sure if I need a gas-block type.
Document: This sight is very well made and mounts solidly on weaver/picatinny rails. The only problem is that it is meant to be mounted on a gas block NOT the same rail height as the rear sight. That is the only reason I didn't rate it 5 stars. It needs to be mounted about 1/4" lower than the rear sight to funtion.
This Front Sight Aperture sits about a quarter inch too high. All mil-spec sights, and aftermarket sights sit at a common, standard height about 1/4&#34; lower. In order to make this sight POSSIBLY work, you would have to wind the front sight post until it is nearly flush with the plane it rests in, and that would block half of your sight picture. TRASH! Don't cut corners, buy something from a reputable manufacturer.
It's about 1/4" lower. So, when other reviewers noted that this sight will be too high if mounted on a pic rail that is as high as the rear sight rail, I thought that it might be about right for my setup. My gas block rail is low, so I needed a taller sight.So far, so good.
Bought it to use on my flat top AR along with the UTG carry handle. I like the combination. Keeps zero and looks good doing it! Make sure you have a low profile gas block. If you gas block is the same height as your receiver rail, this is not for you!Make sure that you get a four prong front sight tool if you don't already have one, you'll need it to set the zero on your rifle.
This is a product that was well received on my end. After attempting to try a standard BUIS system, it was evident that the DPMS with gas block rail would need a short riser for a proper alighnment of the front sight. The gas block rail is not even with the rail on the upper receiver. Did the 1/2" riser work? Yes. However, I wasn't all that satisfied with the appearence of a riser beneath the front sight. This front sight did the trick.
I ordered front sight to install on a 22LR build that has the railed gas block,fits very well and looks good also.Machining is great and the clamp fits the rail very well.I would say it's $17.00 well spent.My front block rail is the height that's lower than the receiver,so this one seems to be the right height in case anyone is wondering.
Beware!In and of itself this detachable sight installs just fine. Its quality also seems fine. The problem is that many AR type rifles have different elevation profiles for front, mid, and receiver rails. With this sight, there is no way to adjust its height so that it will always co-witness with the UTG detachable back-sight that may be mounted at the same, higher, or lower rail elevation!
a lot of bad info out there. this tower sight is used with mil spec railed gas block. the low profile is used with front rail at same height as rear rail. this info from utg web sight. i mounted this tower front with utg rear match sight on ar build using dpms upper and lower,24 in. ss barrel at 50 yds hit center of bull with no adjustment sights at zero. good as it gets.
Well made, looks great on my 715T. Front pin is adjustable but you will need 4 prong front sight tool. I bought the utg 4/15 A2 front sight tool and it works fine.
Quality of item appears very good, metal surface and coloration are free of any defects and match the color of my rifle perfectly. Installs very firmly on my gas block and lines up perfectly with the front sight. The only reason I gave it 4 stars instead of 5 is that I feel the installation (tightening) knob is a little larger than it needs to be, but it's really no big deal. I'm very happy with the item.
Answer: yes