AR Front Flip-up Site Question... Suggestions requested


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tsanford405
March 7, 2008, 10:52 PM
Hey, I am trying to find a front flip-up sight for my AR-15. I am in grad school and don't have enough time to research as much as I would like. I have a Rock River Arms "Government Model." I am looking for quality but not to break the bank. I am curious what all I will need to get one rolling, I am not completely sure what I need such as a gas block or whatever. I am looking for a shopping list basically so I can research very specific items. Any help would be greatly appreciated. Thanks all!

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Guitargod1985
March 7, 2008, 10:56 PM
Check out the sights at Yankee Hill Machinery. http://www.yankeehillmachine.com/store/sights.html

They aren't exactly cheap, but they aren't as expensive as many of the other brands you'll find.

TIMC
March 8, 2008, 12:29 AM
I have GG&G on one of my AR's They are very nice.
http://www.gggaz.com/index.php?cat=38

GunTech
March 8, 2008, 12:59 AM
I have a Yankee Hill on one and a Young Mfg on the other. Depends on what you like. Both replace the gas block. The young has a spring and pops up when the button is pressed. The YHM requires you to flip it up.

http://guntech.com/m16/m4s.jpg

tsanford405
March 8, 2008, 01:16 PM
What all is needed, just any gas block and a front flip up sight? Are there any others besides the GG&G that combine both?

Coronach
March 8, 2008, 01:43 PM
OK, hold on a second.

If you already have a gas block (which I assume you do ;) ), you don't need to get a gas block/front sight combo. You just need a flip up front sight that mounts on the quad rail.

Now, you can get a combination sight/block, but you'll be adding cost and time/effort (it will require you to do gunsmithing, or take it to a gunsmith) for fairly minimal gain.

I just did a "back up iron sight" research session, I know that YHM, GG&G and the other ones mentioned here are very decent. I went with Troy Industries (I was looking for a rear sight).

Mike

SwampWolf
March 8, 2008, 01:50 PM
Any thoughts/opinions on the "UTG" rear sight? CDNN is selling them for $29.99.

tsanford405
March 8, 2008, 02:10 PM
I haven't altered anything on my rifle yet. It was my understanding that the front site on AR's act as gas blocks, so that when you removed that you have to replace it with something and also the new site. I thought that one can acquire these either combined or as two separate pieces. Is this correct or am I ignorant? :)

Coronach
March 8, 2008, 02:56 PM
OK. Perhaps I'm confused on the configuration of your rifle. Can you post a picture, or show me which rifle on RRA's site that you have?

I was assuming that you have a rifle with a low-profile gas block and no front sight. However, do you have the standard "triangle" front sight/gas block combo? If so, why do you want to replace that?

Mike

Schuey2002
March 8, 2008, 02:59 PM
Any thoughts/opinions on the "UTG" rear sight? CDNN is selling them for $29.99.
IIRC, "UTG" = CCC!

(Cheap Chinese Crap)

;)

nitestocker
March 8, 2008, 03:08 PM
hay gun tech i sure like the one on the button

tsanford405
March 8, 2008, 03:55 PM
Yeah, it is just a typical triangle one. I want to replace it for the mere fact that I want the option of having a clear Eotech sight.

Cesiumsponge
March 8, 2008, 04:17 PM
YHM is a good budget BUIS. I have one.

The more expensive ones might have slightly better features or ergonomics but you'll pay double the price for it. I have a GG&G spring loaded front unit as well as a Midwest Industries spring loaded unit. The spring loaded ones are nice, but its also one more feature that might break. Much of it comes down to aesthetics and ergonomics.

Here is the important part:
If you don't have an existing railed gas block, you will need to get one. These can vary a lot in pricing. If you go with a railed gas block and a rail-mounted front sight, the front sight MUST BE FOR GAS BLOCK HEIGHT. The rail handguard BUIS units are shorter so if you accidentally get one of those, it'll be too short on the gas block to use properly. Make sure you select the right height.

To save you money, you can get gas blocks with a built in front sight and it cuts down on mechanical complexity. YHM makes several (http://www.yhm.net/store/sights.html) and some of them retain your sling and bayonet lug.

Vltor (http://www.vltor.com/vst.htm) makes a slick unit as well but it costs much more.

SwampWolf
March 8, 2008, 10:43 PM
Thanks, Schuey 2002. I'm looking for a reasonably priced "BUIS" unit (fold-down style). Any suggestions? (Don't mean to hijack this thread but I think the topic is somewhat related).

GunTech
March 9, 2008, 01:34 AM
A picture being worth a thousand words, here's the Young Mfg front sight:

http://guntech.com/m16/sight_1.jpg

http://guntech.com/m16/sight_2.jpg

Available from brownells:

http://www.brownells.com/aspx/NS/store/ProductDetail.aspx?p=19614&title=AR-15/M16%20FRONT%20SIGHT%20GAS%20BLOCK

The upside to this sight is that it is spring loaded and the press of a button deploys the sight instantly. You can activate it with a simple press of a butting using one finger.

The downside is that it is a press fit, and once you drive it down the barrel, it's not coming off easily. Better get it on right the first time.

Here's the Yankee Hill:

http://guntech.com/m16/sight_6.jpg

http://guntech.com/m16/sight_7.jpg

It's pretty easy to mount using clamps.

http://guntech.com/m16/sight_8.jpg

Also available from Brownells:

http://www.brownells.com/aspx/NS/store/ProductDetail.aspx?p=21446&title=AR-15/M16%20CLAMP-ON%20FRONT%20SIGHT%20GAS%20BLOCK

There's a version with or without bayonet lug.

Finally, here's a matching flip up A.R.M.S rear sight

http://guntech.com/m16/sight_3.jpg

http://guntech.com/m16/sight_4.jpg

http://guntech.com/m16/sight_5.jpg

Hope that helps.

Darthbauer
March 9, 2008, 01:43 AM
IIRC, "UTG" = CCC!

(Cheap Chinese Crap)

I second that. Most UTG stuff is made for airsoft guns and would break or not function properly on a real rifle.

Why do you need a flip up front sight? http://www.lewismachine.net/product.php?p=67&cid=2&session=d81abbfd99e4295ed9ff9e815c591784


Try that. Its at your ready when you need it without having to push any buttons. That and I have had many friends with problems with flip BUIS.

GunTech
March 9, 2008, 01:49 AM
As long as you have it when you need it. I like my BUIS out of the way when not in use, but I don't want to have to rummage through pockets if I need them, and the have to mount them.

KC&97TA
March 9, 2008, 03:16 AM
I have an extra upper coined "the poor mans SPR"... it has a J&T gas block from midwayusa, $32 with shiping and giveing some change to the NRA.

I have a Brownells flip up sight, I think they are $42, it secures on with 2 allen head screws, which for some reason don't like to be tightened down or they interfear with the "popping up".

I also have a YHM flip up sight which I think is $78, it tightens with one screw that has a slot and has grips to be hand tightened, it popps up and locks in the up possition... for what it's worth the YHM is double the price and was aquired more for my .308 project... the brownells does the job, just the same, but the YHM is a better product than the cheap one.

Coronach
March 9, 2008, 06:14 AM
I want to replace it for the mere fact that I want the option of having a clear Eotech sight.Do you have your Eotech mounted yet? If not, you may want to try it and see if you are really bothered by the front sight assembly. Most people think it will be in the way, but once it is tried out a few times, it becomes a non-issue. That is most of course, not all.

Try lower third co-witness, as opposed to absolute co-witness. This will push the front sight assembly down into the lower portion of the Eotech and leave 2/3rds of the sight free for red dot goodness. Your dot will seem to float in space significantly above the FSP.

Mike

GunTech
March 9, 2008, 11:16 AM
I have an extra upper coined "the poor mans SPR"... it has a J&T gas block from midwayusa, $32 with shiping and giveing some change to the NRA.

I have a Brownells flip up sight, I think they are $42, it secures on with 2 allen head screws, which for some reason don't like to be tightened down or they interfear with the "popping up".

I also have a YHM flip up sight which I think is $78, it tightens with one screw that has a slot and has grips to be hand tightened, it popps up and locks in the up possition... for what it's worth the YHM is double the price and was aquired more for my .308 project... the brownells does the job, just the same, but the YHM is a better product than the cheap one.

The YHM front sight shown above includes both the front sight and gas block and retails for $91.50 (dealer is much less) compared with $74 for your example gas block plus sight. $17.50 price difference. The J&T is also frequently out of stock. It's also aluminum versus steel for the YHM (if that matters to you) and includes a sling swivel and bayonet lug (if that matters to you too).

Not a bad deal.

GunTech
March 9, 2008, 11:22 AM
I would also like to note that the only time I have ever used BUIS is when they were required by the match. Battery failure is the only other reason, which is why I always carry spare batteries in the grip of my AR.

If battery life is an issue, get an Aimpoint Comp3 or Comp4 and change the batteries once a year, Battery life is 50,000 and 80,000 hours respectively (that's over 5 years continuous use).

I've never seen a high quality electronic sight fail from damage that wouldn't also take out irons. Military grade optics are to the point that BUIS are like wearing a belt and suspenders. For joe average shooter the only reason for them is appearance.

How many of you have BUIS on your scoped deer rifle?

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