Diamondhead USA D-45 ISS Initial Review

F22_RaptoR

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So as many of you are aware (as the U.S. Department of State export Limit has been raised to $500 USD), Rainier Arms is now exporting items up to $500 dollars with a 50 dollar export fee, so with them carrying the full line of Diamindhead USA products the D-45 Swing Sights I have been after were available so I managed to snap up a set!

Firstly to say, Dealing with Alex at Rainier Arms has been an absolute Pleasure! Their website is not exactly set up for international orders right now, so I placed an order directly through their International Export guy; Alex. After my order was placed he created a Rainier Arms Account with the info set up for me, with instructions on further purchases to be placed through the website and then confirmed through Alex by Email with order number (that way your Credit Card info stays secure).

I am sure they will be working on getting a full Canada Export section set up on their order section in the near future, but Alex wanted me to say they are definitely willing to take advantage of the $500 dollar limit for Canadians! Although compared to Brownells they DO charge an extra fee for export, it's very reasonable for items such as the D-45 Swing Sights (which are IMPOSSIBLE to find right now so cost wasn't an issue right now). They ship Fedex which was about 25 bucks for Brokerage from Fedex which is pretty decent. On these higher priced orders we can definitely expect more customs brokerage to happen, the 100 dollar limit spoiled us a but I think.


For the Diamondhead USA D-45 I.S.S. (Integrated Sighting System) or D-45 Swing sights. There are many internet 'reviews' of these sights that get into the basics for a video review, but now many on the technical details, so I will try to give as much info on them as I can! Obviously any questions I'll be more than happy to answer!

First Image: D-45 Sights folded down. The sights stay in a 'locked' position even if bumped or hit. Many reviews seem to lead to the conclusion that the upwards swing is only held in place by a spring detente, which is incorrect. There is a locking lever bar that is hit by the right-most roll pin on the sight base, this actually unlocks the upwards swinging section allowing it to flip upwards into sight. If this part is not 'hit' the sight can't flip up, and therefore under actual usage conditions won't "accidentally" flip into your scopes F.O.V. It can only flip up and fully open if you press the deployment lever. You must be a little more cautious of placement, as these sights actually take up almost 3.5" of rail space front to back when stowed! They can use ANY standard Ar15 front sight post, which is nice for fibre optic or Tritium sight posts.

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Image 2: Sights up: The sights stick out about 1.75" from the right side of the gun, and don't protrude more than any flashlight or laser you would put on a side rail. I purposely put mine a few notches back on the front rail so I could grab in front of the sight when stowed. If you have a longer rail you could put it right up front. If bumped from a forward or sideways direction they will simply fold out of the way without being bumped at all, which is nice for durability sake. For a bump from the rear, the sights seem to be pretty robust and would take a bump from a door frame without too much issue. The sights fling out sideways first then the detente is unlocked and the sight unlocks upwards.

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Closeup of the sights around the Leupold CQ/T. As you can see all the edges are nicely de-burnished and there is not much to snag on. If moving forwards the sights will naturally want to fold out of the way if something hits it! The actual rail grabber is a nice steel piece that is keyed into the sight base with a big post, which is a VERY tough design. The sights seem to be no more complicated than they NEED to be; just enough parts to get the job done. All the springs seem to be beefy and the spring action is quite stiff which is good for rapid-fire, so you don't have to worry about your sights flopping around.

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The Diamondhead USA diamond aperture is one of the cool standard features on their sights. Unlike a standard circular sight, your eye REALLY seems to suck the diamonds into each other, target acquisition at 5 yards or 25 seemed to be VERY quick and easy. The apertures are same-plane with a small and large for long-range and short range shots. It really does suck your eye into the middle!

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So here are my final thoughts on the sights:

They are VERY well made, fit and finish is outstanding (which is probably why the availability is what is is, they are scarce with limited production), and the target acquisition is great on them. They flip out fairly easily with some oomph and don't flop around. (the release button requires a bit of pressure, not something you could accidentally open up).

They DO require a bit of rail space to properly use, as they form a zig-zag shape when stowed, Ambi-charging handles (like the rainier Arms Raptor) require a little more though. I put my rear at the 3rd from the back cross slot, and would actually prefer 4th cross slot, as the lefty charging handle pad is a bit cluttered when the sights are opened. When they are folded down the 3rd cross slot is completely fine. Both sides of the Raptor are completely accessible. Front Sight doesn't have any issues at all, anywhere from the very front to just under the scope seem to work fine, but you have to be careful with lights/lasers as the sight base is pretty wide, and can hit it, or deny access to the deployment button. They will work with plenty of room with a Daniel Defense PAK mount though, the Gear Sector mount I currently have requires the sight to be further back (which again; is nice because I can wrap my hand around in front of it)

They will work with left-handed use as well, you just turn the rifle 45* into your chin, although not the most comfortable use it's doable for sure!


I'm sure I've missed some stuff for now, but again; I'll be more than happy to answer any questions on these things!
 
Thanks for the review and that's really a beautiful AR.

Thanks! Hopefully with Rainier (and in the near future Brownells) going to the 500 dollar limit, we'll start to see some more cool stuff coming up here now!

OK, where did you get the wood AR grip from? I want!

Karl Nills, from Germany. nill-griffe.com ;) if you have 270 bucks floating around; it's probably one of the most ergonomic grips I've ever felt! Friend has one on his Swiss Arms rifle, and you can get them with the adjustable palm rest, and without (as mine is)
 
Great review! Thanks. Diamondhead products are excellent. I have the Rainier Charging Handle which shows their quality. Where did you get that Leupold?

Gord
 
Outstanding!!!!!

Thank you! :)

Have you done a review of those rails by chances ?

I love the way they look, but the weight specs on that seem jacked up.


I actually have not done any real review on the Diamondhead Handguard other than a few comments, I suppose I can do a mini-review here for you!

Compared to a VTAC/Troy Alpha rail, the diamondhead is a teeny bit heavier. One big difference you have to account for is the barrel nut though!

The Troy/VTAC uses the factory barrel nut without delta ring, and has 3 little locking pieces to attach the rail. The Diamondhead has a massive steel barrel nut with 2 cutout channels around the diameter for the clamping screws to pass through (this provides a mechanical lock to prevent the handguard from pulling off, whereas some just use clamping force and friction). Very good design for the barrel nut, similar a little to the HK416 and Geissele ones.

There are 2 big downsides to the handguard IMHO, the first is the clamp screws are threaded directly into Aluminum (and only about 4-5 full intact threads it grabs into), so without a torque wrench you can have issues with it stripping. I accidentally over torqued one of the clamp screws and had to use Heli-Coils to repair it, which isn't the worst thing in the world but worth mentioning. I would much prefer a Chicago screw style, or a steel threaded insert in the handguard, but that's just my preference. If you're careful and don't over torque it it's not a big deal.

The second is the anti-rotation tabs, which have almost 1mm of space between them and my upper (A Vltor MUR) so with being careful not to over-tighten the clamp screws, there isn't much preventing it from rotating out of alignment. I put the Magpul RSA as a backup to prevent rotation. I would much prefer a little bit of fitting and the tabs being too tight, than having them too loose and being essentially useless. Those are the ONLY gripes I have about the handguard!

The upsides! Now I really like the AFG, but this was a real battle because the handguard is SO comfortable as-is that an AFG is almost not needed. The flatter surface is pretty much perfect for barricade shooting if you like the 3-gun, OR a perfect point to add a Harris Bipod. You can actually see I put a sling stud on the very first hole on the bottom, so I can pull the AFG back and add a bipod on. The diamond shaped cutouts along the bottom/side are a perfect fit for fingers to slip into, and the vents actually sit at the correct angle so your fingers can grip into them to get even more grip. Very ergonomic grip, just the right shape to grab onto, so if you don't like the angle an AFG puts your hands at; this one does it very well.

The hole spacing for rail accessories is 40mm apart, which is actually what the Magpul MOE rail sections are, as well as MDT Tactical rail sections. I have a Magpul 11-slot rail section on the bottom (the 11 slot ones need a teeny bit of egging out of one of the holes because it's 81mm or so) and an MDT Tac 5" rail section on the side to cantilever out my flashlight so I can get my grip right up front. Thinking of a 6" MDT section for the bottom so I can use a QD Bipod and my AFG. So as far as getting rails for it, it's not that difficult to do! I would personally suggest a flat head screw style rail, because the side rails will want to sit at an angle, so you want a bit of side-to-side rotational freedom.


The weight isn't actually that bad at all, again compared to a VTAC/Troy Alpha or the DD Light rail this one feels quite nice, and because a big chunk of the weight is the steel barrel nut which sits right at the back of the gun, its not too nose heavy at all!


Great review! Thanks. Diamondhead products are excellent. I have the Rainier Charging Handle which shows their quality. Where did you get that Leupold?

Gord

Thanks! I am very pleased so far!

The CQT has actually been sitting in my closet for years. My friend ordered 2 of the last ones Brownells Had when they were still legal for US Export, one day I go over and talked to him about them and he said "Well, guess what I have in my closet!" Brand new in original Leupold box - factory sealed CQT :p

You can actually find them quite often on the EE, and for WAY less than what I got mine for. Compared to my Vortex Viper PST 1-4, I think the CQT has a wider field of view at 1x and less fisheye effect. The downside is it's fairly heavy and not much for mounting applications. Funny story, the entire reason I was trying so hard for the D-45 swing sights, is because I could not get for love or money a LaRue QD base for it!
 
I don't think these offset sites are quite as popular as people predicted. Personally, I prefer a decent optic with a good 1x
 
I don't think these offset sites are quite as popular as people predicted. Personally, I prefer a decent optic with a good 1x

The CQ/T has a great 1x option, as does my Viper PST 1-4. It is however, nice to have a backup sighting option (especially for a permanent mount like the CQT as opposed to a QR system like the LaRue mount for the CQ/T). The transition from optic to sights is very quick and natural, right there where your eyes are without having to mess around with taking a scope off or something! AND no batteries ;)

As for popularity, time will tell - but at the current moment Diamondhead and all the venders carrying them are completely out of stock (except for Rainier Arms as they just got their stuff in). they can't keep up with production! Who knows, they may become uncomfortable to use and I'll go for something else, but that's why I'm only doing an initial review now, hopefully I'll be able to get out and shoot soon and test them out in actual circumstances.

Now it's completely up to user preference as to what style of setup you want for your sighting systems, but I personally like a backup, and not having to take an optic off (as with my Benelli M4s90 and my USC/UMP conversion - and QR optic mounts) is actually a really nice touch IMHO! Plus with these they will fold down and completely out of the way, nothing to snag or or anything. That's was my biggest dislike for sights like the Dueck Defense set, so big and bulky sticking out of the side!
 
Having them flip is a nice option...but if these are to be backup sights, I don't see the harm in removing the optic, must people run quick detach mounts for this reason

Most qd mounts have repeatable poi's when being taken on and off
 
The CQT has actually been sitting in my closet for years. My friend ordered 2 of the last ones Brownells Had when they were still legal for US Export, one day I go over and talked to him about them and he said "Well, guess what I have in my closet!" Brand new in original Leupold box - factory sealed CQT :p

You can actually find them quite often on the EE, and for WAY less than what I got mine for. Compared to my Vortex Viper PST 1-4, I think the CQT has a wider field of view at 1x and less fisheye effect. The downside is it's fairly heavy and not much for mounting applications. Funny story, the entire reason I was trying so hard for the D-45 swing sights, is because I could not get for love or money a LaRue QD base for it![/QUOTE]

I just checked with Brownells regarding another model of Leupold Tactical Scope. The response indicated that they have some sort of an agreement with Leupold that restricts them for exporting Leupold scopes. I did find a Canadian source for the Leupold 1X Prismatic scope. So it seems they are being exported, possibly through Korth.
 
I just checked with Brownells regarding another model of Leupold Tactical Scope. The response indicated that they have some sort of an agreement with Leupold that restricts them for exporting Leupold scopes. I did find a Canadian source for the Leupold 1X Prismatic scope. So it seems they are being exported, possibly through Korth.

Yes, Korth Group is the Leupold carrier for Canada, however the US Department of State banned the CQ/T from export as the retical isn't a "duel use" retical. Very confusing situation, I've heard from Korth that it actually has to do with the adjustment dial/turrets being ITAR controlled or something as well? Not much idea, other than Korth won't bring them in anymore at all. Of course that may have changed by now, I know the Prismatics are coming in, I've seen em at a few places before.
 
Ok, I don't usually get excited about gucci rifles, but sweet mother of god, that wood grip is beautiful, as is the entire rifle.
 
Ok, I don't usually get excited about gucci rifles, but sweet mother of god, that wood grip is beautiful, as is the entire rifle.

Thanks for the additional info on the Leupold Mr. F22. I just emailed Korth so I'll get that straight.

Echoing Mr. Mauser, that rifle creation of yours has re lit the fire. For a while I was satisfied with the way I pimped up my Stag. There is nothing quite so stunning as a set of Nill grips. I have them on my SIG P-210 now and have had sets for my other SIGS too. I find it hard to understand how Nill achieves the wonderful fit and finish. The ones on my P-210 are so tightly fitted that it's difficult to remove them. The screw is almost redundant.

I love precision in all things. Those Rainier charging handles are a good example of over engineering so common on many European items. Your AR will be the model for my next build if I don't break the compulsive urge.

Gord
 
Never seen folding offset sights before, only fixed ones, which interestingly only seemed to show up on my coner of the internet at the same time Syndicate was released.

Fancy rifle, good thing I just spent a few hundred bucks, or I'd be overwhelmingly tempted to call ATRS and spend a few thousand.
 
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