Any idea when this will be out? I emailed Adams Arms and got no response. It is all that my new build is missing.

They said early to mid april, but the obvious answer is 2 weeks

On the aa web site now for pre-order

Is this the same kit with the non railed gas block that Spikes had a short run of a few years back? Or is the gas block going to be thinner?

So...this will fit under almost all rails? That's what it looks like.

Ya it should fit under most rails, I know that's what their goal was. Plus it has 8 settings instead of 3 like the low pro and standard gas blocks. Can't wait until they sell it by itself.

So weird. I have been checking the sight daily for 4 weeks for even a sliver of info and the second I post up here, bam, it is up on the website for pre-order. Done!!! Just pre-ordered it.

Any love for existing owners of your systems?  The ability to purchase just the XLP gas block so we can upgrade would be nice.

Now this looks nice for sure. I only wish ya folks would bring some conversion kits to the 308 side so us DPMS 308ers could have the same advantages we do with the 5.56 platform. I think theres only POF and LWRC currently who has piston 308's so it'd be awesome if you folks joined in on the market to do a AR10 conversion.

I would think that you would give us some high quality pictures and some detailed info like you did wiih the original kit before offering a pre-order.

I thought AA said this was going to work with most rails AND barrel nuts. The picture they have shows the same type of piston rod cup/spring that caused it to NOT work with anything other than a mil spec barrel nut.
Using a rail that mounts via mil spec barrel nut is not bad, but AA needs to clarify this before people start ordering this kit and finding it doesn't work with "other" free float rail barrel nuts.

will this fit under the BCM Key Mod Rail?

No one knows for sure, but the VERY STRONG guess is no.  No one knows if it will fit under but aside from that the barrel nut will not work with it.  See my posts later in this thread from the new AR products section

New Products - AA XLP Piston Thread

Or as Maverick said...   You need a mil spec barrel nut, or one with the same dimension muzzle to chamber direction.  I would also assume that it would need more support than just the lower 1/4 of the rod bushing.  I am going to see if I can get information on the Syrac Ordnance piston system.  If this will not work with a KMR I am going to go a whole different direction that I am not at liberty to post in open forum.  

Syrac Ordnance Piston System

I don't get it. Why would you design a new gas block that is compatible only with the standard barrel but which is being phased out by basically EVERY hand guard manufacturer out there? The key mod rail system is becoming the new standard for rails and not a single one uses the standard barrel nut except for the samson evo KMR! As a customer of AA and observer of the AR platform's progression, I have to say this is just stupid... The only thing that makes this seem reasonable is that there is no way the gas piston system AA has designed, would work on other styles of barrel nuts unless they completely redesigned it.

Pretty upset, I was so excited for this new gas block and putting a new hand guard on my AA rifle, but now it looks like I can't put a single hand guard I want on my rifle...  

You just had the disappointing "Now I get it" moment we are all having.  This is why everyone is is upset.  We ALL were hoping that this would work with any hand guard and it doesn't.  Its ok my friend I feel your pain.  We were led to believe that they did redesign it when all they did was redesign the gas block.

Ya and now I am trying to decide if I should get a pws mk114 or just go with a DI upper like the BCM BFH... Not to change the topic but this forum doesn't have much info on PWS, it's like a LWRC fanboy club house! Can't believe how many people have the money to buy this rifles !!

Anyway, I will more than likely still get this gas block an use te VDI Quick Diconnect KMR.I don't really have any other choices for my 5.45 AA build. Is everyone else that is looking for more real estate on their AA builds, just waiting it out or what are some of your plans to resolve this issue we all have in common?

My XLR just shipped. Should have it by Friday.

By the way, I am using mine with the Sampson rail so it doesn't matter for me about the standard nut. But the solution for using it with any barrel nut is pretty simple and doesn't have to have any thing to do with the gas block. The Adams Arms uses a spring on the piston rod, which keeps it from moving the full travel of the bolt carrier group and falling off of the piston housing. The stop for this spring rests against the standard barrel nut. POF solves this by making the tube the piston rides in long enough so that even at full travel, the rod would never fall out, and by doing this they eliminate the spring (with the bolt locked back you can hear the rod moving back and forth). Barrett puts the spring stop at the point the rod enters the upper, which would be a very easy fix for Adams Arms. This makes it so the portion of the rod over the barrel nut only occupies the space of the gas tube, and works regardless of the barrel nut used.

Adams Arms kits are worth waiting for. I have one on my Bushmaster. It has worked flawlessly for over 2 years now. Love it!

Unfortunately the rails I really like all have proprietary barrel nuts. I have the mid length AA kit with a Samson Evo rail and it's very nice, but hoping one day they will keep tweaking to get these things lighter and lighter. Cleanup was quick and easy that's for sure.

I'm loving my AA and will NEVER do DI again. I guess I love the AR platform (for all it's ergo's and accessories) but never liked the AR operating system. Thank God for piston conversions!

I recently purchased a AA Lite Conversion Kit for my S&W M&P-15. I had previously installed a full floating handguard so the change over was fairly simple but I did have to go with a handguard compatible with the kit. I chose a Samson 7-EX.  I did have a small hiccup with the bolt carrier in the kit. I got in touch with Cody from AA thru this forum and the situation was swiftly handled.


http://i244.photobucket.com/albums/gg3/denafer/017.jpg

BEAUTIFUL rifle you have there!

I'm going to defend AA a little here because a large portion of the blame as to why these piston kits only work with Mil Spec barrel nuts is because the mil spec barrel nut is the only thing consistent on the AR platform that AA can use. Think about all the rail makers out there and then find two that use the same proprietary barrel nut. It doesn't exist. You can't expect AA to devise a rod that fits both mil spec barrel nuts AND all the different specific nuts that these rail manufacturers use. It's impossible so it's a lose lose for AA.

We are lucky that Adams Arms is gaining in popularity like it is and we are seeing more and more rails show up on the market catering to the AA gas piston system, but to be mad at AA because your favorite rail has a proprietary nut that won't work with the AA design is childish. If anything we should be putting pressure on these rail makers to come up with adapters or rails that actually use a mil spec nut instead of complicated hardware that only fits their own rails.  

Samson and Fortis are making very nice rails right now and it's only a matter of time before we see stuff like Keymod and ultra lightweight thin rails for the adams arms system, but let's put blame where blame is due there is no way Adams arms can control the types of nuts these rail makers use nor can they make a system that works with all of them. The only way I see AA creating something that works with every type of barrel nut is to add a shroud of some kind with a place for the spring cup to fit in that slides over the barrel not and still manages to line up with the rod bushing in the upper and then what if different barrel nuts are different circumferences or thicknesses?

Anyway, my rant is over I guess I just understand the design limitations and think people are placing anger at the wrong people.

While I agree to an extent, there ARE probably ways to make a piston rod compatible with different length nuts. Such as: threading the rod, and using two jam nuts to sandwich the spring WHEREVER you want. Another option would be move the spring more forward and use metal "sleeves" to get the correct spacing against the receiver front, itself. There are ways to make it adaptable. AA chooses to keep it to Mil spec length, and that's fine. The anger isn't so much as to be limited to mil spec length nuts, it's that we were (at first) under the assumption it was NOT limited to this.
Yes, also true, I'd like to see more rail manufacturers catering to the AA system (and eventually, they probably will). Like mentioned, Samson, Fortis (and lets not forget the excellent MI 2 piece FF rails) are compatible. All is not lost. There are still a few options for rails (actually the same ones as with their prior system) but now you can chose your length. It's definitely a step in the right direction.

I like the spring cup against the upper instead of the barrel nut idea.

I'm using a DIamondhead VRS-T rail and had to dremel the nut ever so slightly, and put a flat side on the bottom of the spring cup on the op rod.  This eliminated all interference between the op-rod spring and cup and the barrel nut.  If you're wondering, no, I didn't weaken the nut.  The grooves where the clamping screws pass through the nut are a certain depth, and I didn't have to get anywhere near that depth to create the necessary clearance.  Here about 1500 rounds later everything is dandy, and being on the nut under the handguard you can only see the work if the handguard is removed to expose the barrel nut.

Is it perfect?  Not exactly, but it allows me to run my rifle exactly like I want to with the equipment I want, with no detriment to the rifle's operation or appearance.

Color me heavily disappointed. I was REALLY hoping to run this under an SLR rail on my WOA upper.

Looks like a new market for  custom barrel nuts to fit the AA system. Maybe most of the nuts could be notched to allow for the proper rod spring clearance.Just a thought.

Couldn't find an anserw and was curious if those piston will work with the KAC URX