Kaiser US X-7 Fusion Receiver Set

[UWone77]

For those polymer fans:

Kaiser US (https://kaiserus.com/x-7-fusion-stripped-receiver-set/)X-7 Fusion Receiver Set

Stripped Black and FDE Upper and lower set

-Lower itself is 5.5 ounces

-Upper itself is 5.2 ounces

-Match fitted from the factory for supreme fit with zero action movement.

-Short strand and long strand fibers infused with virgin polymer not regrind.

-Impact modifier in the polymer

-7071 aluminum inserts around FCG and breakdown pins W/Hard anodizing

-7071 aluminum buffer tube mount W/Hard anodizing

-Textured outside surface with raised grooves on mag well for positive grip

-Limited Lifetime warranty.

Flexible magazine well that will flex and revert back to shape if crushed.

Disclaimer: The X7 Fusion (https://kaiserus.com/x-7-fusion-stripped-receiver-set/)upper must be assembled using the Geissele reaction Rod. If the Receiver fails due to using a saddle type action device when assembling your upper your warranty is void.

Price: $250

Image showing the combined weight of our lower and upper. Image showing 5.5 oz weight of our black upper Image showing 5.5 oz weight of our FDE lower

https://kaiserus.com/x-7-fusion-stripped-receiver-set/


http://i849.photobucket.com/albums/ab55/UWone77/Kaiser_opper_lower-6243_zpsr16xqwnz.jpg (http://s849.photobucket.com/user/UWone77/media/Kaiser_opper_lower-6243_zpsr16xqwnz.jpg.html)

[Dstrbdmedic167]

As a set I really like this. I have no issues with poly despite the fact I really need to mill out my JMT lower lol

[UWone77]

http://i1016.photobucket.com/albums/af282/richdkim77/IMG_3461_zpshik8cnrj.jpg (http://s1016.photobucket.com/user/richdkim77/media/IMG_3461_zpshik8cnrj.jpg.html)

[Liberal_Strong]

oh whoa, i think i saw Stick post a pic up but didnt know Kaiser receivers are made of polymer..also cant help make the name associated with Kaiser hospital lol

[SINNER]

Why? I see no reason for this unless it was dirt cheap and it's not.

[UWone77]

Why? I see no reason for this unless it was dirt cheap and it's not.

I hear you. It's definitely not cheap.

I have no opinion on it yet, as I haven't build it up and shot it. It is however, prime for a lightweight build, but not sure I want to dump funds for a true lightweight build.

[Aragorn]

Doesn't help that it's REALLY ugly.

[toolboxluis00200]

I can understanding a 22 build. But at that price I a m not sure

[Dstrbdmedic167]

The biggest issue I see with it is if you don't have a reaction rod your looking another $100 just to put this set together and keep the warranty. Not that I don't want a RR but I don't like the idea of having to buy a tool just to put this set together

[UWone77]

I'm going to get this put together in the next few weeks. We'll see how it runs.

http://i1016.photobucket.com/albums/af282/richdkim77/IMG_3462_zps0uuurshg.jpg (http://s1016.photobucket.com/user/richdkim77/media/IMG_3462_zps0uuurshg.jpg.html)

[SINNER]

Man that thing is ugly.

As light as possible build?

[UWone77]

Man that thing is ugly.

As light as possible build?

I'm not to confirm or deny that it's ugly. [:D]

I was looking at some V7 and BAD components for a possible LW build, but I don't think I want to dump that much cash into it. I've seen a few lately at RA that people have built up to the lightest possible AR and they don't run.

I think I'm going to build this one up as just a standard 16" carbine and see how it operates.

[SINNER]

I for one am not a fan of ultralight builds. Mass = stability and a few pounds makes very little difference until it's shouldered and then it's a detriment.

Then again I've hunted with a 22 lb rifle and hiked 8-10 miles with it. Lol

[UWone77]

I for one am not a fan of ultralight builds. Mass = stability and a few pounds makes very little difference until it's shouldered and then it's a detriment.

Then again I've hunted with a 22 lb rifle and hiked 8-10 miles with it. Lol

I'm with you. I think LW builds the last few years has turn into full retard mode. Cutting here and there, removing material from just about everywhere and making it out of Ti, and for what?

[SINNER]

For tacticoolness, certainly not functionality.

[JoshAston]

I'd take the 2A-Arms Balios Lite over that thing.

AFAIK, I built the first sub 4lb AR 5 years ago. It's fully functional. Several people have gotten down to about 3.5 lbs now a days. I'm shooting for 3.

[UWone77]

http://i1016.photobucket.com/albums/af282/richdkim77/IMG_3508_zps6jmcrfp6.jpg (http://s1016.photobucket.com/user/richdkim77/media/IMG_3508_zps6jmcrfp6.jpg.html)

[voodoo_man]

stahhpppppp

my wallet is crying

[tact]

I'd take the 2A-Arms Balios Lite over that thing.

AFAIK, I built the first sub 4lb AR 5 years ago. It's fully functional. Several people have gotten down to about 3.5 lbs now a days. I'm shooting for 3.

I prefer that as well, I just hate that they didn't add the FA.

[JoshAston]

I prefer that as well, I just hate that they didn't add the FA.

None of my ARs have FA. I refuse to own one that does.

[SINNER]

LOL

[ghouck]

They do not sell uppers or lowers alone, only in sets. Somewhere I read that their receiver sets are "fitted". As a former machinist, I must question what they are doing that requires them to "fit" their receivers when it seems nobody else needs to.

They also are not responding to emails asking if I can buy a lower with two uppers. Something is weird here, I don't know why they would be restricted to selling them in sets, and if there were a good reason, why won't they share it?

[PRE-EMPTIVE STRIKE]

And yet another, I guess whoever makes the coolest designs nowadays wins the over saturated ar market.

[usbp379]

Anyone have first-hand experience? I kind of have an itch for something like this.

My concern is how well the set would stand up to impact like getting dropped or accidentally knocked off a shooting bench or something. Not that I make a habit of dropping my stuff but sh!t happens.

[usbp379]

Another thing I'm wondering about is the long term durability of the upper. How does the upper's rail hold up when an optic is attached and the gun is shot time and time again? Will the optic mount wear against the plastic rail?

[UWone77]

Another thing I'm wondering about is the long term durability of the upper. How does the upper's rail hold up when an optic is attached and the gun is shot time and time again? Will the optic mount wear against the plastic rail?

I built up the lower and used it at the range. No issues with my limited use with it.

I have the upper, but my plans to build it up haven't materialized yet. Only because I have other projects in line first. Like you, I'm kind of curious how a polymer upper will last with some long term use.

[usbp379]

Interesting. I didn't realize the lower would accept a stock GI upper. I guess I just assumed they were somehow different because KSP only sells complete sets.

[UWone77]

Interesting. I didn't realize the lower would accept a stock GI upper. I guess I just assumed they were somehow different because KSP only sells complete sets.

Sorry, let me clarify. I used my lower with a buddy's Kaiser upper. I just never inspected his upper after use to see if there were any particular problems or wear issues.

Good question though, let me find my Kaiser lower and see if I can drop a milspec upper on it.

[UWone77]

Quick Cell phone pic, and yes, it fits this BCM upper just fine. No binding either when charging the handle

892

[Uffdaphil]

I'll spring for a poly when they form a hot 3D Athena or Freya warrior goddess on the magwell prow. Grippy with flexible D-cups