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That's going to be a heavy gun.
 

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i can’t believe no one has ever really gotten into making these. seems like the market is flooded with UMP kits and USCs have gotten into silly $$ territory.. Dont get me wrong, i have a conversion and i love it. i just would have thought that with the market what it is something would have popped up by now.
 

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I have two of these receivers so any questions please ask! To be honest i wouldn't recommend these to anyone.... i will try and get a final weight for you guys i honestly dont believe it will weigh all that much more than the plastic receiver but i may be wrong (the steel trunnion in a UMP is quite heavy however i sent my sections off to be plastic welded and there a reason for that after receiving these receivers).... Anyone that's being honest about feedback about these receivers is not going to be good and i don't believe they are worthy of being used with any HK parts... Machining is pretty rough and very and i stress very much out of spec you will have to fit/modify any usc/ump part for each receiver i believe there is no interchangeability between my two AMP receivers. (Now to be far one receiver was given to me to replace one that was horribly out of spec however when you can visually see a barrel hole 1/4 off a center alignment that's alarming one would even mail it out to a customer)(And while my second receiver is night and day better it still shows terrible workmanship and im not sure i can save it ... TE37 build/review shares some of the same issues/frustrations i and others are facing and it would surprise me to see a functioning build using one of the these receivers which to my knowledge has not occurred yet.... I like other's on here dont back away from a challenge i will attempt to save at least one of these receiver but it will be no easy battle and i'm not going to waste a perfectly good pile of HK parts on this its not worthy i will cobble together some blow back bolt design and make my own barrel from a blank.... i debated selling my receiver but in all honestly im not sure i could do that to another person and i hope that's not whats going on on the sales i've seen on GB and AR15.... If anyone wants one id gladly part with the better of the two i paid $750 so there not cheap and you got a uphill battle ...I will not attack this person or his company i believe anyone involved in this hobby is beneficial and he as shared alot of his innovated designs....
 

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Can a person still buy one? Where are they to be found?

I have machinery, tooling, and software to do anything... skills to possibly clean one of these up... BUT what I can say is I am interested to take a look, at the bare minimum
 

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Well they have been pulled from his website many orders still havent been filled. Mine alone took nearly a year to recieve the first one and then 9plus on the secondth... there is a open thread about them on weapons guild look to be pretty much stalled now but they are pricey for what they are
 

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Where is this website? Lol. IDK... I have a 5 axis, Faro arm and a programmer that designed an AR lower for my buddy who is a class 7... IDK if he would be interested, but I really cannot imagine that this is something that would be insurmountable... what I don't have is a sampling or array of parts large enough to necessarily determine tolerances but it honestly distresses me that this hasn't been done yet...lol
 

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Can a person still buy one? Where are they to be found?

I have machinery, tooling, and software to do anything... skills to possibly clean one of these up... BUT what I can say is I am interested to take a look, at the bare minimum
Well, if you have all these resources, buy a USC converted to semi UMP and copy it.

Scott
 

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Just because you CAN do a thing, doesn't necessarily dictate that you must do that thing. I guess I was more or less thinking out loud... initially, having heard rumors of these "80 percent" receivers... I imagined a rough casting, or rough machined part that with enough work, could be made into a functional part. If an 80 percent receiver exists, then one could treat it as a rough part... primary ops complete... and then you just need the right person to complete secondary ops and finishing... something I could do for myself, by myself with a reasonable expectation that the input of labor would be proportional to the extracted sense of accomplishment when completed.

NOW, if it is the assessment the only owner I have had the pleasure of meeting, that these cannot be salvaged... then yes, the random thought of tooling up a solution comes to mind, however... I can't imagine it would be as simple as generating a point cloud, tool paths and then letting the Haas buck while I oil up some USC parts for installation. In fact, I wouldn't necessarily undertake such a job for myself... rather, I would value my own time at an amount of money and compare to the R&D time...quickly determining that I could simply buy a USC and build a clone myself... BUT if this was something people demanded or needed... I FEEL like it might then all of the sudden make more sense to get into.

I should have been more specific... sometimes I just think out loud and expect people to follow me...I do apologize
 

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Just because you CAN do a thing, doesn't necessarily dictate that you must do that thing. I guess I was more or less thinking out loud... initially, having heard rumors of these "80 percent" receivers... I imagined a rough casting, or rough machined part that with enough work, could be made into a functional part. If an 80 percent receiver exists, then one could treat it as a rough part... primary ops complete... and then you just need the right person to complete secondary ops and finishing... something I could do for myself, by myself with a reasonable expectation that the input of labor would be proportional to the extracted sense of accomplishment when completed.

NOW, if it is the assessment the only owner I have had the pleasure of meeting, that these cannot be salvaged... then yes, the random thought of tooling up a solution comes to mind, however... I can't imagine it would be as simple as generating a point cloud, tool paths and then letting the Haas buck while I oil up some USC parts for installation. In fact, I wouldn't necessarily undertake such a job for myself... rather, I would value my own time at an amount of money and compare to the R&D time...quickly determining that I could simply buy a USC and build a clone myself... BUT if this was something people demanded or needed... I FEEL like it might then all of the sudden make more sense to get into.

I should have been more specific... sometimes I just think out loud and expect people to follow me...I do apologize
The kits are out there and a full auto bolt can be easily modified for use in a usc all the 9mm and 40 usc conversion are doing this.... receiver mods are quite simple too quick visit to HDPS and you'll see what i mean he has a nice set of pictures explaining the differences (plus there are numerous threads on just this topic). Now these Prexis/precision american rifle receivers (i guess the 80% is listed on the website).... i was planning on just using these as a pattern worse case scenario (mine are serialized receivers) i honestly think a airsoft shell would work better with a steel reinforcment
 

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The kits are out there and a full auto bolt can be easily modified for use in a usc all the 9mm and 40 usc conversion are doing this.... receiver mods are quite simple too quick visit to HDPS and you'll see what i mean he has a nice set of pictures explaining the differences (plus there are numerous threads on just this topic). Now these Prexis/precision american rifle receivers (i guess the 80% is listed on the website).... i was planning on just using these as a pattern worse case scenario (mine are serialized receivers) i honestly think a airsoft shell would work better with a steel reinforcment
Extremely on point. I suppose you are right... oh well.. it was a fun idea, but you're right... probably not practical
 

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Well with kits out there i would say very practical.... UMP .40 kits can be had for $750 if you could keep your cost low there would be a huge market for these the demand for these aluminum receivers and 80% was nuts however i seeing these being dumped for what people can get out of them because the machine work is poor. (i needed up locating decent receiver sections over the last two years so i had it re-welded by tommybuilt should have here back in a few days) however im still sitting on two aluminum paper weights and i do believe they are just that..... i believe between the reweld and these i can design something alittle more basic to get some of these girls back up and running... however im working out of a garage nicely equipped one but still a garage) i would love to see affordable receivers hit the market.. I'm a huge akbuilder so there is where the steel inner receiver idea comes from in anyone is wondering... (the plastic shell if used at all might add a little stiffness to the receiver while still remaining on the lighter side..... ive also seen recently a thread about brainstorming about 3d printed receivers that would be a another idea to look into and its more true to the original bloodline of the UMP
 
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