Vitor upper not compatible with Aero Ambi lower… arghhh

Throwing everything but pure unobtainium at my 6 ARC build. Was at the LGS and a Aero Ambi Lower followed me home, after three days…. Build it up, swap the stock and everything over try to put it on to check the fit for the tension screw- and it the upper won’t close on the lower. WTF

The ambi controls on the right side interfere and hit the VOLTR forward assist housing. ARGHHH,

It was going to be so pretty…

Well that’s a bummer. Do you think the non FA would fit? It would suck to tear the build down to swap uppers, but if that combo is what you want…

I mean the FA/deflector comes off by removing a roll pin, but I don’t think they sell the non-FA deflector separately. Pretty sure it voids the warranty as well.

Sorry man.

Can’t Vltor convert it to non-FA? I’ve had great luck with the customer service in the past.

Not to rub salt in a wound, but another reason I hate ambi lowers.

TBH, the AR is ALREADY a very southpaw-friendly gun, just needs an ambi safety and a Norgon-type mag catch. Stab the bolt release with the tip of your right middle finger, work the mag release button with right thumb or ambi-release with right birdie and you’re there, and you don’t even have to break firing grip to do it.

As Lee Lapin used to say, “MINDset, SKILLset, TOOLset - in that order.”

1 Like

They should have a label or something. I would expect it not to fit, though, just like the LMT MARS. I have avoided the VLTOR because of this.
The FCD upper receiver is designed to work with the MARS and I would guess the Aero would also work. Unfortunately, it is billet, but oversized.

Solved it! Took out my Dremel and just kidding. The thought did cross my mind, but I quickly squashed it. I did wonder about taking the offending interfering part of the bolt catch and bending it to make it clear. Not sure if it is steel or aluminum.

Swapped the lower stuff back to my Noveske lower.

This is my first ambi lower. I’ve played with the Norton and BAd levers and looked at the LMTs, but no one had them locally, and ordering them was a pain. I really only bought this one because we are staring down an AWB here in CO, maybe. That and like I said, I’m throwing everything at this build- like down to the JP operating system. So those two reasons combined I was like ‘why not’. Already had some other lowers and guns on the BGC.

I did get the offending part off and I’m going to mock up a ‘bent’ part and try 3D printing it. I have some CF nylon, but this would be the perfect use of the BASF ‘metal’ filament. THe CF nylon is pretty gangster and the part isn’t that stressed- and this is my gamer gun.

I do like the Aero lower use of threaded ‘pins’ for parts like the bolt catch.

I did 3D print a front pin aid that holds the spring and the little detent so it is much easier to install. Kind of like the EZ install pivot pin that AEro does.

Something else - most ( if not all ) JP Operating Systems have that big, cool looking "scallop" on display in the ejection port.  Point being forward assist notches start further to the rear on the carrier body compared to a "milspec".
  And then the forward assist assy. on the VLTOR upper is positioned further forward then " milspec ".
The result is a rather limited range of "assist" that is actually available with a JP BCG in a VLTOR upper.

Took me more than a few tries to get it, but I think I have it now.

Original on left and bottom, mine to the right and above. White was the initial work in PETG, the black is PA carbon filled. Pretty strong. Clears under the VLTOR and is a bit ‘proud’ to the standard.


That is really cool.

I’m working up an adaptor that takes a standard Harris bipod with a sling stud mount, to a Picatinny and ARCA rail. This Prusament PA11 is really tough. Even better is the special heat bed plate that REALLY holds onto the prints during printing- a real issue with PA/Nylon materials.

The nice thing about these small parts is they print fairly easily and fast.

Really liking the rifle, going to get it out and break in the barrel and get a zero on it this weekend.