New Vltor Billet uppers

**Aubrey** · 07-09-06, 09:57

Pics? Estimated date of availability?

VLTOR · 07-10-06, 13:11

The MUR (Modular Upper Receiver) and the VIS (Versatile Interface Structure) are both ideas I had back in the days of working at Knight’s Armament.

The MUR, with its modular Shell Deflector and Bolt Assist, is similar to an idea that I incorporated into a SR25 Match rifle. At that time, the SR25 didn’t have a shell deflector. The KAC engineering staff developed a couple of options and in the long run, KAC ended up with a bolt-on shell deflector, which mounted to the Picatinny Rail. Besides the shell deflector issue, the SR25 had another design flaw, the removal of dust cover door, which required the removal of the barrel nut. In other words, the dust cover door pivot shaft could not be removed rearward, which allows access of the door or related components.

For one of my SR25s, I prototyped a shell deflector that fits into a dovetail track, machined on the side of the upper receiver. Better yet, the shell deflector was held in by the dust cover pivot shaft, which can be removed rearward for easy repairs.

Over the years, I and many others have seen the good and bad points (mostly bad) of the conventional forged flattop upper receiver. Our goal was to develop an Upper receiver, with precise specifications, robust construction, eliminating chance of flexing.

The MUR is nothing more then an upper receiver with correct MilSpec dimensions. It’s not any tighter in spec then any other upper receiver; we just pride ourselves in making a receiver that is within milspec.

All MURs will be made of 7075T6 aluminum, hard coat anodized and with a dry film lube bore.

The MURs are offered in two configurations, one with a Bolt Assist and Shell Deflector and one with a Shell Deflector only. All MURs come standard with a dust cover door.

Currently we are finishing the first 400 units, with more on the way. Delivery of the first MURs will be within the coming day. We are trying to perfect the Dry Film Lube process. At this time it’s a loosing battle, but in the long run, we’ll win the war!

The retail price for the two options are as followed:

MUR with Bolt Assist and Shell Deflector is $229.95 (part number is MUR-1A)
MUR with Shell Deflector only is $199.95 (part number is MUR-1S)

Eric

**mtdawg169** · 07-10-06, 13:56

Eric,

First & foremost, thank you for taking the time to post & update us on the progress of the project. Thanks also for giving us some insight into the design & history surrounding the MUR & VIS. Personally, I think the thing is a work of art & cannot wait to get my hands on one.

It's not often that we have a chance to get information from the horse's mouth, which is why am glad we have a forum like this. Thanks again for the insight & taking the time to respond.... Now comes the waiting.

**Yojimbo** · 07-10-06, 14:32

Eric,

Thanks for the info!

I'm impressed that you guys went with 7075-T6! The MUR looks like a very high quality piece of art!

Now all you need is a matching lower...

**Impact** · 07-10-06, 14:36

very cool. Thanks for the info.

**CapnCrunch** · 07-10-06, 17:46

I've got a very special build planned with one of these

I'll post pics when it all comes together.

**Stickman** · 07-10-06, 18:43

1. Will these fit in a standard receiver block for mounting barrels, will alterations be required, or will it need an all new beast.

2. Thankyou for not making the price obscene, I know you could have, and you still would have sold them by the box.