The American Defense UIC true ambi lower is a fine basis for a quality AR build

[caporider]

Now that AXTS is unwilling to sell just their lower receivers, it seems to me that the American Defense UIC full ambi lowers are a pretty good choice (they even look like the AXTS lowers -- LOL). The Duty-Series units like the one shown here are IMHO a decent deal at $240 with all ambi controls and takedown pins either installed or included.

If you haven't seen these UIC lowers before, they include an ambi bolt catch AND release and left-side mag catch actuator (which works in conjuction with standard mag catch parts to make the mag catch ambi). The bolt catch/release assembly is proprietary, with the left side paddle having a small "tail" that interfaces with the right side lever. The safety can also be ambi if you use something like the BAD-ASS. You have to provide the FCG, safety with detent pin and spring, standard mag catch parts, buffer pin and spring, receiver extension, endplate, castle nut, stock body, and pistol grip.

The magwell has a nice hidden bevel to speed mag changes. ADM also includes a threaded post with a polymer tip that you can adjust to make your upper/lower fit tight, but I find these sorts of things a waste of time so I just left it off the lower.

Looks very nice and works perfectly so far. I can't detect anything that would have put this lower into the "Duty-Series" category, which is supposed to include minor finish issues and other nonesuch.

Here are some shots of my "stripped" lower as it comes from ADM.



Here is the completed rifle.


I'm using a standard forged flattop upper with a Centurion Arms 16" 5.56 tapered bore LW barrel, DD Slim 15 KeyMod handguard, Griffin M4SD II flash comp, TA11D ACOG, and offset Micro T-1. The FCG is standard USGI and you can see the BAD-ASS ambi safety.

I find the ambi controls very well thought out and easy to use. The right-side bolt catch/release in particular is awesome. There were no tolerance issues with any of the standard LPK parts I used. All the PMAGs I've tried so far drop free (M3 30, M2 30, M3 20).

I put 25 rounds through this rifle during a brief range visit last week and experienced zero issues. So far, the UIC lower is shaping up to be a very nice option for shooters who want a true ambi lower with an ambi bolt catch/release vs just a right-side bolt release.

I will update as I put more rounds downrange.

[Spring-Diver]

Very nice!!! What's the weight on that lower?

Cheers
Shannon

[caporider]

Very nice!!! What's the weight on that lower?

Cheers
Shannon

It's definitely an easy rifle to shoot...

As for the lower's weight, I actually have no idea. If I had to guess, it might be an ounce heavier than a standard forged lower. It certainly doesn't add anywhere near as much weight as the optics stack or the SOPMOD buttstock.

[Jaysop]

Nice. Mine will be here Monday

[ADM]

Very nice!!! What's the weight on that lower?

Cheers
Shannon

Weight of the Stripped lower with Ambi components is 11 oz.

[mngo888]

From another forum I heard that someone received an upper from ADM that had pretty bad machining marks on it. He was taken care of but I kinda want it done right the first time. How is the overall machining of the lower? Did it have machining marks on it?

[caporider]

From another forum I heard that someone received an upper from ADM that had pretty bad machining marks on it. He was taken care of but I kinda want it done right the first time. How is the overall machining of the lower? Did it have machining marks on it?

To be fair, I have the "duty grade" UIC lower, which is less expensive because ADM considers them to have cosmetic flaws. However, I am looking at the lower right now and can find no machining marks, odd anodizing, or any other issues... Frankly, it looks great.

[minnesoda]

Messaged you about the lower caporider

[bzdog]

Can you compare the feature set and user interface to the AXTS AX556?

Thanks,

-john


Sent from my iPad using Tapatalk

[Jaysop]

There's a lever on the right side that goes up and down that locks and drops the bolt. The AXTS has a release on the right side and the bolt locks back by pressing the mag release.