Assembled my first AR Lower

[SuperChuck]

Always knew it was not going to be too difficult, but always procrastinated giving it a whirl.

Finally bought 2 custom lowers with my Gun Trust information engraved into the receivers prior to the anodizing, so figured I'd better test fit and function before spending $200 each to get them designated as SBR Lowers..

First one I put together yesterday. As I mentioned, this is a custom Billet receiver that eliminates ALL roll pins. The trigger guard is machined into the design, eliminating 1 roll pin, the bolt release pivot pin is actually an allen-head threaded pin that replaces the roll pin. That eliminates any chances of leaving a mark on the receiver when driving the roll pins home.. Added a Rock River take off collapsing stock to completely assemble and test fit to my shoulder... so far, its feeling quite tiny.. just right for my 4" barrel 22 caliber upper.

My only additional effort was cleaning out the blind hole for the pivot pin retainer spring hole. I just chased it with a small diameter screw to clear out the salts from the anodizing process, I assume thats what the powdery substance was.

The other features, 300 BLK caliber marking and 300-based serial numbers.. (I got 0002 and 0003 consecutive Ser#'s - it was a limited run )

 

[Dave29461]

They look great Chuck. Are they heavier than other AR lowers of not so elevated pedigree? They look like more material was left in the sidewalls and the lighting cuts don't look as severe.

 

[SuperChuck]

I have a DoubleStar lower. There's a few places where I see some beefier wall thicknesses, or bosses and reinforcements are more squared, with less radiusing to lighten those areas. In-hand, they feel approximately the same weight, I'd think that any difference is negligibleat most an ounce or two.

The front of the magwell is grooved for better grip, but thats common on other brands too.. It does have an adjustable allen head bolt in the pistol grip area, to tighten up the upper and lower interface, as well..

After watching the videos and all the risk with setting up the roll pins, I liked the idea of eliminating the roll pins, as well as the customized ser# and Trust engraving..

Now I need to get some more LPK's, maybe one with a 2-stage trigger..

SC

 

[Dave29461]

If my ship ever comes in without running aground, I want to put a Geissele Super Semi Automatic Trigger in my 308 lower. I'd like a less costly two stage for the 5.56's. I like the idea of the tensioner screw for the upper/lower interface, as well as the integral trigger guard. Looks like they should build up to great weapons.

 

[Clicker]

Another example of why these are the "good old days" for black rifle fans. Innovative new designs and ideas seem to appear every month.
Nice SC, very nice, have you decided on a stock for the second lower?

 

[thebrasilian]

It's easy to get hooked. I'm Already working building my second. My first one is a 300 as well.

 

[SuperChuck]

I've got a couple of options, but I definitely know what I don't like... rattle-prone collapsing stocks, or anything too loose feeling.

I'm liking the Magpul stuff up to the UBR- but that might be a little rich for now.. I like the collapsing stock shown in the photo, if I can get another one reasonable, I'll probably do so..

Another direction I might take is to look at the Ace skeletonized stocks and get as short a fixed mount as possible, or something comparable.. For my 22 build, I might steal the idea I heard at shootzenfest and use a folder-style, although short and fixed mount aren't all that bad either. Aside from trying to keep the 22 SBR balanced with the can installed, I'll shoot for as light as possible for that one..(no buffer, spring, etc, etc...).

Luckily, the US Government is going to give me 6+ months to decide while the SBR stamps process.. So my mood and tastes are subject to multiple changes in the interim..

Regards,

SC

Another example of why these are the "good old days" for black rifle fans. Innovative new designs and ideas seem to appear every month.
Nice SC, very nice, have you decided on a stock for the second lower?