COMPLETED: My Sub-5lb lightweight AR build. Final weight: 79.2 ounces with sight!!

[joefrank64k]

No sure, it's getting a pencil barrel.. I would throw the barre that's on the OIP but I can't find it anywhere

That barrel was made by Faxon, under license from Knights Armament. I'm not sure if it's available as a separate purchase.

You might reach out to Bentwood Gunsmithing to see if it's been (or will be) made available as a separate purchase.

[GOLDEN GUN]

That barrel was made by Faxon, under license from Knights Armament. I'm not sure if it's available as a separate purchase.

You might reach out to Bentwood Gunsmithing to see if it's been (or will be) made available as a separate purchase.

Called, they won't sell anything individually and won't sell their rifles anymore to the public

[GOLDEN GUN]

DELIVERY ALERT!!!

Milspec barrel nut came in and was .1 ounces lighter than I originally anticipated coming in at a confirmed weight of 1.2 ounces...

That makes me happy...

Tracking says stock will be here around 3pm when the normal mail comes in

[GOLDEN GUN]

DELIVERY ALERT!!!

Stock came on.. Weighs .5 ounces more than it said online... For a total of 6 ounces

Total current weight : 3 pounds 3 ounces ( 51 ounces)

Remaining parts :

Bcg - 8.5 ounces

Barrel - 17.4 ounces

Muzzle brake - 1.8 ounces

Gas block - 1.5

Gas tube - .9

For a total project weight with sight : 81.1 ounces!?!?!

I need to drop it by 1.1 ounces

[MarkG35]

Great points....and I understand the whole "that's why it's great we all get to make our own choices" bit...but truly light costs $$.

My OIP carbine has all sorts of niche lightweight bits. The barrel is dimpled, the MB is Ti, the non-adjustable Ti gas block is almost non-existent, etc, etc.

It's a balanced system too...this is the softest shooting AR I own. But that's why I paid the $$.

OP, looking forward to your complete build and range report!!

BADASS!
Too much for me though!

[Kmai24]

Dammit!! Do some squats or push ups, getting silly with all this light weight stuff!! Hahahah just kidding OP!! Awesome build, can't imagine how light it is to swing that stick around??

[GOLDEN GUN]

getting it cerakoted tomorrow

[smokeyfs]

getting it cerakoted tomorrow

Isn't cerakoting going to add weight to the rifle. Just curious

[dyson]

ya might gain an oz's with cerakote?

[missiontrails]

Let's forget about dirt getting into that upper.... but more importantly, how will it even hold lube? Unless you're using Froglube (which I can't stand), normal lube is just going to run out all over the place. So much for running it wet. Was just on F1's website, and they consider the milled out sides of the upper a "unnecessary surface".... okayyyyyy...

[FeuerFrei]

Totally impractical and illogical. I like it!

Now ditch the muzzle fob, switch to pistol hand guard and drill lightening holes in the receiver extension and give it to the chico psa rifle guy for testing.

*Why doesn't someone build the heaviest AR15 clone? 20lbs minimum to qualify.
Sorry. Just trying to get ahead of the next fad AR15 clone assembly curve.
Carry on.

[GOLDEN GUN]

Well I thought about it and these are my suspicions so far

My lightweight Bcg is polished nickel boron - minimal lube needed

The lightweight bcg has minimal surface area - minimal lube needed

And there is no evidence of anyone online who owns one complains about any issues with an f1 upper so for some reason I think it'll be ok...

As for cerakoted adding weight.. I hope it's minimal.. As I understand cerakoted is so thin that it shouldn't produce any additional noticeable weight.. But wel see

[Merc1138]

*Why doesn't someone build the heaviest AR15 clone? 20lbs minimum to qualify.
Sorry. Just trying to get ahead of the next fad AR15 clone assembly curve.
Carry on.

CMP service rifles don't have a weight limit... although I don't think many are actually adding enough to make it 20+ pounds.

[GOLDEN GUN]

Delivery alert!!!

Bcg came in at 8.5 ounces as advertised

Gas block came in at 1.5 ounces

Cerakoted design should come out awesome! They will have the parts for about a week..

All parts purchased except muzzle brake.. Stay tuned for final product coming soon

[Bishop98]

Sorry if I missed it but who's doing your coating?