new AR lower

[SFgiants105]

Just picked up my new lower today. Yankee Hill YHM-125. Have never built an AR before.









My intended build:

Adams Arms 16" carbine-length upper

https://www.rainierarms.com/?page=shop/detail&product_id=1890

Samson Evolution 7" handguard

http://www.samson-mfg.com/ar-15_html/product/Evolution-7.html

POF Roller cam pin

https://www.rainierarms.com/?page=shop/detail&product_id=1898

POF anti tilt buffer tube

https://www.rainierarms.com/?page=shop/detail&product_id=3493

ALG Advanced Combat Trigger

http://www.rainierarms.com/?page=shop/detail&product_id=3022

AAC Shorty brake

https://www.rainierarms.com/?page=shop/detail&product_id=2744

Tubb Precision buffer spring

http://www.davidtubb.com/ar-15-buffer-spring-fits-both-carbine-and-std

Spikes S2-T2 buffer

http://www.bravocompanyusa.com/ST-T2-Heavy-Buffer-by-Spikes-Tactical-p/st-t2.htm

CMMG LPK

http://www.amazon.com/CMMG-Lower-Parts-Without-Control/dp/B00ERGQKFW/ref=sr_1_5?ie=UTF8&qid=1381886279&sr=8-5&keywords=cmmg+parts+kit

Hogue grip

http://www.amazon.com/Hogue-Rubber-Beavertail-Finger-Grooves/dp/B007LUUIAO/ref=sr_1_2?ie=UTF8&qid=1381886338&sr=8-2&keywords=hogue+ar15+grip

Magpul CTR

http://www.amazon.com/Magpul-CTR-Carbine-Mil-Spec-Buttstock/dp/B00305K99Y/ref=sr_1_2?ie=UTF8&qid=1381886486&sr=8-2&keywords=magpul+ctr

[Bravodigger]

You'll end up with a top shelf build, but you probably already know that.

[Germz]

That advanced combat trigger for all the....advanced combat in the streets of Frisco...

just giving you a hard time. Have fun building and post pics of your endstate!

[tacticalcity]

Sounds like you've done your homework. Should be a nice build.

[jasonnorcal]

Ok 1st build, my advice. Don't bother with the POF/S crap or the fancy buffer and spring. Magpul, alg, and hogue is all good. I would not get that upper mostly because it limits what handguard you can run. You'll want atleast a 11" handguard eventually.

[Arkangel]

Good luck on the project. Let us know how she runs.

[triggs75]

Looks great and yeah you have done your homework.

You thought of a mid-length instead of carbine length? That would be my only question on the build. Mid length will give you more rail space. I prefer more rail space cause I'm a little taller then the norm and my grip goes pretty far out there. With the carbine I feel scrunched up.

But that is me. Not sure if you have held both and felt the difference

Since it's a piston upper it's tougher to change out handguards, can't just through a low profile gas block then a longer handguard.

Again gonna be a great build how you have it.

[SFgiants105]

Since it's a piston upper it's tougher to change out handguards, can't just through a low profile gas block then a longer handguard.

Again gonna be a great build how you have it.

I'm only 5'9," so I don't mind the length. I don't need a whole lot of rail space, either.

I just want a light, free-floated hand guard that can accommodate a small rail on the bottom for a vfg and a side rail for a light.

The way I see it, a carbine length system will make it lighter in the front, and make the rifle balance better overall.

[Fherot]

Edit: didn't notice you were going piston not gas.

What steel does Adam use in their barrels?


I think you picked conservatively and wisely with your build. I'm torn between simple A2 front post and Magpul handguards or go for low profile gas block and a Centurion CMR. I like FF rails like that Samson that aren't quad-TACTICAL-blaster rails to attach 3 lasers to.

Good choice buying POF buffer tube personally. If you're going to build your lower you're supposed to hand pick each and every part to your exact taste.

[jasonnorcal]

I'm only 5'9," so I don't mind the length. I don't need a whole lot of rail space, either.

I just want a light, free-floated hand guard that can accommodate a small rail on the bottom for a vfg and a side rail for a light.

The way I see it, a carbine length system will make it lighter in the front, and make the rifle balance better overall.

If your concerned about weight maybe you should look at a DI upper. A 14.5, DI, carbine gas system upper with a pencil barrel will be very light and quick handling.

[audiopro74]

Nice, and nice choice on parts. I just picked up 2 more aero precisions. Got a full kit coming for one, just to make it a plinker, and going to build the second in. 7.62x39. That one will get all hand picked parts.

[SFgiants105]

Update (10/25):

Just ordered all the parts for the lower, with the exception of the Spikes buffer. Here is what is coming for now:

CMMG LPK
Magpul aluminum trigger guard
Rogers Super Stoc
ALG AC trigger
KNS MOD2 anti-walk pins
Tubb buffer spring
POF anti-tilt buffer tube
Noveske QD end plate
Rainier Arms castle nut
Falcon Industries Ergo grip

also on the way:
NcStar AR-15 armorer's tool
POF roller cam pin
Wilson Combat extended charging handle latch
9-piece punch set
gunsmith mallet

will post pics soon

[Gruber51]

You found parts on your first AR that I didn't discover until my 3rd home build and ended up going back and replacing on the first two. Congrats.