New SBR build: MK416

Yeah, the name's a bit tongue in cheek, but this rifle is all business. About a year ago I had to make some financial cutbacks and that included selling my only non-NFA AR. Earlier this year, I decided having a MK18 SBR as my only AR wasn't a situation I wanted to stay in, and with the DD MK18 rail shortage, they started bringing stupid money, so I sold my upper and financed a non-NFA Colt OEM-based build (you can find it in this forum) centered around a Colt SOCOM barrel. Since then, I've really enjoyed shooting that rifle and found the SOCOM barrel to be excellent. Of course, having a registered SBR lower (Factory DD no less) just sitting in the safe began to create an itch. Right before 41F went into effect, I decided to sell my NFA Benelli M1 and used the proceeds to build another SBR upper. Initially I wanted to go with the reportedly excellent Sionics 11.5 and I was very interested in their Robar BCG. However, as time went on I decided to go 10.3 again to make a more handy suppressed package.

I chose to base the build around a Colt SOCOM barrel again for a few reasons:
1. I had good success with the one on my non-NFA build.
2. I could control the gas port by starting with the .063 on the Colt barrel and having it opened to .070.
3. The heavier profile should be better with the suppressor.

So I began to acquire parts. Here's the list:
Colt M4 upper receiver (6920 takeoff)
Colt BCG (6920 takeoff)
Colt charging handle (6920 takeoff)
Colt 14.5" SOCOM barrel, cut to 10.3" and gas port opened to .070 by ADCO
FSB chop and grind
Geissele MK4 9.5 in rail, mod 1, Sand color

Other accessories:
AAC M4-2000
AAC 51-T Flashhider mount
DD fixed front sight
MBUS Pro rear sight
Tan Surefire X300U
Aimpoint T1, 2MOA in Larue LT660, KAC battery cover/storage, Kickstarter OG IO cover.

Compared to my MK18, the Geissele rail is lighter and has integral sling QD's for more weight savings.

Future plans include changing the stock to a Magpul CTR, grip to a Bravo, enhanced trigger guard, and a Geissele SD-E trigger. Got to save up some more money, though.

http://i854.photobucket.com/albums/a...AE0C045BDF.jpg
http://i854.photobucket.com/albums/a...36451C9909.jpg
http://i854.photobucket.com/albums/a...4242C630D2.jpg
http://i854.photobucket.com/albums/a...B169DD7B7A.jpg

I like it! Really like how you have the X300 mounted at 12 on the pic rail.

Ben

Very nice! I want to do similar but with a Knights URX 2.

Very nice. Cool story how it came to be as well. I don't know if you've ever used the Geissele SD-E but it's an awesome trigger and will go great in that gun. I use them in all my builds and love them. Enjoy it and hope you're able to finish it up soon.

Swapped the Aimpoint T1 out for an M2. Put a Sopmod stock on. I like it.

http://i854.photobucket.com/albums/a...59A46F96EF.jpg

That G rail looks awesome