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View Full Version : LMT, KAC & DD Build (First one after 13+yrs of being on here)



bryan1211
07-24-22, 19:06
Hey M4C. First made my account almost 13 years ago... Went back and forth on AR's vs. AK's and ended up going with AK's. Still always knew I'd end up getting an AR eventually. With that said, my dad picked up a KAC SR-15 Mod 2 last year, so that made a great excuse to finally get one.

Build Details:
Back when I was doing research in the late 00's LMT and KAC were high on the list. Also, from being on here Daniel Defense and BCM jumped on the radar as well. KAC and LMT factory rifles have been kind of hard to get, so I decided to piece together a build.

Ended up selecting a LMT Mars-L stripped lower to start out the assembly. From there I wanted a LMT 13.25" Monolithic upper, but they've been unavailable until very recently. Decided I was just going to go with a standard upper and had a DD RIS II rail picked out. I then noticed some places had the KAC URX 3.1 13.5" rails back in-stock and ended up going that route. After that the build was "loosely" based off a URG-I build, but LMT instead of Colt and KAC instead of Geissele.

Ultimately decided to go with a DD 16" Mid Gov barrel vs. a p&w 14.5" one. Upper was sent off to D.Wilson for URX 3.1 assembly and the Centurion Arms gas block was taper pinned and double dimpled for set screws (highly recommend D.Wilson's services). For now I will be using the LMT A2 F/H until I decide on going suppressed. I also went with a ALG ACT trigger and may end up upgrading to a SSA in the future. Went with DD fixed sights and I will likely pick up an EOTech, or PA 1x Microprism (would go Aimpoint, but I have some astigmatism). Will also upgrade the Polytac LED light and Fenix mount for a Surefire M600U w/ DS-SR07.

Upper:
LMT Upper (L7D1A)
LMT F/A BCG (L7D3)
LMT Mid Length Gas Tube
LMT 5.56 Birdcage F/H w/ Crush Washer
KAC URX 3.1 13.5"
KAC URX 3.1 Panel Kit
KAC Charging Handle (Non-Ambi)
Daniel Defense Fixed Sights
Daniel Defense 16" Mid-Length GOV Barrel
Centurion Arms Gas Block (Taper Pinned & Double Dimpled for Set Screws)

Lower:
LMT MARS-L Stripped Lower w/ Ambi Safety
LMT LPK
LMT 5.56 Buffer Tube (LMP259A)
LMT Buffer Spring
LMT H Buffer
KAC End Plate (24103-1)
KAC Factory Modified Trigger Guard
ALG ACT Trigger
BCM Mod 0 Grip
B5 Bravo Stock OD

Pics:
https://i.imgur.com/s4z7EP7.jpeg
https://i.imgur.com/EbVeJUz.jpeg
https://i.imgur.com/DmtOsAO.jpeg
https://i.imgur.com/heiQZnj.jpeg

Thanks for looking!

Hammer_Man
07-27-22, 17:20
Looks good!

bryan1211
07-27-22, 18:09
Looks good!Thanks man!

Went and zero'd it yesterday without any issues. It seemed to be extremely smooth and not over gassed.

titsonritz
07-28-22, 21:58
I always liked those KAC URX 3.1 handguards. Nice carbine.

Waylander
07-29-22, 17:23
That’s a solid build.

bryan1211
07-29-22, 22:44
Nice carbine.

That’s a solid build.
Thank you both!


I always liked those KAC URX 3.1 handguards.
They've really grown on me in the past couple of years (traditionally a big quad rail fan). I hope KAC keeps producing them in the future.