LMT Mars-L Lower, LMT 9.25" MRP upper, LMT 10.5" 300BLK Barrel, Geissele SSA-E (3.5lb), magpul furniture, EOTECH G43/EXPS3, Vltor A5 buffer, Radian Raptor Charging Handle, Bootleg adjustable BCG, Sandman-X can., POS Hexmag (need to swap this out)
This is my first post to this community. I didn't realize the community was here... but generally speaking, Lemmy needs more posts, so I'm putting this here in an attempt to do my part.
Last year, I was thinking about upgrading my Ruger 8515 to something a bit higher end and ultimately decided it would be better to build one from the ground up... did a lot of research, saved a lot of money, waited a lot of months and came out with this thing. Got the Form 1 stamp back yesterday.
It's pretty nice, but it's a slight bit heavy for an SBR @ 10lbs (loaded and with the can). I like it though. It's more difficult to shoot than the 8515, but I've only taken it out once so far (last night), so I still have some "getting used to it." There's also a light and an extension for said light on the way here now, so by this weekend I think it'll be "done done."
It's completely solid w/o the can using 150gr Federal. Once I put the can on it and switched to subsonic ammo (Hornady Black 208gr), I had failure to feed after the first round. My assumption is that my buffer weight is too heavy (currently on A5H2 that came with the Vltor kit) so I have an A5H0 on the way here now. Fingers crossed I'm right. It's whisper quiet, and if I can get it consistent, I'll be in love with this thing.
I only have a handful of friends that are into this hobby, and I don't want to send them pictures or let them know it's done. I'd rather whip it out as a surprise at the next range day.
With the BCG as the adjustment method for putting a can on, what do you think? I'm used to adjustable gasblocks, though I suppose for your handguard setup the BCG is more accessible.
I need to get back to you on this, probably late Sunday/ sometime Monday. I just got the A5H0 buffer yesterday, and won't have an opportunity to test until Sunday.
My initial thoughts from the first time I took it out were that the adjustable BCG wasn't doing shit, and a mid level of disappointment.
I went with the adjustable BCG because this is the MRP and the gasblock is attached to each barrel and cannot be adjusted. That's part of why I went with the handguard setup I have, since it's not going to impact it either way and it feels great. I want to be able to swap out my barrel for 5.56 (next time there's a sale at LMT). Going to go 14.5" on the 5.56 but priority is 300 BLK @ 10.5". I'll keep the A5H2 and A5H0 in the case and just switch out the buffer weight if I change caliber.
Plan is legit dual caliber and my case has a spot for the torque wrench and barrel swap. My first rifle was a Ruger 8515 and I have a ton of mags for that already. That's also why this build I went with FDE. I want my FDE to = 300BLK, and black mag = 5.56. Black electrical tape on the subsonic rounds of 300blk, and green painters tape on my armor piercing 5.56.
What (if anything) is the goal of the setup in terms of driving choices like barrel, optics, handguard, accessories?
end goal is home defense and flexibility - the whole LMT MRP setup will allow for me to swap out to 5.56 and use all of this other ammo that I already own.
Optics - astigmatism primarily drove that choice, but also some preexisting familiarity.
Handgrip choice came from stock preference... I like the B5 E-SOPMOD on my 16.1" but I can't put that on an A5 buffer system and have it actually retract all the way. It ends up sticking out like 1/4-1/2" and I hate that. I'm a nerd and I want things to fit perfectly. I went with the A5 buffer to reduce recoil. That being the case, I didn't have a lot of options with the A5 buffer and the Magpul STR was one of the two options that I could find that actually fully retracted on the A5 buffer. Once the stock was figured out, I wanted the rest of the furniture to match.
The light is a M640V which works really well with the EXPS3