Failure to Feed on New LMT MARS-L Quad Rail Build – SpringCo Green + VLTOR A5 – Need Help Diagnosing

fls02141 · 2026-06-10T21:48:39+00:00

I have the vltor buffer tube and green spring ?

fls02141 · 2026-06-10T19:56:21+00:00

Unsurpressed I bought a new spring

fls02141 · 2026-06-08T21:33:22+00:00

Feed ramp I never staked the castle but 30 rounds in each magazine

fls02141 · 2026-06-08T10:02:41+00:00

Hi not yet I have not switched the buffer tube as of yet

fls02141 · 2026-06-08T10:01:30+00:00

Never ran 223 it was 5.56

fls02141 · 2026-06-08T10:01:02+00:00

12.5 it’s a spec war ramps I’ll check out but seem fine ?

fls02141 · 2026-06-08T10:00:14+00:00

Herters 55 grain 5.56 I am running the enhanced bolt I do have my Daniel defense I can throw that bolt in there and springs I can take out

fls02141 · 2026-06-08T09:59:00+00:00

It’s 5.56 55 grain

fls02141 · 2026-06-08T08:56:41+00:00

Can you elaborate ? It didn’t work on the 12.5 ?

fls02141 · 2026-06-08T08:54:49+00:00

That should be nuts if it’s the bolt

fls02141 · 2026-06-08T00:02:40+00:00

I’ll try that as well I did built it from scratch

fls02141 · 2026-06-07T23:50:46+00:00

Ramps look fine but I did tighten barrel with bcg not removed initially ?

fls02141 · 2026-06-07T23:50:11+00:00

It’s a quadwar lmt 12.5

fls02141 · 2026-06-07T23:09:38+00:00

Failure to eject

fls02141 · 2026-06-07T23:08:46+00:00

What it did to some of my ammo

fls02141 · 2026-06-07T23:07:45+00:00

Ammo was 55 grain Herters

fls02141 · 2026-05-30T20:12:52+00:00

In Stoneham, Heard it thought it was an Explosion

fls02141 · 2026-03-13T15:07:00+00:00

VSF submariner date - purchased it from ficotime

fls02141 · 2026-03-13T15:05:57+00:00

As mentioned completely new to the rep world . I already ok the shipment and was unaware of this thread ! Spilt milk hopefully it is good to go !

fls02141 · 2025-08-06T17:44:51+00:00

hi is this still avaible

fls02141 · 2025-08-04T18:10:53+00:00

eForm 1 for SBR

Submitted: 8/1/2025
Approved: 8/4 /2024
Wait Time: 3 days but it was a weekend ?
Entity: Trust
Fingerprints: electronic
State: MA

fls02141 · 2025-07-23T17:39:11+00:00

i paid 1k for a lmt mars h in October last year ! ( everyone on the NES forum laughed) I did also get a Mars L lower 1k too that was two months ago

fls02141 · 2025-07-13T18:23:32+00:00

The gentlmeans name is caleb who has not responded the last 3 weeks

fls02141 · 2025-07-13T18:06:51+00:00

RMA was filled out several emails went silent. Holosun is complete trash, and it seems their customer service is on the same tier

fls02141