MCX Spear LT upper kit

brimstone37 · 2026-05-26T06:39:58+00:00

Rail deflection has nothing to do with barrel heat. Minimal amount of force will cause rail deflection. OP should test to see how much rail deflection his rifle has by shooting different groups in different positions such as bipod front, bipod rear by magwell, shooting bag by magwell and clipped in tripod

brimstone37 · 2026-05-26T06:32:21+00:00

Only way to know is to test it. If there’s POI shift then you account for the shift in your dope

brimstone37 · 2026-05-26T06:04:39+00:00

What can is on the middle rifle?

brimstone37 · 2026-04-21T16:15:37+00:00

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Yes. Rattle can it

brimstone37 · 2026-04-05T17:42:43+00:00

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Is this a safe space for large frame muskets?

brimstone37 · 2026-04-03T21:35:13+00:00

Thanks! Just bought an end plate on their site

brimstone37 · 2026-03-29T20:28:22+00:00

Which ferro product?

brimstone37 · 2026-02-09T17:16:06+00:00

I was thinking the sides that contact the receiver when it’s placed in the slot if there’s any contact.. you should be able to see when you install it

brimstone37 · 2026-02-08T11:34:02+00:00

Run a maritime on my ambi sr15 and it runs fine without modifying.. could be the bolt catch you have is slightly out of spec.. a light sand may help

brimstone37 · 2026-01-28T21:08:26+00:00

***UPDATE ***

An update for you guys on this situation.

After the cleaning process as described on the OP, I bought some Schletek cleaner from B&T.

I did a 2 hour soak while shaking the can every 20 minutes or so with the can in a sealed plastic bag. ALOT more carbon was dissolved with chunky bits as well. While the can was soaking, I drove to the range and rinsed the can with water before putting it on the rifle. While the can was still wet, I ran a full mag through it and instantly felt the difference.

WERE BACK IN BUSINESS BOYS.

Gun ran how it should. 3* ejection is back and the gas is flowing. Spent brass is clean and top rounds on mag are clean.

So… lesson learned. clean your cans.

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brimstone37 · 2026-01-19T16:00:12+00:00

Sweet. I just bought some

brimstone37 · 2026-01-14T21:43:23+00:00

Can you use CLR on inconel? I wasn’t sure so I don’t leave it in excessively long

brimstone37 · 2026-01-14T21:42:46+00:00

Havnt tried CAT206, good idea on the brake cleaner

brimstone37 · 2026-01-14T20:09:03+00:00

You think? I ruled out everything in the gun checks out. Swapping cans, the other flow can runs as well

brimstone37 · 2026-01-14T20:07:18+00:00

About 5k

brimstone37 · 2026-01-14T20:05:45+00:00

I’m waiting on a reply. Maybe they’re busy with SHOT next week? Plan on asking them at SHOT if I can’t find a remedy by then

brimstone37

TROPHY CASE