Field Strip: Sig Sauer MCX Virtus (w/ Bolt Carrier, Recoil Spring and Piston Removal)

In this field strip video I disassemble and reassemble the Sig Sauer MCX Virtus rifle chambered in 5.56. This rifle, while similar to an AR-15, does come apart differently in a few ways and has a few extra parts. I hope this helps someone in the future who may need some assistance taking this rifle apart for maintenance and cleaning.
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[@joerotella1939]

Outstanding video with attention to detail and the challenges at different stages of re-assembly. Thank you!

[@thetexasgunvault]

You are very welcome!

[@Jlb-fz7nl]

Thank you for the great and detailed explanation on this firearm. It’s been a long while since I had this firearm apart and I needed help to clean it properly

[@thetexasgunvault]

I am so glad I was able to help. This is why I enjoy making these videos for people.

[@obesalahuddin9195]

Great video! I have the save version and recently ordered the 12" handguard. Your video made changing out far simpler than I had expected. Thank you!

[@thetexasgunvault]

I am so glad I helped! That is why I like making these videos.

[@johnhansen8272]

The bolt assembly terrifies me every time because I always think I won’t get it back together properly. Great rifle tho! Lol😅

[@thetexasgunvault]

It is a little over complicated

[@oohglenn]

I can assemble an AR in the dark. This thing is tough with the lights on. Practice I guess.

[@jamesa4958]

Thank you

[@thetexasgunvault]

You're welcome!

[@Casimyr78]

Great Video. Thx from Germany!

[@thetexasgunvault]

Thank you so much!

[@jcubetube3778]

Thanks for the video! I didn’t realize that is was different than my AR till I shot it and went to clean it…my first reaction was panic mode 😱😂

[@thetexasgunvault]

I am so glad the video helped!

[@combatvet1969]

That odd-shaped piece of metal stamped "S" is the Firing Pin Lock. When reassembling and you are attempting to connect the Op Rod Assembly [2 springs] to the Carrier, your method is SPOT on. If you try to reassemble these units according to the Sig MCX Virus Operator's Manual, you will end up pulling your hair out! MANY Thanks for your hard work in making this excellent video!

[@thetexasgunvault]

Great information! Thank you for taking the time to watch and comment. I really appreciate it a lot.

[@Gato303co]

Nice and clear explanation of the weapon parts, how they assemble and how it works, hard to find illustrative videos like this one. The only thing I may suggest is adding a light source above the gun, maybe above the camera, when you showed some close ups of inside the upper or lower receiver I could hardly see what was inside 😅

[@thetexasgunvault]

Thank you and you are right. I will try and do better next time. My filming situation is not always optimal.

[@julianc2789]

The handguard reminds me of the one on my NEMO 6mm ARC and the color looks similar to the Jesse James Cobalt Blue

[@thetexasgunvault]

I can see that too.

[@andrewsteele7663]

Good afternoon, Jason, keep pumping out the video's Cheers.

[@thetexasgunvault]

Will do!

[@Jlb-fz7nl]

Just got done and thank you again for sharing this. That last small pin is a little bit tricky

[@thetexasgunvault]

You are very welcome! I am glad it helped.

[@der_picard3370]

I own the german 16" Version. Most interesting for me, when it comes to cleanig, is, that since you Do Not have a conventional AR buffer tube (And instead a simple vertical picatinny with folding Stock assembly) , you can remove the stock easily.. and put the whole lower, (with All mechanics inside) , into a 10l ultrasonic cleaner (complete bolt and dual spring unit too)... And get perfectly cleaned interior devices, ready for lubricatiion, as result 👍😄

[@thetexasgunvault]

I never thought about that. But I am always wearying of putting anything aluminium in a sonic cleaners and putting water into any of my guns.

[@der_picard3370]

@@thetexasgunvault No Problem, when you use a good hairdryer or airpressure after cleaning...and two days drying in a normal heated room. after that I use a speciali ceramic lubricating spray for the bolt and firing pin area. Gives fine Flow due to coated surface and seals against corrosion. ...But without any grease-collecting oil content. Rest will get conventional Lubricating with good dosed gun spray. Works fine.

[@michaeltapp2325]

Great informative video! Subscribed!

[@thetexasgunvault]

Thank you!

[@GalaxyFilmz]

Great video man. Made me worried about cleaning it tho

[@thetexasgunvault]

Glad I could help

[@yosefmartinez9318]

I would like mine has same or different colors that black one sadly in the pandemic time was little difficult to get exactly what we was looking for

[@thetexasgunvault]

I am sorry to hear that.

[@masonsmith5069]

two marines in a room can break anything

[@thetexasgunvault]

That is what I hear.

[@garykappes4654]

Awesome!

[@thetexasgunvault]

Thank you!

[@whiskeyactual.]

The hammer looking piece is called a Firing Pin Lock.

[@thetexasgunvault]

Thank you for that information.

[@mrbenjiboy9527]

the unknown part is called firing pin safety/ firing pin catch

[@thetexasgunvault]

Thank you for that information!

[@Jpms-97]

I got a mcx rattler in 556, and it has major feeding/cycling issues. I took it apart and the only thing I noticed was the piston was extremely tight had to use a punch to remove/install it. Is that normal?

[@thetexasgunvault]

Maybe. I would clean it out and see if it runs better. If not, I would call Sig.

[@benzeneAndCordite]

How about the two small bolts to mount the handguard? What are the torque specs on those?

[@thetexasgunvault]

Not sure. I usually just tighten them to be snug. Never has an issue.

[@austincooks4u]

amazzing

[@thetexasgunvault]

Thank you.

[@barrymccaulkiner7092]

Which brand magazine is that? I just got a brand new mcx and the magazine is made of steel and doesn't say sig anywhere on it. The box was already open when I got it.

[@thetexasgunvault]

That one is just a Magpul.

[@robertrutkowski4802]

Hi thanks for this video. I buy today mcx virtus 223, I try to separate the flash hider, buy no idea which way do I turn. Could you help me. I try in one way after other way but it’s very tight and I’m afraid of damaging it. Thank you

[@thetexasgunvault]

You are welcome. They come off in the standard direction. However, do NOT use heat. They are taper locked. You are supposed to soak in water over night.

[@TaylorWilmes]

You don’t have to screw the hand guard in or anything?

[@thetexasgunvault]

Nope

[@raydelfa1125]

I'm afraid to take mine apart now....yikes

[@thetexasgunvault]

It is a lot to it.

[@jayr.1523]

I have the 16" virtus and i bought a 300 blackout barrel..is that all i need to convert it to 300?

[@thetexasgunvault]

That should be as they use the same bolt.

[@jayr.1523]

@@thetexasgunvault ok thx

[@tranportasimassal40]

Aku pikir akan sama dengan HK416 dan ternyata beda terutama di recoil spring nya

[@thetexasgunvault]

I am sorry I do not understand

[@tranportasimassal40]

@@thetexasgunvault I thought the way it works is the same as the HK416, but it's different, especially the recoil spring

[@austincooks4u]

Thats a lot of parts.

[@thetexasgunvault]

Yeah. They are complicated firearms.

[@austincooks4u]

@@thetexasgunvault swiss

[@saucywings]

Of course he didn’t show how to take the muzzle device off… 😔

[@thetexasgunvault]

Yeah, you know why? Because Sig uses a stupid taper lock on it and thread locker. They are tough to get off.

[@saucywings]

@@thetexasgunvault gonna be pulling mine off soon for a direct thread suppressor. I’ll soak it in hot water or something before I crank on it