At this point in my life, it takes a lot of convincing to add another system to my inventory (larger than most and my life is super busy and I can’t enjoy them all)

I already own several 300 blk ar15 style systems, including a pistol version.

I really love  my 10.5” 300 blk pistol and the sb tactical “brace”.

sig 516 above in FDE and 300 blk pistol suppressed below (black)

I’ve had the bug for a MCX for a long time. I’ve owned the sig556 (heavy…ak like). My main ar “go to war” system is a sig516. But, I felt I needed a 300 blk “pistol” that wasn’t as long as my sig516 with the can on it.

I almost made a mistake and bought the Sig mcx rattler canebrake. Last minute I found out the other MCX barrels will NOT fit the rattler nor canebrake.

Comparing the canebrake with the tachops.

Item 5.56 barrelOALB-LengthlbsMSRPColorTwist
CanebrakeNO29.255.56.52900FDE1:5
Tacopsyes27.506.7582719BLK1:5

Key take-aways: the mcx tacops 2” longer, cheaper and heavier than the canebrake.

https://www.sigsauer.com/store/sig-mcx-canebrake.html

mcx rattler canebrake
MCX tacops

https://www.sigsauer.com/store/sig-mcx-virtus-tacops.html

My fav color would be grey, that is not available.

Checkout nutnfancy’s review:

My favorite reddot is the holosun 515c (it has solar and auto adjust for the lighting, turns on/off automatically. has a battery backup.

Like most sigs, gen1 has a bug or two. So it is with the mcx. Thanks nutnfancy for getting that fixed.

What are some general thumbs down for legal implications with “rifle pistols”?

Q: can you put tape on the brace?
A: I don’t think so. what do you think?

Q: Can you put a 16″ barrel on a rifle pistol?
A: I think so. You get in trouble putting a shorter than 16″ barrel on a rifle, but putting a longer than 16″ barrel on a pistol seems ok. What do you think?

Q: Can you shoulder a rifle pistol brace?
A: I think it depends and changes frequently. Best to put it on your chest

Q: Can you put a vertical grip on a rifle pistol?
A: I don’t think so, as that is a rifle feature.

Q: Can you put a rifle stock on a rifle pistol?
A: Only after you get an NFA tax stamp

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