SIG MCX: When is an AR not an AR?

[czgunner]

Where are people finding the Taper Cap adapter? My google-fu isn't yielding many results.

I called Sig and they sent me one for free. The guy told me the rifle should have shipped with one. Only bad thing, it took 2 weeks to get it.

[Sensei]

If you look a couple pages back I was having the same issue. Thought my gun was a lemon. Took it to the range with several types of ammo, a buddy I know can shoot well and a magnified optic. This is what I found shooting rested off a pack between two shooters at 100 yards:

55g American Eagle XM193: terrible groups, like 5-6" if not more. Similar to what happened at my last outing.

75g .223 Hornady BTHP: accurate groupings around 1.25" to 1.5"

77g IMI mk262 clone: also very accurate with about 1.25" to 1.5"

55g .223 Hornady GMX: much better than the XM193 but not as good as the heavy weight stuff. Around 2". Ran out of time and only shot one 5 round group of this and my buddy who shot it said he didn't like any of his trigger pulls so this round could possibly shoot better than we saw.

Unfortunately we ran out of time as I had a few more types of ammo to try. I think the gun may be capable of even better groups with the heavy pills. I am certainly no crack shot and my buddy was having trouble adjusting to the trigger, but we both would be able to get touching holes with the heavy stuff only to throw the group with a bad pull and the optic we were using had a thick reticle not suited for trying to wring every last bit of accuracy out of the gun.

There are 1:7 twist barrels in every platform that do not like 55 grain ammo. You appear to have one in your MCX. Having said that, your results with heavier loads is excellent and on par with what I'd expect.

I'd hoped to run my MCX hot to see if the groups open up like other have reported. Unfortunately, my problems with a new Steyr AUG have dominated my resources, but I'll eventually get around to it.

[krm375]

Any updates on the MCX? Was hoping this would be a good weapon for a 300BLK pistol/SBR but I am still on the fence.

[Wake27]

Anyone know anything about the 7.62x39 version?


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[VIP3R 237]

What kind of key mod rail covers are you guys using? The gas vent on the gas block vents right into my hand (I'm left handed) and it's distracting.

[Sensei]

What kind of key mod rail covers are you guys using? The gas vent on the gas block vents right into my hand (I'm left handed) and it's distracting.

Bravo Company

[interfan]

What kind of key mod rail covers are you guys using? The gas vent on the gas block vents right into my hand (I'm left handed) and it's distracting.

Knights

[Tokarev]

The Gen1 gas system didn't vent out like the Gen2. At least not that I can remember.

[Tokarev]

Hmmm....

https://youtu.be/86DpZ1dsc3c

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[Mrgunsngear]

Hmmm....

https://youtu.be/86DpZ1dsc3c

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