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SIG MCX Spear LT general impressions

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7.5K views 10 replies 5 participants last post by  M-Peltier  
#1 ·
I waited a year for this. Its finally hear to reside with my AR15 collection. I did a lot of reading up on it, so my hopes were high and my expectations were low. SIG always manages to generate controversy and roll out products that are............not quite ready. This is their 3rd generation of the MCX, so I was hoping they had it figured out. Then I read about hand guard shift and barrel movement. It had me a little worried, and it was the first thing I checked. I was very relieved to find mine was tight and straight. These are just some initial observations. I will try to update with a range report.

Complaints:
Plastic Forward assist/shell deflector housing.
Trigger kinda sucks. Has the same rolling feel that my 556 has.
Off side bolt release is a tiny lever. It does not exude confidance. It may be robust, but does not feel like it.
Factory skeleton stock is wayyyyy to short. First thing I replaced.
Tapered barrel at threads. SIG sells a taper cap to use standard muzzle devices. $12.00 plus shipping.
On line owners manual. That will come in real handy if im shooting in an area with no cell service. Which is often. Yes, I read them occasionally.

Compliments:
Handguard is solid and comfortable
Folding stock.
Top rail length
Gas piston
Uses AR15 triggers, Stocks, Grips

I ordered the Collapsible stock from SIG. They sure are proud of them, but it looks and works great. Also added MBUS gen 3 back up sights and a Trijicon MRO. The little handstop is from Arisaka. As soon as I have time to modify my BEVBLOCK to fit the barrel extension, I have a Hypertap muzzle break for the end of the barrel.

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#5 ·
Congrats on the new toy. However I don’t understand your criticism of the trigger pull. You bought a service rifle, not a competition rifle or a precision rifle.

I’m no fan of American SIG products but some of these criticisms are rather baffling. Yes, it’s expensive. Yet at the same time it’s a service rifle.
 
#6 ·
Congrats on the new toy. However I don’t understand your criticism of the trigger pull. You bought a service rifle, not a competition rifle or a precision rifle.

I’m no fan of American SIG products but some of these criticisms are rather baffling. Yes, it’s expensive. Yet at the same time it’s a service rifle.
Well, since you mentioned it, it is expensive. This is why I have levied certain criticisms I guess. They shouldn't be baffling.

I have many less expensive "service rifles" as you called them, that have far better triggers from the factory. Giessele, LaRue, Daniel Defense, BCM (KAC trigger), Wilson, Even my Colt LE6920 has what I would prefer in a trigger. The Colt is just a traditional AR15 trigger, and is not the best of the "service rifle" triggers, but is better in my opinion than the SIG. None of them are competition or precision rifle triggers. I have AR Gold and Triggertech triggers that fall in to that category. I wasn't expecting that level in the SIG. At the price point though, I was hoping to not need to spend more $$ on the trigger. At least I can if I decide too.

A stock that's 3" too short or a major component, that is metal on most others (Including the full size Spear M7 adopted by the US Military), that is plastic did not meet my expectations. These things are big enough changes, in my opinion SIG should have called it something else besides Spear. Its a Gen 3 MCX.

In spite of my criticisms I like the Spear LT. I think SIG could have done better, but they never asked me. Lol

And yeah, at 7.5 lbs it falls right in between all the Service rifle type rifles I have. a few ounces either way. Its a total non issue.
 
#11 ·
Well, I finally got the Bevblock modified. That was kind of a pain. Once I got the proper clearances on the lugs, it fit in the barrel perfectly and the factory muzzle device came right off. It took a bit of pressure but did not have any Rock Set or adhesive of any kind. SIG's taper cap works, but does not fit as precisely as it could. It leaves a bit of the taper exposed, in this day and age of CNC machinery the mismatch between these parts should not exist. SIG QC on display at its finest.

The Triggertech trigger on the other hand went in without a hitch and is, as I expected, incredible. I went with the Triggertech MCX trigger for two reasons. One is I have one in another rifle and its superb, so I knew what it would be like. Second is they designed it specifically for the MCX, which is known to be hard on triggers.

Now to put it through its paces side by side with my Gieselle Super Duty to see which one I like better.

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