Individuals in this very thread have gotten close to 1 MOA groups with MCX, Spear-LT and Spear setups. They are capable of being rather accurate rifles, with the right round.

Again, the barrel flex is not causing bad groupings unless you cause the flex to happen. You'll then get the flyer, as their video demonstrated, and it will then pull back to neutral/center.

I've been interested in a spear 7.62 x 51 but see some posts about flex and accuracy issues with this rifle.  That's a lot of $$ for a gun w/ accuracy issues. I have not looked through every page of this thread but would like some real world feedback on the reliability and accuracy of this gun.

I'm thinking about picking up a MCX-SSA trigger on the memorial day sale, but the Spear LT already has a decent 2 stage.  Anyone with experience on the G trigger can confirm whether or not the juice is worth the squeeze?

I read somewhere that the LT doesn't require the MCX version of geisseles triggers. I haven't yet replaced the one in my LT so idk from experience.

LT firing pin safety re-design permits AR-15 triggers to be used.

My question then, is it worth the $200+ to upgrade from the stock trigger?  The factory 2-stage is much better than a stock milspec AR trigger, which I always replace with an SSA.  My only gripe with the Sig trigger is that it feels too skinny, same with the charging handle.

Worth it is entirely up to you. If you prefer the Geissele feel, then yes it's worth it.

Different rifle from the first they used for the deflection test, but my guess is that the barrel in this one just likes the ammo they use. You can easily go from rack grade to match accuracy just by finding the right load for a given rifle, but as Henry points out, rack grade is sufficient for practical accuracy out to 500 yards.

Barrel clamp is fine. This flex/set issue is not present in the Virtus, nor LMT’s MRP, only the Spear LT with it’s handguard screws has shown barrel deflection that seems to reset after the first round is fired.

I would agree that the new handguard retention is a poor design, it doesn’t keep the handguard rigid enough to mount a LAM on the end of the rail without worrying about it losing zero, so it doesn’t accomplish its goal anyway.

MCX uses an elegant mount design, but doesn’t pair well with IR devices. Hence why I think the gen 1 MCX, or the original LVAW, were a better choice for that purpose with their longer receiver rails, which again, I figure was part of why they had longer receiver rails to begin with.

Virtus and Spear LT have shortened that forward rail to accommodate the shorter and longer barrels with one receiver; frankly, I think they should’ve just gone with two different receiver lengths, one at LVAW length for 9” or longer barrels, and a Virtus length for the shorter ones.

The two rail screws are 100% the issue.

They should have been flat or oval type and there should have been four of them, two rear and two front of the upper receiver where the +/- is.

My LT fell over, landed on the SF Scout, deflected the shit out of the rail so bad I had to loosen the screws to straighten it out. Was torqued to 60/40..

I bought a ZRC for my Spear 308 and my Spear LT but ultimately decided to not use them and to remove the rail screws from both, problem solved.

If you can accept the limitation of the MCX Spear platform and work around them, they are nice rifles for what they do.

Is there a recommended source for the Spear LT trigger and safety?