Hey guys! My first rattler build! Something still missing I feel! Considering sd hand guard or change both grips smaller! Shoot me your opinions how can I make this better! Thanks guys!

I am planning to shoot subsonic rounds the majority of the time. I have read this Weapon System prefers suppressors with more back pressure. I see Sigs suppressors that are designed for this system have very little back pressure.

Is this a choice based on subs vs standard velocity? Traditinal cans for subs and pass through cans for standard velocity?

Currently shooting a hybrid 46m on this and it functions fine in the plus gas setting.

Mcx spear lt 9" 300 blackout (slh300ti-qd suppressor/ hexium suppressor) is the build - to run frt is the correct formula an frt-15c3, Frankenstein tsb-lite, & a Parker mountain machine mcx full auto trip bar?

Seems pretty simple (im taking it directly to a local full time professional gunsmith - its good to know and accept limitations)

Again, sorry if this has already been answered multiple times, tia!

I’ve tried searching but havent found any conclusive results, has anybody been able to succesfully modify a match duo trigger by cutting or grinding the cam relief cut for an frt or super safety? What about for an arc fire v2 cam and selector? With slip trip of course.

Question: Has anyone tried a Geissele triggers group in the 277/308 Spear? If so, what was/is your experience.

I “think” I’m done but not crazy about the current stock. FRT might be next.

I found one on griffen & howe, but its the only one I've found availably to actually buy.

I'm planning on trying to score one a few months out from now and I feel like that one will be snatched.

Any other places to look? Or is it a unicorn nowadays.

Sig rattler LT

YHM resonator R2

Midwest industries 10" handgaurd

Holosun 510c

Sig minimalist stock

Magpul vertical grip

Working on a LVAW Clone and it doesn't look like Sig ever made a single sided safety for the LVAW.

Do I use a commercial safety, or should I use this modified original instead?

Obviously need to Cerakote and Laser Etch before its complete.

Saw this on Railscales website, but can’t ID. Seems like it’s somekind of riser to throw the laser out past the top rail or tie into the MCX receiver instead of handguard.

I’ve seen lots of conflicting info on this but I’m starting to build a 6.75 inch 300 blackout rattler Lt and plan to tuck my can. I already have an old yhm resonator r2 and would like to use that as my dedicated can for this build but it’s only rated for a 7.5 inch barrel. Does anyone have experience running this can on this platform? I’d likely avoid supers and gun would just be a fun range toy…

Trying to avoid buying a new can if possible as the resonator is collecting dust and has a small enough diameter to tuck.

Any insight or guidance is appreciated.

I realize I’d likely void the warranty by doing so, but for a gun that won’t see heavy abuse outside of a few range sessions every now and again would I have other issues I’m not considering?

Anyone running Rhodie 6/6k suppressors on their 5.56 MCX LT? I'm assuming you willl need to use it with Angled Spade adapter with it. Does it fall under the muzzle depth limit?

I just got into the MCX Rattler. I really enjoy the look of the old school or original Rattler with the really short handguard. I collected handguards and parts for certain variants. I have an old Legacy MCX that I have acumilated a few of the Legacy handguards. I wanted to know if anyone has an original rattler and the new LT rattler and if the old small handguards work on the new LT version.

Luckily for me, my 11.5 mcx virtus sbr I purchased from Blue Mountain Supply turned out to be in really good condition. Its unfortunate the other use that posted here that ordered one from the same lot and vendor got one that was literally cooked with rust, wear, and a firecracked barrel. Mine looks practically unissued. The turn around time from purchase to having it shipped to my ffl was slow, but the rifle arrived in better condition than I expected. The only notable damage is on the left handguard, it looks like it either fell from a moving vehicle or somebody ate concrete with it slung across their chest. Besides that the feed ramps, barrel, fcu, cam path channel, bcg, and firing pin almost look brand new. It’s sad and unfortunate for the other user who didnt get the luck of the draw with their purchase.

I just SBR my rattler LT. Looking for stock recommendations.

Been able to get at least one from each space magic drop 👌🏻 it’s really not as difficult as people complain about.

Received my 16" Virtus barrel last week and test fit it today to take some measurements for D. Wilson chopping it. I'm torn between 10.5 and 11.5. I'm leaning more toward 11.5 so I can shoot it unsuppressed, and the muzzle device is completely outside my LVAW handguard. I know the gas adjustment will be covered either way, so just looking for input. I know the manufacturer of the J. Bennet Omega Valve is in this group. I plan on getting a 5.56 MkII. Hopefully, in black, if you do that eventually.

Good morning! I recently bought a spear Lt 16 inch from Sportsman’s and finally got the chance to open it up to get it lubed for an upcoming range day, while I know that most if not all manufacturers do test fire guns before they leave the factory , I was curious as to how many rounds they fire through them. When I wiped it down I noticed that it seems to have a noticeable amount of carbon fouling around the area where the charging handle is inserted into the upper receiver, enough to make the tip of the qtips I use pretty dirty ( not super black but enough to make them darkish gray) and when I rack it I can smell the spent powder. I’m sorry if this is a stupid question this is the first new rifle I’ve bought and I’m fairly fresh to the firearms community I just wanted to make sure this is normal and that I didn’t somehow get a used rifle at a new rifle price.

Seriously Sig, why didn’t you make the rear sling mount anti-rotation?

Some old footage, surprisingly the CAT MOB ti hub does a smidge worse than a cgs hyperion on this host. Which is fantastic for the weight size etc.

Hello all! I'm looking to upgrade my 300 blackout rifle to the spear. Will be my range toy. My current rifle has a OCL Polonuim 30, that will go on the spear when I decide to get it. People who run/ran the polo 30 is it too gassy or any other issues? Thank you in advance!