Help - What’s the best ar lower for an mcx upper? | SIG Talk
Sep 3, 2021 · Dr_Nimslow said: The MCX upper will be a "muffin top" on any standard AR lower, as it's wider than the standard AR upper. Also, it will not work on an LMT MARS-L ambi lower. There isn't enough clearance for the right side bolt release lever. My 11.5" 5.56 MCX upper currently resides on my SBR Radian A-DAC ambi lower.
MCX Lower??? - SIG Talk
Mar 9, 2022 · The lower in your post has a tensioning screw included. That screw can be set presumably to take out play between the upper and lower. Another alternative is to use an accu-wedge. I'm using a SIG MCX wedge that perfectly fits the threaded hole for a tensioning device. The wedge makes it a bit harder to close the rear take down pin though.
Aftermarket MCX/MPX Lowers and BCG - SIG Talk
May 6, 2024 · 2887 posts · Joined 2021. #5 · May 6, 2024. I’m pretty sure any Mil Spec lower will work on an MCX. I hear there will be a small gap between the upper and lower tho. A Mil Spec Bolt carrier or upper components will not work. The short stroke piston system is proprietary on the MCX/MPX. I’m not sure about the MPX but something in the ...
To run a standard AR15 lower on my Spear LT... - SIG Talk
Apr 17, 2023 · I've built three MCX lowers with the use of the stock adapter. SIG sells an MCX lower parts kit for $100 plus tax and shipping. The lower kit has the dual safety levers and dual mag releases just like the MCX so that the controls are the same. The lower parts kit does NOT include a SIG two stage trigger. Bill.
Sig MCX stock adaptor for standard lower.
Jan 1, 2018 · Yeah, understand your 300 SBR strategy with 516 lower and MCX upper, and sorry I wasn't clear. Am suggestion buying a discounted 9" 300Blk MCX pistol - that doesn't require ATF approval. Here's a GunBroker example completed sale for $1,199 which is probably very close to the price SIG will list their MCX uppers when/if they become available.
Anyone know if the Brownells BRN-180 Upper is Compatible.
Nov 3, 2021 · And some models have a monolithic upper. Brownells I think sells the model that's monolithic and comes with a khukov stock. But it's like 1k. But the standard model comes in at I think around 700ish if I recall right. If it jives with a MCX lower I may see about snagging a 556 upper. But at the prices they have I may as well get the whole thing ...
Spear LT part compatibility with MCX | SIG Talk
Mar 21, 2023 · 2887 posts · Joined 2021. #11 · Apr 26, 2024. I was talking to Osage County Guns about purchasing a Spear LT 5.56/300BLK Bolt for a caliber conversion and they told me the MCX Virtus bolt is the same. He said they must have the tapered lugs …
Question re MCX Virtus upper on AR lower | SIG Talk
7262 posts · Joined 2014. #6 · Jun 21, 2019. LOL - Yeah, am confused by Amy's note too. Here're SIG's Match Duo Trigger's hammer from my MCX Virtus on the left and SIG516's mil-spec hammer on the right. The Virtus hammer is about 2mils or ~1/16" taller than the 516's. BTW, I believe SIG includes their Match Duo triggers in their MCX Upper AR ...
MCX Lower on other piston upper - SIG Talk
May 28, 2021 · The MCX has dual recoil springs and no buffer tube, hence the folding stock or brace. As far as I know, all the piston uppers, e.g. my Sig 516, require a standard recoil assembly in the lower, just like a DI upper. I wouldn't think you could run anything but an MCX upper on that lower. The only other upper which you could use would be the BRN ...
SIG MCX Virtus Compared to Legacy MCX Rifle
Nov 28, 2017 · Running a 6.75" barrel on a legacy MCX puts the muzzle inside the receiver - Unless she's equipped with a suppressor. Virtus handguard is M-Lok vs Keymod on the original. Thanks for the QD mounts!! Virtus' 16" 5.56 barrel on top is thicker and has a longer gas system. Virtus' gas system on top has a gas ringless AK & PWS-like piston, with gas ...