r/FluxDefense

124 and 147 Blazer worked with zero issues unsuppressed. That was without the TacDev rail.

Suppressed, the 147 Blazer was not reliable, even with a 12 lbs recoil spring. 147 Federal HST was 100% reliable suppressed with the 12 lbs spring, but a small sample size. Both the blazer and the Federal 147s were super quiet. Shooting without ears outside I could easily hear the sound of the slide and there was zero discomfort. It’s probably not 100% hearing safe, but it’s not unpleasant.

More ammo testing to be done.

Things under consideration:

1. Charging handle: will probably go with Tac Dev MSP. Anybody with feedback that has one would be greatly appreciated.
2. Light setup. I may upgrade to a TLR-1 HP with the remote switch. Still considering options. I want to keep it as slim as possible, but I think a remote switch is required.
3. Long term optic solution. The 509T is a placeholder. I’m not sure

if

1. I want to move it forward with the Tac Dev forward accessory rail. I need to do more shooting. I would like to hear what people feel about the forward rail mount.

Edit: hopefully fixed the formatting glitch!

First time shooting it. Excuse the reload 😂. Ended up going with a Raider 365 Aluminum, with a FUSE Donor that i added a manual safety too, for this. Eventually I'll add a 6.5" Threaded Barrel. Shoots amazingly. I have an Olight Baldr IR that im going to add to this for night vision capability, but it wont be on EDC because of the holster incompatibility. Its QD, obviously wont have a zero worth a shit as QD, but wondering it would most likely be used inside 25m, not an issue.

Anyone have any recommendations on accessories? Forward mount isnt in the plans for now. I had no issues with the rear and dont want to spend the extra 400 on a mount, charging handle, and new holster😂

Anyone have hands on time with the newer mag holder extensions? I'm hoping for a fde restock hopefully soon before I lose motivation. I'm torn between what charging handle direction to go in and for optic. I sorta wanna try the route with a acro p2 or wait for the newer AEMS micro/macro when they get out and tried

Picked up a 365X slide with the new Shiv and haven’t shot it yet. When the slide is locked back, there’s initially a small gap between the Shiv and the optic/mount area. However, with the normal barrel play that exists even with the slide locked, I can wiggle the barrel upward enough that it fully makes contact.

I remember seeing a thread where someone cracked a Shiv in almost this exact spot on a non-Flux setup, so I’m wondering if I should hold off on shooting it as-is or if I should carefully dremel a little clearance into the contact point first.

Anyone else run into this?

Decided to go with forward optic mount and robbed the 507c from my dwx for now. The Eps carry I had on slide was just too small and didn't look right on the mount. About done except for a charge assist slide optic plate and sling.

First range round with the Raider X M18. Head shots are with the Raider at 15’ & 25’. Body shots are a stock Glock 43x at the same distances.
This build was a bit tricky, USPS lost my safety delete pin, thankfully trigger pins for an AR are exactly the same diameter and perfect length. Threaded barrel is in route; starting with a comp, but with this NFA ruling that might change.
Vortex Defender ST & TRL8X are carried over from the M18 original setup.

*Before you all critique the trigger finger, it was empty.

XMacro slide, Ballistic Advantage barrel, stock recoil spring. Ran 115 grain federal (100 ) and magtech (50) without a single issue. It did not like the 147 Fat B from Badlands but neither does a couple of other guns I have. Ive only be able to get the Raider X to run that ammo without issue. Video is the last few rounds of the magtech

With the current court ruling on the NFA, do I still need to fill out a form 1 to SBR my Raider?

I had no intentions on running suppressed but I came across a threaded barrel on sale. If it’s anything like its 320 version I’ll definitely need to wait on my lighter recoil springs to arrive before the next range trip.

Spoiler Alert 🚨 125k pistols and zero issues!

Full report here:

https://soldiersystems.net/2026/08/07/us-air-force-supplemental-inspection-of-m18-modular-handguns-found-zero-evidence-of-conditions-which-would-allow-uncommanded-discharge/

Strike industries PVC patch for reference

Current build components: Fuse slide, Flux / True Precision 6 in barrel, Orbital Drop Helper tall portal charging handle, Flux full-size magwell, Flux mag release extension, Tac Dev Thicc Forward Halo, Tac Dev forward operating pedal, and Holosun 509T.

My vision for the future: swap the barrel for a threaded barrel and add a suppressor. Add a full-size light like the X300 or TLR-1, and with it, add a light brace to accommodate it. When Tac Dev releases their low pro QD mount I want to add that with a Flux Rip cord sling. Lastly, I want a standalone FCU for my Flux, with a safety and an extended slide release. I'm thinking the Ramm Tactical FCU for that upgraded trigger. The stock trigger isn’t terrible in the P365 as a handgun, but in PDW format it could be lighter.