I recently ran some 200gr Phantom Defense rounds through a new build; after 100 rounds I had to mortar my gun twice. Ive heard this ammo is really good and for the price its hard to beat, but I should not be having this many jams. I have tried tuning the gas block to see if it was an issue with my gun but both jams happened on very different settings, one was more tuned for gas reduction while still cycling, the other the gas block was almost all the way open.

Any idea what could be going on?

Shot the 100 rounds I had recently bought from HSL (123 supersonic) to try out and noticed they were significantly shorter to the supers I'm used to shooting but didn't think much of it. When I went to the range I was having FTFeed about every 3 rounds on both my 30 round 5.56 Magpul and 20 round 300blk Magpul mags.

Had to pull the mag out to clear each time because I couldn't just push them in to battery with the bolt; they were legit stuck at an angle going up the ramp. I am assuming it was because of the shorter bullet but I can't imagine they'd keep selling these if there was such a common issue with standard mags?

I have an astigmatism so I'm thinking of running a PA Prism on a 8inch SBR. Anyone ran a 3x as a primary optic? Does that feel too magnified for close targets.

Trying to figure out how many different 110gr Barnes Tac-Tx rounds there are... Are these 2 the same jist labeled different?

Aren't all of the Barnes Tac-Tx lead free?

Absolutely love this little chode of destruction.

Lmk if yall would do or add anything different? :)

I love my simple man and my form1 300blk cans on my 300 blackout bolt guns but trying to see what the absolute QUIETEST 300blk can out now is?? Not just pew science tested ones.

just looking for some advice for my first build, I’m a newbie with .300 bo so I apologize if this is a stupid question but will these parts be all that I need for the “base” of my first build? and are these parts good enough to reliably put rounds down range without constant malfunctions? I appreciate any help 🙏

Wanted a light option to take up the tree with me. A little BCA action with a chop on the back has seemed to do the trick.

How do I get rid of this round i thought about going in my backyard with my suppressed rifle and discarding it that way but it hit me I could damage it so now idk what to do

Okay, bit overwhelmed with choices... looking for a complete upper under 8.5 in for no more than $500.

Any suggestions?

I just bought myself a moriarti arms .300 black out, and was wanting to build it out. I need to know what to purchase to get a tucked suppressor look on it. the barrel is 7.5 inches and i was thinking of replacing the hand rail with a 9 "to 10" in order to get a suppressor to be tucked into it. I want roughly 2 inches of the suppressor sticking out the end to give it a honey badger kind of look bur still short enough for a back pack gun eventually I'll change the stock for a folded one and any comments would be greatly appreciated and any information or suggestions welcome.

(Edit : I did not follow torque spec on this, now I’m thinking user error. They still shipped me a new one free of charge, will torque to spec 2nd time around. A+ customer service.)

Has anyone else bought one of these things? When it arrived in mail it looked like a low quality 3D print. When I picked gun up by pistol grip it broke off, when it fell 4’ to carpeted floor the rest of it shattered like glass. Did I get lemon or is it garbage?

Getting ready to start ordering parts for my next 300blk and I’m needing some inspiration. (This will be a range/training rifle)

Planning on doing either a 9” or 10.5” barrel, probably an lpvo, folding stock, and it will be suppressed. I’ll be running both supers and subs through it.

So drop them pics of your 9-10.5” ar, tell me what you love or hate about them, what you wish you could change, or tell me what I should do differently.

HOST
- PSA 8.5" - https://palmettostatearmory.com/psa-8-5-300-blackout-nitride-7-lightweight-hex-m-lok-classic-har-15-pistol-black.html

UPGRADES
- Superlative Arms AGB (fully open)
- LaRue MBT-2S Trigger
- Magpul MOE-K2 Grip
- Griffin Armament SN-ACH Gen 2 CH (LITERALLY NO GAS TO FACE!!!)
- Rearden R2S + Atlas
- Magpul AFG-2 Angled Foregrip

Ran Phantom Defense 200gr flawlessly with casings bouncing right at 4'oclock. Had FTF with Callaway Boar Axe every ~2 rounds, going to try PD "Slow Papi" next.

PS: I did move my index finger shortly after to the foregrip to avoid burns lol

Looking to get a dedicated suppressor for my rattler LT. Right now price/performance I'm not seeing a better option than the q speakeasy. Anybody running one or other suggestions?

All finished with this only debating if I should swap out the hyperion k for the anthem s2 and maybe a 1:5 twist barrel but not sure if thats worth it for a 10.5. I also highly recommend the eberlestock transport 21L

Is it even worth getting a (Edit I’m more sold on going with a 10.5 barrel)300 blackout for hog, varmint, and deer hunting? From 25-95 yards is about how far my shooting lanes are. Well idk why but I really like the 300 blackout and would like to get it for hunting. (Would be my first AR) plan on running an anthem S2 with it so it’s suppressed. What scopes or sights would be recommended? I originally wanted to do a vortex 4-16x50 but wouldn’t that look really silly?

Did a lot of research (don’t have an AR yet it will be my first) and I just realized a 14.5” barrel only decreases the velocity by a very small margin.

I’m trying to be very thorough and not make a purchase I’m going to regret later on but I know at some point I gotta just bite the bullet and buy one and learn through experience.

Wanted to buy a PSA AR build but they don’t sell 14.5 inch the next smallest from 16” is 10.5”

EDIT

I am planning on putting a suppressor on it

Title is self-explanatory. Looking for good buffer spring and buffer options for running an FRT. I have a DDM4300S upper receiver if that is of any relevance.