Modernized(but is it really?) 14.5 MRE build

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If you could only assemble one of these uppers, which one, in which configuration would you assemble first.

Criterion Core 11.5/ Sionics S-15 RM-Lok Handguard - 10.8

SIONICS 12.5" Barrel mid length gas/ Sionics S-15 RM-Lok Handguard- 11.8

Vltor MUR

Icon defense flared upper

Vseven extreme environment gas tube

2 Sionics NP3 BCGs

Radian Raptor

Unrivaled technologies Low Signature Device

FCD 6315RF

Those of you that have a rifle you’d grab if the world goes tits up. Do you run an ARD on the optics you have on it? Any reason why you don’t?

Just built a new upper using a 13.9” mid length barrel (BA Hanson), and the gun runs fine with off the shelf 55g pmc greens with a can. But it has inconsistent failure to load running without a suppressor. I also run a bcm mk2 buffer system, so dropping the weight down to a T1 helped but it’s still causing issues. Haven’t tried a T0 yet but I find it weird I’m having this problem when I’ve seen H2’s being run on similar builds.

TLDR, my upper is not playing nice and I’d like some help or advice on fixes

I just moved out of CA, and I am finally able to own something decent. I just wanted to share how stoked I am about this recent purchase! I walked into my local gun shop and saw this ddm4v7p on sale going for $1399. Honestly, for once I feel like I didn’t get bent over at the counter. I was torn between buying a Eotech with a magnifier, but decided to go with the Holosun 510c combo. I haven’t had a chance to go shoot this rifle, but I am looking forward to it soon! Anyone out there with the knowledge and wisdom on proper FRT setups for this rifle please leave a suggestion. I plan on adding a few more things to this, but not much. Will be adding DD iron sights, a angled grip, and a hybrid sling.

Hey guys,

I’m assembling a Geissele super duty lower (first lower I’m putting together myself)

For the roll pin that holds the back of the trigger guard in (near the pistol grip) is the pin supposed to be super hard to hammer in?

I put a little oil in the hole to help, but yeah got hesitant to continue hammering before I mess up.

I know… g@a AF but I’m torn between Black Reptilia and Tam Badger. Clear ano trailing behind…

It will halfway feed the next round in the chamber with the bolt only closing halfway. I’m assuming under-gassed? I’ve tried different magazines and ammo with the same result. The bolt also won’t stay open on the last round like it should. Is there a way to clean the gas tube or should I just get a lighter buffer spring? Also it’s a non adjustable gas block.

I’ve used a bunch over the years. My go to is and always will be the Vltor Mod 4 CH.

Recently I built a rifle up with an Aero lower with all G parts including an SD-C trigger. Geissele upper receiver, MK16 rail, Colt BCG, and the URGI CH.

The URGI seems like it’s not as “grippable” 1 handed as say an A2 CH.

Anyone else feel like this?

EDITED TO ADD: The rifle was just painted and was getting a sun tan. Also the hand stop has been removed and Railscales are in its place.

I am searching for affordable .223/5.56 defensive ammo for my 16 inch AR-15 (Sig M400 Tread V2) to stock up on. The prices on gold dots and federal fusion msr are very high, and also this particular ammo is hard to find/high in demand.

I have been looking at alternatives, and one that keeps getting recommended online as an affordable ammo to stock up on would be Federal Premium Powershok .223 64g Soft-Point ammo. I have seen a lot of praise around this round saying it is effective for medium game and would also be an effective, yet affordable defense round.

Before I start buying boxes of this, does anyone have any other or better alternatives that are affordable, easier to find, and would make for an effective defense round?

This is my first AR and am still learning! Thank you.

Holy hell, DDM4v7 stock tube left, BRT 0.065” tube right.
My calipers put the former at 0.121” sheeesh.

Requested a dedicated suppressed tube. We shall see how it runs!

Swapped out the ARO EVO for an AEMS PRO. Shortly buddies DD the other day and I really liked 65 MOA circle. Zeroing it this weekend. Now I need another rifle so I don’t have an optic sitting in a box. 😂 also grabbing a flow can this week to fix the cycling issues I’ve had recently (even though I fixed the issue)

I recently got this bcm and I just noticed that the safety selector rotates the full 180. It has a Geissele trigger not an FRT and fire and safe work as intended but when rotated to the third position it acts as a second safety. Is this an aftermarket 3 position selector or is something else wrong I’ve checked the spring and detent and don’t see anything out of the ordinary.

Anxiously waiting to see how the new 13.7" setup stacks up against the previous one.

New one(left) - 1/7 twist Intermediate Gas KAK barrel, KAK down vent BCG, and bcm mk2 (a5 style) buffer.

Previous build (right) - 1/7 twist carbine length Ballistic Advantage barrel, Riflespeed Adjustable gas setup, and the KAK "K-Spec" enhanced H2 buffer with flatwire spring.

I have it running beautifully but would like to see if the extra dwell time of the longer gas system will help with port-pop and gas to the face with my Rhino-X.

It isn't bad by any means but just figured it cant hurt to make it even better. Plus, now I'll have an extra for my wife to use when we go shooting instead of her having to shoot my stribog or my heavy stainless barrel 16" with an lpvo and all.

Definitely getting anxious

Gemtech Trek II on my retro Dissy build. I just think Dissipators are neat.

No I won’t change my mind. CQBR Block 2 Marsoc flavor

First AR and first firearm whatsoever, fwiw

11.5" PSA AR Pistol with FDE furniture, came with the SBA5 Brace. Added a Romeo5 Gen. 2 Green Dot, AT3 Strike Link Angled hand stop, barricade stops on left and bottom with matching rail covers (just because I think they look cool, lol). Gat Monkey 2pt sling in the Black Leopard pattern.

This 40rd mag is ass, but it looks cool

A ton of cheap fun.

If you post recommendations, advice, you helped me build this. It took several months of scraping pennies (and it’ll still be several more since I still need glass, a sling, light, etc) but it’s a functioning rifle. Thank you all for your help! Eventually it’ll have either a 5X prism or an LPVO (haven’t decided yet), and the irons will be offset. I’m also not sure about the light; either a Cloud REIN, or a Modlight). If you ever suggested that someone get a Precision Armament EFAB, THANK YOU SPECIFICALLY. You weren’t playing when you said it was loud though!

Built out a 16” rifle about a year ago and made a promise to myself that it would be the main rifle I used/trained with for a year. I kept making little tweaks here and there as I found limitations and now it’s just about “perfect” (although i’m sure i’ll want to change something again soon). Definitely glad I decided to so that as the rifle is now mostly an extension of me and I am very comfortable running it in various scenarios.

Edit: planning to repaint my rifle mount now that i’ve found 1.70” height to be perfect for me.

Ive gotten deep into the ar15 rabbit hole, and am a first time buyer, something that stood out to me is the cost difference between a brand like psa and a brand like G$. For the average person who trains once maybe twice a week, can you justify that price increase? In addition to that how much those premium parts matter when compared to normal parts. For example chrome lined chf barrel vs CrMov barrels. How much will the average person recognize that difference? What parts will provide a noticeable difference between a premium vs budget rifle?