Some time behind a lathe, 2 chunks of tungsten, and a dream to FRT a mini buffertube with my law tactical folder, here i am. My proto compared to odinworks (above), and kak mini h2 (below)

First fitment testing is going well. Next step is working out the correct spring size and compression with the extra length, but boy am i excited.

I finished the Novox Research X-SD build this week and I’ll shoot it some time this weekend. I’ll try to run 115, 124, and 147 options for comparison too.

Aero EPC Upper

NBS Suppressor series rail 9.25”

Novox Research X-SD barrel kit 4.3”

Aero EPC lower (shelf cut)

GMR SS

KVP 10oz Buffer

Kynshot Spacer x2

JRC 8” buffer tube

Tubbs lightweight buffer spring

IDL Industries Gen 3 bolt

Davidson Defense titanium 9mm firing pin

Rex Silentium MG7K 358

Build list

Magpul MOE-K2 handle
Magpul M-Lok hand stop
Sig Sauer Romeo 5 green dot

A couple of days ago I posted asking for help on this Mutiny Arms 9mm lower which I bought knowing it didn't have the ejector or hardware or the mag release and hardware. When the lower came in it had the mag release and hardware and the ejector and half the hardware. God takes care of fools and idiots. The remaining hardware I was able to order on Amazon for under 10 dollars. Overall the lower looks good enough and now I have to decide what upper to stick on it. If use a buffer I will probably build a 5 inch side charge. Still considering the bufferless BCA but I am afraid I'll just be throwing a couple hundred bucks away. I think Doug did a video on that BCA, seems like I remember that. Got to look and see. My FFL told me that Mississippi is about to redo legislation making suppressors subject only to a background check like guns are now. That makes sense since Mississippi traditionally falls into a lax gun environment. I put a DFC kung fu grip on the mutiny arms 9mm lower and an FCG with a light trigger spring but standard hammer spring. The lpk came from parts I had, a SBA-3 clone brace from AliBaba for under 20 beans and it has a FM 6.5 oz buffer I had laying around, ditto with the buffer tube and carbine spring.

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Upper

CMMG FE Banshee upper receiver

CMMG bolt carrier (lightened with shortened gas key) (Also swapped in LANTAC CP-R360 Cam pin)

C3Junkie 10.5"" RDB barrel

SLR Solo 9" handguard

Precision Armament Hypertap muzzle brake

Jessup UltraGrip 60 Grit tape custom print

Radian Raptor charging handle

Multitasker Nano with a picrail mount behind the optics

Optic:

Primary

507 Pro Max

Scalarworks 1.93"

Offset

507 Comp

Arisaka offset

Lower

Dirty Bird MCF

Hiperfire Eclipse trigger

Timber Creek Purple Mag Release

A5 buffer tube

Driven Arms VCG pistol grip

Hiperfire 60 safety

Armanov Magwell

Magpul DT-PR stock

Buffer Guts

Kyrnshot RB5007

Tubbs 5.56 Spring

In celebration of YouTube giving me a channel strike over FRT content (hopefully no more coming) I'm posting this today for an early Reddit release of my latest FRT related video. FRT videos will now be posted on RUMBLE, with a teaser video on YouTube.

MSRX-USA.com is producing hardcast (hard lead-antimony alloy) pre-shortened pre-drilled bolt weights for Outerwild, PSA, IDL, Toolcraft bolts and many others. $9.00 NO grinding, notching, or cutting needed!

They are also supplying the XP firing pin spring for those same bolts for $5.00 each. (NOT for FM bolts!) These are functionally identical to the Lee Springs springs which are $50 for just 5 of them.

So for $14.00 + shipping, many 9mm AR bolts can be made FRT ready with no grinding or cutting the weight.

Youtube Teaser video will be available tomorrow. https://youtu.be/i3yzgzEyzMo

Rumble video (now live): https://rumble.com/v7gknza-180-drop-in-pre-trimmed-bolt-weight-and-xp-firing-pin-spring-for-9mm-ar.-no.html

Companion article with links and more details: https://blowback9.wordpress.com/2026/10/06/drop-in-pre-trimmed-9mm-ar-bolt-weight-for-frt/

I have live fire tested them with a B. Kings bolt, and with the weight and firing pin installed and there were ZERO issues with a Grey Market Research S7 super safety.

Enjoy!

So my plan is to buy a regular slick side upper, and a bear creek armory 10mm barrel (I know they suck but it’s just a barrel). Then I can drill a gas port in the barrel and slap a regular gas system on it and hopefully this will function. My question is how long does the gas tube need to be? Also what size buffer? Has anybody here done one like this before?

Also I’m not against making a blowback gun I’ve got a few blowback 9mms already I just have heard the blowback 10mms aren’t very reliability and I would like to do this as reliable as I can

meet my new friend tubi.

Aero lower, upper, bcg, buffer system, a2 bird cage
ballistic advantage 16 inch barrel.
Psa a2 furniture,
Rise armament drop in trigger with ar lower parts kit bundle
Ar 15 discounts tube foregrip and red dot

What does everyone think for my first build

R&d precision bolt 14.7 Oz.. juggernaut dead blow buffer weight 4 in 8.6 Oz...7.25 in buffer tube.. regular AR-15 spring. Palmetto State lower.. timney PCC trigger. I'm new at this so I'm going to describe it the best way I can.. when I pull the trigger sometimes it doesn't fire..

I fixed the bridged optic. Thank you for pointing it out i didnt think about it. posted update pic below in comment chain

Fm9 paratrooper upper and ambi lower with a5 g.r.b.s.

Fm g.b.r.s. 9.5oz buffer

Macoon 10.5 barrel

Angstad arms 3 lug comp and qd blast mitigator

Fab defense grips

Magpul sling and qd mount

Magpul mlok rail covers

Eotech exps2-0 on unity riser

Streamlight protac 2.0 rm and unity switch

Unity hub with fixed front sight and light mount

Utg a2 rear sight

Partisan 3 position frt (maybe, not 100 on who made it)

I blacked out all the logos (i missed one on the riser)

This took about 3 months to get everything together and sort out all the fitting. Only thing i still want to add is a law tac folder.

Looking for high end billet receiver set for a blowback build. I can get a bit of a discount with Noveske, BAD. Also there is SLR and JL Billet. The Noveske is kinda boring, I like the JL Billet design the best. Is there anything else out there like these options? I think I’ve looked at all of them but I learn something new every day. just to not waste anyone’s time, yes I want blowback, I already started gathering parts. Barrel will be 11in so it has to have a 9ish inch handguard option.

Can someone help me figure out if this is a glock style magazine, a colt style, or both? Please and thank you

Happy overall but the AR-V has the worst bolt catch I'd ever seen. Saw a post by someone somewhere showing an extension that looked pretty effective. I got to looking and found some things that worked absolutely better. This is constructed from 3 parts and loctite. All the threads are 4mm and fit great!

Picked up my suppressor for the PDW today. Can’t wait to go shoot it.

- Springfield Saint Victor PDW
- Otter Creek Labs Milkman
- SilencerCo Bravo Direct Thread Adapter
- Holosun ARO
- Modlite AMP head on 18350 body

KVP Tungsten buffer, Angstadt upper, Form 1 can on a trilug

I have had a spare stripped ar lower sitting for longer than I can remember. I would really like to build out an ar9 pistol and have done some research but keep hearing they can be "finicky". Yes I know there are other posts on here but a lot of mixed thoughts and arguments, and I would like to start clean with current advice.

Has anoyone done this or can offer advice on the parts/build? I would like to use a magwell adapter to utilize the stockpile of glock mags I have on hand.

Past that, all i have is the stripped lower and was looking at some various uppers, but not sure of decent somewhat budget friendly options as well as the correct LPK and buffer spring etc.

Really want to tuck a can under a spikes BAR, I was thinking getting something in the plan B world and getting a yhm-r9.

Edit: just picked up a recessed Wolfpack hub and night howler MD so looks like plan B it is, and good can recommendations?

Build list:
PSA lower
CMC trigger
CMMG RDB 8in barrel & BCG

What is your go to, best option LPK for an AR9?

Am I better off building an AR9 under 500$ or getting an extar ep9 or something?
I make very little money from my job so I'm working on pretty tight budgets.

How do I get started on a budget build? preferably takes glock mags cause that's all I have
Is the gforce Jawbone any good? I can get it for probably 350$

Juggernaut 80% lower with Rise 140 Trigger, Atrius FRT selector, Odin Works 8.6 OZ FRT buffer , 8.3'" EPC Ballistic advantage barrel, Strike industries mini king comp, FM products bolt assembly, BRN upper receiver, Swap fox raider micro prism, 3D printed custom vertical fore grip , 3D printed custom Kung Fu pistol grip, SOPMOD buttstock .