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Are you interested in building and AR-9 but aren’t willing to burn a hole through your wallet? Well, you’re in luck because in this video we will show how you can build your own AR-9 for under $700.
LCT-9 Parts List
– New Frontier 8″ 9mm Nitride Barrel w/ 1:10″ Twist
– UnbrandedAR M-Lok 8″ AR15 Handguard
– Bear Creek Arsenal 9mm AR Bolt Carrier Group
– Guntec AR9 Gen2 Steel Compensator
– ATI AR15/M4 Stripped Upper Receiver
– DPMS Panther Arms AR15/M4 Stripped Lower Receiver
– UnbrandedAR AR15 Charging Handle
– UnbrandedAR AR15 ‘ELG’ Complete Lower Parts Kit (Purchase it here
– UnbrandedAR AR15 Complete Upper Parts Kit
– Buffer Set (Recoil Buffer, Buffer Spring, Castle Nut, End Cap)
– SB Tactical 3-Point Pistol Brace w/ Buffer Tube
– UTG 4 MOA Micro Red Dot Sight
– Magpul Gen2 AR15 5.56/.223 Magazine
– MeanArms EndoMag 9mm Magazine Conversion Kit
We were able to acquire all these parts through UnbrandedAR.com and Gunbroker.com for under $700. We hope this video has helped you in beginning your very own AR9 build!
Check out Lost Coast Tactical’s Gunbroker store at
#LostCoastTV #FirearmBlog #AR15
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Great info & details. Would like to see builds you've made in other calibers
Uh-loo-min-um. You are welcome.😊
That seems like a lot of kick. I have a Micro Conversion Kit for my springfield hellcat and it doesn't kick nowhere near that
Simple question what the best buffer for the 9mm PCC ?
The banshee uses a radial blowback design. When building a 9mm AR a heavier buffer (5.5oz for example) is really needed or you can get stung by the trigger. Also, having a fwd assist is not necessary on a 9, but if the bolt doesn't have the notches, the plunger should be removed IMO. Also when choosing a bolt make sure you get the right mags for the type of bolt, and ensure the hammer is compatible. Another thing to consider is adding a spacer.
Sorry to bother you but I keep getting g mixed answers. Alright, say that I have an ar 15 556 complete gun. Would I be able to use that lower, exactly how it is without changing the buffer springs or anything, with a complete 9mm ar upper with a conversion magazine? The 9mm upper is complete, barrel, bolt, everything 9mm ar.
Good video but you should use AR 9mm in your video instead of an AR-15 223 when your video is titled "How to build a reliable AR-9"
Thank you for this video. I'm a firearms newbie who's interested in getting a 9mm PCC. I heard you say 8" barrel. Does that mean this would need a special stamp as an SBR?
Also, can you recommend a part (or kit) that would make this a foldable? Thanks again
Hello 👋
I'm sorry if I sound stupid but I'm new to this and I would like to build an ar9 like that but I'm lost. So you got an ar-15 lower receiver and an ar-15 upper receiver and got a mag converter? Thanks in advance for answering
Does the magazine conversion kit support last round open bolt hold functionality?
Is this ca legal
which bolt carrier group?
PSA Gen4 4” or 8” 9MM complete upper $320.00. Put on a AR 15 lower (your cost will vary). 9 mm buffer and buffer spring (8.5 oz buffer minimum) $75.00. Endo mags (3) $80.00. Sights and or optic. Ready to go.
The problem is if you want less than 16” then it’s a sbr so then you’re paying 200 for a tax stamp if you’re state allow it
I’m having hard time listening to him cause I am holding my breath cause I feel like he is holding his breath too 😂😅
Nice pistols man, ima look you guys up
Muzzle flash is awesome? No no no
Absolutely 1500$ for an ar9 is theft
Thanks for the info always glad to find new sources.
What about reliability, long turn?
Do you find that the muzzle brake you're actually mitigates recoil?
Finger on the trigger? Come on guy
Is the bcg like that of cmmg for radial delay blowback, contains both extractor and ejector? Also bear creek arsenal does not list this bcg on their website.
The BM9 fostech edition is one of the best bang for your buck. The binary trigger alone cost $400. For a $1100 ar9 is what I paid for mine.
Hi is it necessary to run an extra heavy hammer spring?
I was astonished you don’t have more subs. My one critique, when I watch with headphones, the music is so loud that it takes away from the video and I find it hard to concentrate. It seems more of a take away than a background addition. Keep it up