Home AR-15 How to build a reliable AR-9 for under $700 by Lost Coast...

How to build a reliable AR-9 for under $700 by Lost Coast Tactical

527
26

Support the Channel!
Join our Patreon

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

Note to readers: Please click the share buttons above or below. Forward this article to your email lists. Crosspost on your blog site, social media, internet forums. etc.

26 COMMENTS

  1. 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.

  2. 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.

  3. 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

  4. 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

  5. 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.

  6. 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

Leave a Reply