Home AR-15 Turn your AR-15, Into An AR-9? Yup! Only 7 Parts, 3 Tools...

Turn your AR-15, Into An AR-9? Yup! Only 7 Parts, 3 Tools & A Few Hundred Bucks And Voila!

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YES! You can shoot 9mm with your AR-15 and it’s not too expensive at all. Today we show you the parts you need and how to build a 9mm PCC Upper! With these AT3 parts, this might actually be the cheapest way to get it done!

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We strive to provide the growing AR-15 shooting community with helpful, fact-driven information about the AR-15 & AR-15 style firearms and accessories to do our part in bolstering a more well-informed community and safer when handling, building or shooting their personal firearm. Let’s face it, we all have to start somewhere when it comes to becoming a firearms expert. Our goal is to help you get there one small step at a time. **The purpose and content of this video is to provide general information regarding the products and their applications on any/all related firearms that strictly comply with all federal, Minnesota state, and local laws. The viewer expressly agrees that AT3 Tactical LLC; its officers, directors, employees and agents shall not be liable for any damages or losses related to the products and information provided in this video and hereby agrees to hold the foregoing harmless from any such losses or damages. AT3 Tactical LLC is a Federal Firearms Licensee.

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14 COMMENTS

  1. I know this is off topic but nobody seems to be able to answer my questions about barrel length the question is what is the true effective difference between a 13.7" vs a 14.5" what are the pros and cons both lengths? I plan on getting one or the other, and it will be my primary weapon, used for just about everything. I have a 16" at present and it feels awkward and nose heavy to the extent it gets tedious. Please help with suggestions of lengths?

  2. awesome content: I've been wanting to do a 9mm PCC conversion build myself, just to much of a loser poor, and it sucks because parts, are at an all time low, and I know its not going to last much longer!

  3. How about a 9mm specific length buffer? A standard length AR-15 buffer is too short and too light for 9mm. Your way might be the cheapest, but it is not correct.

  4. The top loading mag adapters that lock in with set screws prevent a accidental mag adapters dropping out if you hit the stock mag release. I have seen a receivers bolt release pin hole modified to allow you to swap out caliber quickly. The modifications that are required drill and tap the rear hole on the bolt release like the AR 10 receivers are. Then install the shoulder pin set screw. Swap out is between the normal rifle and the Colt style 9mm pistol Bho is less that three minutes to do. I think you can get away with just tapping the rear hole if the hole of the bolt hold open is already drilled for the stock roll pin. You should be able to find a tutorial for the AR 10 80% receivers that cover the BHO Installation. Thread is a 6×32 x16? I was a certified gunsmith that built Ar 10 and 15 for years. However recently I lose everything lost all my tools and references in a theft /fire recently at my property.

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