Uploaded April 2019 | Updated September 2026, 7 hours ago
Today we're going to find out if this 9mm AR 15 Pistol is a viable option or not. I have a few concerns. To make this 9mm Ar 15 Pistol conversion possible we're using a 9mm AR 15 Upper and a standard 5.56 lower. 👇 Gear Sheet: ToolboxSpecs.com/pages/access?setup=specs-174
This video is for educational and documentary purposes, demonstrating technical specs and safety features in my Office which is a controlled environment and Regulated outdoor Range with a Safety Officer present in compliance with all legal and safety standards. DO NOT attempt to recreate, imitate, or replicate any activities performed in this video.
The idea of a simple way to change an existing AR-15 lower and PMAGs to use 9mm is fantastic for saving time on training. The EndoMag promises to do just that, even retaining the last round bolt hold open (LRBHO) feature, which many other methods lack. However, reliability is key. We discovered that while the EndoMag worked flawlessly with some uppers (like the Faxon and Angstadt Arms), it caused malfunctions with others (the FM Products side-charging upper). Watch our in-depth diagnosis to see why we think this is happening.
This video showcases a standard ar15 lower, converted to accept a 9 mm upper, complete with internals to adapt PMAGs for 9mm rounds. We discuss the merits of 9mm ARs, touching on viewer opinions and testing the ar9 setup at the shooting range. This ar 15 conversion provides a unique pistol experience for those interested in alternative calibers.
LEGAL & SAFETY DISCLAIMER:
Tactical Toolbox is an independent media outlet. This video is for educational, documentary, and scientific purposes (EDSA). We do not sell or give away firearms, ammunition, or regulated accessories directly. All local and federal regulations apply. *This video was filmed in a highly controlled laboratory and secure range environment. It is strictly for educational, scientific, and documentary purposes. We do not manufacture, sell, or process transactions for firearms or regulated components, nor does this video provide instruction on how to manufacture them. To remain in 100% full compliance with YouTube's 2026 Safety Guidelines, this channel does not provide direct links to regulated items in the public description.
Today we're going to find out if this 9mm AR 15 Pistol is a viable option or not. I have a few concerns. To make this 9mm Ar 15 Pistol conversion possible we're using a 9mm AR 15 Upper and a standard 5.56 lower. 👇 Gear Sheet: ToolboxSpecs.com/pages/access?setup=specs-174
This video is for educational and documentary purposes, demonstrating technical specs and safety features in my Office which is a controlled environment and Regulated outdoor Range with a Safety Officer present in compliance with all legal and safety standards. DO NOT attempt to recreate, imitate, or replicate any activities performed in this video.
The idea of a simple way to change an existing AR-15 lower and PMAGs to use 9mm is fantastic for saving time on training. The EndoMag promises to do just that, even retaining the last round bolt hold open (LRBHO) feature, which many other methods lack. However, reliability is key. We discovered that while the EndoMag worked flawlessly with some uppers (like the Faxon and Angstadt Arms), it caused malfunctions with others (the FM Products side-charging upper). Watch our in-depth diagnosis to see why we think this is happening.
This video showcases a standard ar15 lower, converted to accept a 9 mm upper, complete with internals to adapt PMAGs for 9mm rounds. We discuss the merits of 9mm ARs, touching on viewer opinions and testing the ar9 setup at the shooting range. This ar 15 conversion provides a unique pistol experience for those interested in alternative calibers.
LEGAL & SAFETY DISCLAIMER:
Tactical Toolbox is an independent media outlet. This video is for educational, documentary, and scientific purposes (EDSA). We do not sell or give away firearms, ammunition, or regulated accessories directly. All local and federal regulations apply. *This video was filmed in a highly controlled laboratory and secure range environment. It is strictly for educational, scientific, and documentary purposes. We do not manufacture, sell, or process transactions for firearms or regulated components, nor does this video provide instruction on how to manufacture them. To remain in 100% full compliance with YouTube's 2026 Safety Guidelines, this channel does not provide direct links to regulated items in the public description.
