Last updated on February 18th, 2026 at 04:12 pm
Let’s look at an affordable 300 blk Upper for an AR-15
Today we have an affordable 300 blackout conversion kit from NSR Firearms.
The Concept is simple, Re-use your current bolt carrier group, charging handle, and magazines from your AR-15 5.56 vs. .223 and put them in the 300 blk upper receiver.
Load it with some 300 blk ammo and have fun.
This upper has been discontinued, but check out these Awesome 300BLK Uppers Below
Super Affordable 300 BLK Uppers
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Aero Precision 300 BLK Uppers
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My Favorite AR-15 Triggers
UPDATE: This is my NEW All Time Favorite AR-15 Trigger
Use Code TTB10 for 10% OFF!
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Geissele Triggers
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Hiperfire Trigger
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Velocity Triggers
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Elftmann Tactical Triggers
Use Code TTB10 For 10% OFF for Brownell’s
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Airborne Arms Geronimo Trigger
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Pre-Order for my Courses
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Optics and Red Dots
Holosun HS510C
Use Code TTB10 to get $34.00 OFF at Brownell’s Link
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This is Where I Find Cheap
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Tier 1 Concealed MSP Holster
It fits any gun that has a SureFire X300, Streamlight TLR-1, Modlight PL350 and PL350C
Flexible and Moves with your Body
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NEW Surefire X300 TURBO – 66,000 candela
Use Code TTB10 for 10% OFF + FREE SHIPPING on Orders $150+ w/Brownell’s Link
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My All Time Favorite Concealed Carry Holster
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Add a Holster Wedge to Any Kydex Holster
- Pushes Grip further into your Body
- Adds a Cushion above Pubic Bone
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My Favorite EDC Gun Belt – Designed for Appendix Carry
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My Favorite Wireless Electronic Hearing Protection
Pricey, But Worth It
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This is how I save about $0.25 cents per gallon on gas
(Not sponsored, but totally works)
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Here W/ The Codes
10% OFF all Orders $150+. Use Code TTB10
No Expiration
My Favorite AR 15 Magazines for Practice & Range Use
ETS Code – Use Code ETSTOOLBOX for 10% OFF
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