Home AR-15 Affordable 300 BLK Upper

Affordable 300 BLK Upper

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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.

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38 COMMENTS

  1. First of all, being forward of the "firing line" is sketchy… Im actually shocked at this range. Not hating on you brother, just the set up. NOW, the feed issues were probably because of the 556 mags, its more common on 300blk than people make out to be. Only thing reliable 100% is actual 300BLK mags. Awesome video, really enjoyed it!!!!

  2. Adding rail sections is a big deal, they can cost a lot for just a couple and finding them can be a pain in the butt, good on Gilbert. I have the same set up the 300 blackout with a 5.56 so I can shoot whatever I feel like.

  3. Sitting hear watching this again drinking a cold one thinking look how much we learned this year. Seriously how many polymer 80's did we all do how many ar15/10s and then there is the 1911/2011 builds now those are fun! I like your builds ever think of a 2011 build? I Think you would have a blast blingin one of those out let me know if interested I can send you one of my 80% 2011 frames if nobody will help out.

  4. Nice short and sweet video. One thing that should be pointed out… you shouldn’t swap all your bolts around with checking headspacing. 99% of the time with an AR platform it’s fine, but there’s always the chance that it’s not. I always buy a new bolt or BCG for any new barrel and check headspacing. Better safe than sorry. Also, as far as calibers, my favorite is still the 5.56, but I’ve had a 300BO for many years now, mainly for hunting 100 yards or less. They’re very soft shooting!

  5. I can't really like keymod, only because it looks like men's junk and my garage shelves all up and down the rail 😃. Cosmetics aside keymod and mlock (and picatinny) are all equal in my book 👍

  6. I'd like to see you do a review on the new 224 Valkyrie cartridge. That's supposed to be the new 223 cartridge that's capable of 1300 yards and still going supersonic. There's been a bunch of talk about it but very few reviews on YouTube. Maybe you could do one for us all?

  7. Yeah I agree with you sir on the handguard, if you're going into military combat or you're a contractor then yes in lock is stronger. But for all reality for civilian use keymod is tough as Nails as well just a tiny bit weaker than m-lok. Also you should try some 300 Blackout 220 grain subsonic. If you thought the hundred and ten grain or soft shooting you ought to shoot the 220 grain subsonic you can't even feel the rifle recoil.

  8. Hey, i wanna get my G26 slide done to look like the G19 battle worn slide. Didn't know where to look or who to ask. If you know anybody that those it please let me know. thanks

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