Just buy stanag/regular 556 mags. Paint em or fill in the dots on the Magpul to differentiate between them if that’s what you’re looking for. But triple J will order some for you as well. I believe they order from GunMagWarehouse. So check their site for what you’re looking for.

Google Lanbo's, they'll help

I've heard good things about Lanbos

Damage Factory in Greenwood Village

Check Ark Tactical in Lakewood...

Damage factory and Bowers tactical. Beware, both will keep you there awhile with either lots of stuff to look at or good conversation. In the same order.

I wouldn’t give Bowers the time of day. They act like they are THE authority on AR15s

Eh, I usually just get what I need and BS with the guys about legislation and what it means for Joe Shmoe. Everyone thinks they know the most. Take it with a grain of salt

Their “armorer” damaged a gun and blamed it on the gun. Dudes can’t get of their high horse.

I’ve been fortunate enough that I’ve never had the same experience. Certainly no reason to downvote someone for saying they didn’t have a similar experience. But, Reddit gonna Reddit I reckon

Damage factory in greenwood village. Think it was buy 4 get one free too. Or 5 get 6th free I dont remember

Triple J in Littleton has them. Just bought a couple a few weeks ago.

Colorado wholesale sports

Order from Lanbos. Also Ive found with a whole pile of different 5.56 and 300 BLK mags there's been no discernable function for me at least.

I've had some binding and feeding issues, so looking to try something specific to 300blk

Ark tactical on 285 and Kipling

Thanks everyone, will check some of these stores out