u/banned4evver

My friend got rid of his 300 BLK and has a 4 brand new Magpul 300 BLK magazines he was going to trade me for 2 boxes of 556 PMC-X tac or $20 cash

I don’t have a 300 BLK but might add one in the future. Any reliability issues with using 556 in a Magpul 300 BLK specific magazine?

Bought a ballistic advantage blem barrel for $80 in 5.56 …7.5” barrel before realizing my SiCo 36m is only rated down to 10”.

I guess seeing a blem sale at 50% off was too much for my tism to handle…

What’s the worst thing that will happen? Besides unaliving myself? Baffle erosion? I’m not doing magdumps or running an FRT and honestly I run my 16” for most things…

This is just a “fun upper” I am assembling