Build Thread .450 Bushmaster mags

[aaronfeeney]

I have a pile of parts coming for a .450 bushmaster build.
I still need magazines. I purchased some magazine followers, but where can a guy find a decent deal on a small handful of 30R 5.56 magazines to modify for the .450 BM round?

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[slimmer13]

PSA GI are usually $7.99

 

[aaronfeeney]

I think PSA currently out of stock.
I found 5 on the way and ebay for 5 magazine followers for .450

 

[DRZ400S]

I use 20 round PMags modified of course but work flawlessly. PSA's cheap 30 round GI mags with the 450 followers also work good.