450 Bushmaster

[XJThrottle]

Building a new AR in 450BM. Surprisingly, for a "non-mainstream" caliber, I'm not finding much.

Are there rocks I have yet to over turn?

[nvgdude]

The 450 BM suffers from using 451 bullets, so finding components that will stand up to rifle velocity is somewhat challenging.

Most folks would go with .458 SOCOM for a thumper since it uses .458 components which are much heavier built.

Honestly I think that the 450 is only somewhat popular in a couple Midwestern states that require straight wall cartridges for hunting.

[XJThrottle]

When I chose to go 450 vs 458, ammo for the 450 was considerably less expensive..hence my choice.