Buffer spring strength

[Bill Daniel]

Are AR 15 buffer springs weaker than AR 10 buffer springs? As in force required to compress the spring.
All the best,
Bill

 

[T. O'Heir]

These guys say buffers and their springs are NOT compatible. Both the bolt carrier length and the calibre difference matter.
https://www.wingtactical.com/blog/what-parts-are-interchangeable-between-ar15-ar10/

 

[Scorch]

Are AR 15 buffer springs weaker than AR 10 buffer springs?

Absolutely. Spring ratings for AR-15 springs are much lower than AR-10 spring ratings.