They are, depending on the threading will determine if theyre 9 (3/4-10) or 45 (7/8-9). The M10 and M11 versions are identical, for ease of viewing I’ve only placed links for the M10 versions below
#1/3/4 are gen 2 versions of the two stage design:
9mm version:
Check out the deal on Cobray MAC RPB M-11/9 M-10/9 9mm GEN II 2 Stage Sionics Style Fake Suppressor 3/4x10 tpi at FTF Industries
www.ftfindustries.com
45 version:
Check out the deal on Cobray MAC RPB M-10-45 4 5acp GEN II 2 Stage Sionics Style Fake Suppressor 7/8x9 tpi at FTF Industries
www.ftfindustries.com
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#2 is a gen 1 version (only difference being the standoff at the barrel’s end; gen 1 lacking, gen 2 has) of the two stage design:
9mm version:
https://www.ftfindustries.com/product/ET-AC9FS2-10.html
45 version:
https://www.ftfindustries.com/product/ET-AC45FS2.html
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#5 is a single stage version (to my knowledge there was only a single variant of these made, both 10/11 being identical):
9mm:
Check out the deal on M-10 M10 9 Straight Fake Suppressor 3/4x10 tpi at FTF Industries
www.ftfindustries.com
With all of that being said, I’ll give ya $50 for any of the top 4 if they’re 9 not 45