Polytech Parts Interchange Question

[w10085]

I have a "post-ban" SA M1A with a flash hider but no evil bayonet lug. I have a friend who has an extra polytech or norinco M14S flash hider with a bayonet lug. Are they interchangeable or is there a way to tell other than him mail me his part and I disassemble my rifle and try it on? I figured asking might be easier. Thanks in advance for any help.

Information

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[Buntlineguy]

I changed mine and had no problems.
B

[browningautorifle]

Guys around here put M14 flash eliminators on Poly's as required. No problem.

[w10085]

Thanks. I'll make it happen.