There is literally no difference. Just sharp gas block cut in Trichy and curvy in M1F41. No cleaning rod in Trichy.
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Arsenal is offering side folding stock with M1F41
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In case of Trichy fixed, side folding, under folding & adjustable stocks are being offered.
It's kind of TOT licensed production so Trichy is exact copy of M1F41 with minor differences in gas block, stock & pistol grip.