Both are just ripoffs. But thats ok. As long as they have IPRs. Besides I think even scar just blatantly copied the AR 18 system and put it in their chassis, which was improved upon by the ACR and similar chassis is on the SSS P72. Weren't the AR systems patented by Armalite? How come there are so many companies.. Even AKs.. Do patents not apply outside of a country?
@Milspec @Parthu @Gautam
AK's never had a patent, Armalite sold it's mfg to colt in 59, the patents have expired and colt has retained the AR15/m16 trademark, so any one can build a AR15 patterned rifle as long as they dont call it M16 or an AR15. Patents for FAL, G3's, and a bunch of other rifles have expired and are free for all type deal if you can hack it.
Small arms patent disputes are difficult to win, you can patent design, not the mechanism. almost 99% of handguns in the market use Brownings tilting barrel mechanism, 95% of the bolt-actions are Mauser actions, and the list goes on, for twist ratios, barrel coating, breach design, rotating bolts, locking mechanisms etc.
Coming to p72, as I have said multiple times, I don't know much about the gun so won't comment on it. As far as ACR similarity, CZ Bren is full SCAR ripoff, so is MKEK MPT a complete HK416/417 rippoff, so is the Sig g2 (from 417), similarly, all Jericho's, baby eagle, Tanfoglio, SAR B Series, Tristar series, EAA Witness are straight copies of CZ75. Most polymer guns try to mimic glocks and some are blatant copies.
I personally do not think there is anything wrong in copying a good proven platform, if you can pull it off; good for you.
Interesting comment on AR18, which brings me back to system design vs the mechanism. AR180 used the short-stroke piston, but so did the VZ58... It depends how you see it. on a separate note AR18, and later the Howa made AR180 were horrible rifles.
Mechanically speaking, a firearm is as complex as a stapler. This IPR business needs to be taken with a pinch of salt.