Not a true clone, but I'll pitch in a slightly-evolved derivative a couple cop buddies and I have been developing. (This is a Weight & Balance mockup built on a dummy lower; my part of the job was the top half and one of the other guys is building the live bottom half. The minor upper and lower parts and FCG are omitted to offset the weight of the solid, unmachined FCG-pocket area--remember, not to rub it in but where I live we can have 80%'s.) The concept is a "Discreet Carry" model for Stakeout Squad, Executive Protection and PDW-type roles; for Home D I'd rather have something similar but a couple inches longer with another rail-mount mag carrier or two. (When things Go Bump In The Night, one may not have time to fully gear up, and having a couple spares right on the gun ensures you at least have *something* to fight with even if you don't have time to throw on the LBE and other "Party Wear".)
Base model: West Coast USN EOD variant with Vltor CASV-EL handguard (I got literally the last one Vltor will ever make), combined with foregrip and maingrip of FBI tactical AR's (FAB Defense PTK foregrip and AGF-43 maingrip; I added the VTS thumbrest because it places my thumb just right to hit the switch on the main light). Green furniture instead of FDE in deference to operating environment (not a lot of Sandbox/Rockpile here on the Wet Side of the Cascades). Back half changed to pistol and suppressor deleted for US NFA compliance; Vltor A5 buffer system added for improved reliability and LAW Tactical sidefolder for "Briefcase Carry" capability. Indian Creek BFD collar (not pictured; awaiting bayonet-lug chop) to be added for blast mitigation; Precision Armament AFAB (under muzzle cap) selected for flash reduction. (This thing is being built to live in a briefcase with all the crud you'd expect, so I need something to keep dustbunnies out of the bore.) Optics changed to Diamondhead rear BUIS and DI Optical FC1 prism-sight to accommodate my failing eyes--without my glasses, I can't read the text on my laptop screen from a foot away, and back in college my buddies and I won a lot of free lunches on sucker-bets about "bet you can't outshoot the blind kid."
Specific components in my build:
--Andro Corp (Ballistic Advantage) 10.3" NSWC-Crane spec barrel
--Toolcraft black-nitride BCG (this is the same exact BCG that the US Defense Department buys for spares, except theirs are phosphated and this is nitrided)
--most of an Anderson LPK (pins, springs, detents) plus milspec ambi safety
--KNS anti-walk FCG pins
--Strike Industries ultralight extended takedown pins
--(planned) ALG Quality Mil-Spec trigger pack
--DSA Enhanced Delta Ring--this is my sole "ornamental" component choice, selected for its better fit with the CASV handguard
--SB Tactical SBM4 brace, with a Pmag in the "tunnel"
--Arisaka Mossie Mount for (planned) Lasermax Uni-Max green-beam laser
--Olight PL-1 II Valkyrie "dazzler" light
--Princeton Tec Switch Rail low-power red "nav" light (in addition to being nearsighted, I have very light sensitive eyes)
--CAA MPS mag carrier (works just as well on a forend as on the stock it was designed for)
--considering a Blitzkrieg Components chevron FSP for its possibilities as built-in elevation reference
I'm between image-hosts, but I'll edit in a pic when I settle on somebody better than Photosucksit, then add another once the last electronics are on and then the final once it's all joined together for range trials. Rifle punch in a pistol package with 62-64gr. Gold Dots or Mk 262.