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this is more of a poor mans modern "93r"
im not looking to please the purest, that proves to be far too costly.
im going for the look and feel of the 93r without the 15k+ entry fee
probably a m9a1 as a base, forward grip, 93r stock, metal trigger, better sights (2 dot) skeleton hammer, ported barrel , threaded barrel and a suppressor
so as you can see not totally correct.
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Not correct, but also not possible. The 92's grip frame does not have enough meat in the bell of the grip to attach the twin pin hinge mechanism for a 93R stock, plus a 93R's grip is slightly wider than a 92's (due to the added meat) so you would have to shim the hell out of the pins... not to mention finding an actual 93R stock for sale that is not a flimsy airsoft part. The last real 93R stock I saw for sale was over $500... for just the stock... and it was missing the pins. Plus you would need the rear loop / mainspring housing (which the stock assembly also attaches to) as well as modified grip panels as the hinge juts up into the grip panel area. And 93R grip panels will not fit a 92... you could just tab cut the 92 grip panels but that would look ugly as sin IMO.
Then you have the second problem with using a 92 as a 93R host: the forward grip and the barrel. The reason the 93R's barrel is so long and top ported is to get the muzzle blast up and away from your fingers, and also to provide a little bit of "oops" room in case your grip slips off... which is another factor of the 93R, the elongated trigger guard. Which is there to thread your off hand thumb through to aid in not losing your grip on the angled foregrip. There will be no such provision with a 92, and not enough room to attach a finger stop to prevent hand overtravel unless you install one of those CAI folding grip things they made for Glock SBRs.
Which gets to the question... why not just build a Glock 17 SBR? Yes it is not as sexy as an Italian handgun but it would be infinitely cheaper, offer you far more options, keep the same general footprint as a 93R and be so much simpler to make with literally tons of prefab, snap on stocks and parts to choose from.
Not to just totally piss on your parade but I've gone down the road you are looking to go down... it is long, winding, ridiculously expensive and inevitably leads back on itself. The 93R's are unique beasts that have never had an adequate clone on the market, kind of like a Walther MPL or a Beretta M12... they are just really really REALLY difficult to clone... and the difficulty is just made twice as hard when there are cheaper, more common options on the table for that footprint of weapon. I've handled and fired a real 93R. They are clunky to shoot, about as accurate as throwing the bullets down range, the stock is uncomfortable as hell and the whole thing is better appreciated as a wall hanger or safe queen than as a legitimate small arm. I've also shot my dealer's Glock 18 with vert grip and stock and feel the same way about it. Machine pistols went the way of the dodo for good reason and they really only exist as novelties now. Sure, everyone wants a novelty every now and then and lord knows half or more of my own personal gun collection are novelties (I can feel my PS90 SBR in my safe sighing as I type this). Just know that you are walking down a very long road chasing a 93R clone unless you have mad gunsmithing skills and access to a hidden 93R parts cache no one has found yet.
On the flip side of your coin a CZ Scorpion SBR can be had for like $1200 with stamp right now ($800 gun, $200 stock kit and $200 stamp), all of it plug and play and most likely in high numbers when the parts start shipping. I own a Scorpion and have my form 1 back on it. It is a nice gun... a little plasticky for my tastes (I still prefer my HK K guns to it) but a solid shooter.
In the end it is all up to you, I'm not being a dick I just want you to know what you are potentially getting yourself into.