1st off the Scar mod 2 is based off of the XM8 (a gun once in the running to replace the M16, failed to make the cut) Check this: http://fc02.deviantart.net/fs27/i/2008/069/8/b/XM8_Finished_by_AlphaMike1.jpg
2nd the Grendel is based off of a version of the ACR, looks wise:
http://www.xcrforum.com/forum/attachments/964-can-t-wait-remington-acr-acr3.jpg
or the Magpul Massaud: 7.62x51mm NATO:
http://www.imfdb.org/images/thumb/e/e3/Magpul_Massoud.jpg/500px-Magpul_Massoud.jpg
3rd the Typhoon is based off of this concept: http://youtu.be/xe-QP8s1ZJc
watch the whole vid and u'll get the idea
4th: the FY71 is modeled after: the well known, AK-47 which is standard 7.62mm but with some research is chambered with a 5.45x39mm instead,
http://www.imfdb.org/images/thumb/f/f8/AK-74_NTW_12_92.jpg/600px-AK-74_NTW_12_92.jpg
4th again: the FY71M makes a short appearence in the Crysis Series and conviently is modeled after the AK-47M, notice the M in both? lol where as the regular FY71 doesnt have a M n both, how clever
http://www.imfdb.org/images/thumb/7/7f/AK-74M.jpg/400px-AK-74M.jpg
also the FY71M resembles the Norinco QBC-003:
http://www.imfdb.org/images/thumb/8/8b/QBZ-03.jpg/400px-QBZ-03.jpg
The Sniper Rifle DSG-1 greatly resembles the DSR-Precision GmbH DSR-1
check it: http://www.imfdb.org/images/thumb/7/77/Dsr1.jpg/500px-Dsr1.jpg just a whole lot shorter by look, don't kno much about the actual sniper rifle.
Gauss Sabot Rifle resembles the Walther WA 2000 .300 Win Mag closest
http://www.imfdb.org/images/thumb/7/73/Walther-WA2000.jpg/500px-Walther-WA2000.jpg
Finally the shotguns,
The Alpha Jackal resembles the Hawk Semi-Auto Tactical, 12 Gauge, cept the Alpha Jackel really isn't semi-suto
http://www.imfdb.org/images/thumb/7/70/Hawk-Semiauto.jpg/500px-Hawk-Semiauto.jpg
The Marshall, (My fav gun in the game) resembles the commonly known military shotgun the USA uses which is the Italian made Benelli M4 Super 90 with 7-shot tube - 12 Gauge
http://www.imfdb.org/images/thumb/3/32/M4Super90.jpg/550px-M4Super90.jpg
Im getting tired of doing this but ill do the Feline and the K-Volt **** here they are
The Feline resembles the FAMAS F1 FELIN with SCROME J4 scope - 5.56x45mm, FELIN to FELINE get it?
check da pic http://www.imfdb.org/images/a/af/FamasFelin.jpg
And the K-Volt resembles the TDI Vector - .45 ACP which is in a few FPS like Far cry 3 and i think BLOPS 2
but also has elements of the well known bullpup smg the P90 in it as well combine these 2 pics, and u get the k-volt, or some real weird shizzz
http://www.imfdb.org/images/thumb/3/32/Krisssuperv.jpg/400px-Krisssuperv.jpg
http://www.imfdb.org/images/thumb/9/9e/FNP90Side.jpg/400px-FNP90Side.jpg
Okay thats it, so much for only doing a few of em, wait ****, i forgot about the handguns ugghhh, here they are quickly:
Hammer II=Desert Eagle stopping power, Hammer II=Beretta 92FS INOX - 9x19mm by the slide and barrel
Hammer II=Kimber Stainless Target II with target sights - .45 ACP which is like a very modernized M1911, which is my favorite pistol of all time
A couple of pics of real life guns that resemble the Hamburger II
http://www.imfdb.org/images/thumb/4/49/Beretta-Inox.jpg/350px-Beretta-Inox.jpg thats the Beretta 92FS INOX
http://www.imfdb.org/images/thumb/9/9e/KimberSSTargetII.jpg/350px-KimberSSTargetII.jpg which is the M1911 variant
Okay the Nova 12 is similar to the HK (Heckler and Kosch) UCP http://www.imfdb.org/images/thumb/1/13/Hk_ucp_3.jpg/450px-Hk_ucp_3.jpg
also similar to the Wather P99 http://www.imfdb.org/images/thumb/0/04/Walther-P99-Pistol.jpg/450px-Walther-P99-Pistol.jpg
Okay screw the other 2 pistols, what is your opinon on what the Majestic and the AY are similar to? Plz Reply it took forever for me to type this up, k THX!!