사실 제가 뭐라뭐라 길게 할 필요도 없습니다. 종말탄도학계의 2번째 본좌이신 Dr. Gary Roberts가 M4Carbine.net에 올린 글로 대신하죠.

http://www.m4carbine.net/showthread.php?t=19913

주목할 부분:

"Several papers have described the incredibly poor terminal performance of the 5.7 x 28 mm projectiles fired by the FN P90:

--Dahlstrom D, Powley K, and Gordon C: “Wound Profile of the FN Cartridge (SS 190) Fired from the FN P90 Submachine Gun". Wound Ballistic Review. 4(3):21-26; Spring 2000.
--Fackler M: "Errors & Omissions", Wound Ballistic Review. 1(1):46; Winter 1991.
--Fackler M: "More on the Bizarre Fabrique National P-90", Wound Ballistic Review. 3(1):44-45; 1997.
--FBI Academy Firearms Training Unit. FBI Handgun Ammunition Tests 1989-1995. Quantico, U.S. Department of Justice--Federal Bureau of Investigation.
--Hayes C: “Personal Defense Weapons—Answer in Search of a Question”, Wound Ballistic Review. 5(1):30-36; Spring 2001.
--Roberts G: “Preliminary Evaluation of the Terminal Performance of the 5.7 x 28 mm 23 Grain FMJ Bullet Fired by the New FN P-90 , Using 10% Ordnance Gelatin as a Tissue Simulant”, AFTE Journal. 30(2):326-329, Spring 1998."

- 신나게 까이는 5.7mm

"The P90 can definitely penetrate soft body armor, but then so can 9 mm AP rounds. The greater momentum of 9 mm bullets allow them to defeat vehicles and other intermediate barriers better than the 5.7 mm bullets. Standard 9 mm, .40 S&W, and .45 ACP JHP loads crush more tissue, offer ideal penetration, and are equally likely to not exit the opponent as the 5.7 mm. 5.56 mm and 6.8 mm weapons offer significantly superior terminal effects compared to 5.7 mm. Bottom line—what does the P90 offer that is not already available?"

- 9mm AP에 비해 나은 점이 없음. 9mm AP는 중간 장애물을 더 잘 관통함. (인체도 더 잘 박살내고)

"Below are comments specifically on the MP7 by a combat experienced senior SOF NCO currently serving in the U.S. military:

Quote:
'When employing the MP7 up close, you literally use it like a fire hose and sprinkle 4.6 all over the torso of the guy you want to reduce (usually on Auto, which is a CQB no-go anyway), and you have to keep hosing him down with bullets until his brain figures out that you are filling him in. Usually this takes longer than shooting a NSR with a rifle, so by the time that your brain figures out that the guy has quit and is crumpling, you are almost out of bullets and any other threats in the room have most likely started to engage you. IF your team is on their **** and everyone grasps the true importance of primary/secondary sectors of fire, then perhaps you can get in there and all of your guys can sprinkle 4.6 liberally on all of the bad guys in an efficient manner, but if you fail to do that, then bad things will happen quickly.'"

- 실전을 겪은 미 SOF 부사관의 증언(NSWDG 등이 MP7을 사용하고 있죠). 보통 풀오토로 탄창을 흉부에 호스로 물뿌리듯이 거의 하나 다 부어넣어야 적이 쓰러짐. 그리고 그럴 때쯤이면 다른 놈들이...

"A decorated, experienced SWAT officer at a U.S. LE agency that has had multiple OIS incidents with 5.7 mm FN P90's has written the following--note that his comments equally apply to the 4.6 mm MP7:

Quote:
'The 5.7 pistol as a carry gun is a mistake. There are far more effective weapons and ammunition combinations out there. The only factor that comes close to equalizing the P90 (not the 5.7 pistol) is it's full auto capability: 900 rpm of very controllable fire. Even this advantage is limited to close-in, CQB type engagements. I can put more rounds on target faster with the P90 than with my M4 in close contact engagements. Unfortunately you may HAVE to put more rounds in the threat due to the lack of damage the projectile causes. The 5.56 is far more effective at getting the attention of men than 5.7 mm. This is not speculation. We have been using 30 P90's for five years now. There have been multiple BG's shot with them. We will not be buying more 5.7 mm or other small caliber PDW systems'"

- P90을 사용해 여러 번 총격전을 거친, 미 법집행기관의 SWAT 대원의 코멘트. 5.7mm의 저지력이 너무 저질이라 이걸 권총으로 운용하는 건 절대 실수. P90 30정을 5년간 운용해왔고 용의자를 여러 번 쐈음. 더 이상 5.7mm나 비슷한 PDW는 구매하지 않을 것임.

"As a result of poor terminal performance, a large Federal agency is also no longer running P90’s like they used to. Likewise, some military units that tried small caliber PDW's in combat are procuring other options, like 9" .300 Blackout uppers to run on M4 lowers."

- 아마도 USSS를 말하는 듯.

"With the data now available, a U.S. LE agency would have to be woefully ignorant or colossally stupid to purchase the MP7 (or P90) for SWAT use given the numerous weapon systems available for LE SWAT/CQB use that are both better and more cost effective than small caliber PDW's."

- 그리고 결정타. "woefully ignorant or colossally stupid"