<blockquote id="quote"><font size="1" face="Verdana" id="quote">quote:<hr height="1" noshade id="quote"><i>Originally posted by Harley</i>
<br /><blockquote id="quote"><font size="1" face="Verdana" id="quote">quote:<hr height="1" noshade id="quote"><i>Originally posted by azsarge</i>
<br /><blockquote id="quote"><font size="1" face="Verdana" id="quote">quote:<hr height="1" noshade id="quote"><i>Originally posted by Harley</i>
[brHK MP5SD3 Navy lower, suppressed full-auto
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Also known as the SD6 in the airsoft world. (For reasons that are still beyond me)[
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I had the chance to fire an SD2 with SEF group a long while ago. Fun Times![}:)]
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For the same unknown reason why Marui labels their M4 as an A1 when in fact it's an A3.
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The Marui gun is indeed an M4A1. There is no rifle in US inventory with the designation M4A2/A3/etc. Now, mind you, civilian designations are different, and are SOMETIMES indicative of the trigger group (lower), but the Military does it differently. It goes in sequence, whatver changes are made are labled as the next sequential number (ie, the next M4 variant, no matter the changes, will be the M4A2). Civilian variants are all screwed up numerically, with M4gery's, M15's, AR15's, SR16's, uppers, lowers, pre-ban, post-ban, and all kinds of god-awful legal restrictions on firearms. It all makes for one FUBAR designation system. It cannot be done systematically, nor objectively. There are too many variables.
As far as weapons are concerned, I could care less about civilian firearm designations. If it's Military I will call it by what it is (M4A1, M16A4, etc). If I buy as a civvie, its JUST an AR15.
Now, about that Marui. The traits of Safe/Semi/Full lower, flattop upper reciever, etc denote it as an M4A1. The 14.5 inch, notched, 1/7 twist barrel, double heat shield forward handgrip is what makes it an M4. The original M4 (non A1, referred to as the Model 720) had these same characteristics, but with a fixed carry handle (most of the time), and A2 style sights. The Model 720 was sometimes referred to as the M16A2 Carbine, due to it's similarities, one of which was the shared reciever. Of course the M16A2 has a 3-round burst limiter, as did the Original M4 (Model 720). The later model, the M4A1, had full auto capability. Some versions of the M4 was fitted with a flattop reciever, but was made standard for A1 variants. Hell, I have even seen 733's with flat-tops. Oh, and there was a Model 723 that used the M16A1 reciever, but not many existed, so I won't go into that. My point is that all rifles have thier own designations. Some are similar, but some aren't. The M4A1 designation is somethng marui got right.
Now, while I'm at it (fell free to correct me):
MP5 A1-safe/semi/full trigger group. No stock.
MP5 A2-safe/semi/full. Fixed stock.
MP5 A3-safe/semi/full. Collapsible stock.
MP5 A4-safe/semi/3 rd/full. No Stock.
MP5 A5-safe/semi/3 rd/full. Fixed Stock
MP5 A6-safe/semi/3 rd/full. Collapsible stock.
The SD series corresponds with these. No difference if the A1-A3 is labled as SEF, instead of the pictoral labels. The airsoft designations are completely screwed up, and I cannot for the life of me figure out what the heck they were thinking. Also, due to the lack of 3 rd burst MP5 weapons in airsoft, nothing over A3 (or SD3) exists [in airsoft], despite the incorrect AEG lables. As far as I know, the designations are the same for all MP5 weapons, whether they are in civilian or military use. This excludes the MP5 SF, which is Single Fire (not Special Forces). An MP5 Navy is simply a A2 or A3 with a special Flash Hider (and other small, mainly internal, differences). Now, I could be wrong, or be excluding something. This info is the result of my thirst for the truth, and is a result of hours of cross-referencing my numbers. It's not just from one book or website. John, you owned one. Whats your input?
I know better than to argue with someone about civilian firearms (especially YOU, John!), but military hardware has always interested me. I am pretty sure the info presented here is sound. Feel free to correct me if it is anything but.
Cheers, and I'm out!