4 hours ago, nunya said:

You said "children." So that means you have more than one? And I'm sure you love each one in their own way. They're very similar, but one's a little shorter than the other? They're different, but both very special to you, and there's no way you could choose one over the other and having multiple enriches your life. I know I could never choose just one. Child, that is. Of course.

Well right now the house is on fire and I need to decide which one to save first...

13 hours ago, Lord Ratner said:

Well right now the house is on fire and I need to decide which one to save first...

You got two arms and two hands, right? Both at the same time, obviously!

Of course we're zero help, but if I had to pick one child, er, MP5, it'd be the shorter one. 9mm isn't going to need the longer barrel. The increase is minimal and I'd rather save the several inches for the suppressor and keep it more compact.

I think Zenith has a couple shorties. 4 and 5 or something. Between those, I would take the longer 5", but not the 8-9" options.

Edited 6 hours ago6 hr by nunya

Either a SD clone (hide the suppressor attachment under the handguard)

OR.. Make it look like the Iranian embassy SAS guns.

On 1/19/2026 at 10:45 PM, Lord Ratner said:

MP5 or MP5K? Either will be a clone, but I am having more trouble with this decision than I had naming my children.

Either will be suppressed.

I don't care for the MP5K. Yes the stock extends but it feel like a front heavy pistol until you fully extend.

MP5SD for the win. The quietest gun I've ever shot which is a huge consideration if you are using this for home defense. The MP5 and MP5K are quiet up close but if you shoot beyond 20' feet the rounds will go supersonic and greatly increase the noise signature.

Break Break - On day 12 of waiting for my electronic Form 4s to clear...so much for a faster process.

38 minutes ago, ClearedHot said:

The MP5 and MP5K are quiet up close but if you shoot beyond 20' feet the rounds will go supersonic and greatly increase the noise signature.

What do you mean by this? Rounds don't accelerate once they leave the barrel. Are you saying if you use a lighter ammo for the longer range?

I'm thinking about an FRT because I think the MP5 platform is one of the most obvious choices for an FRT. So this will be a range toy, since there's no universe where I use an FRT for home defense. My biggest concern with the MP5 versus the mp5k is that the MP5 ends up being remarkably similar to the MCX Rattler. As I grow my collection I'm trying to bring in guns that offer a different shooting experience, not just a different name or caliber.

I'm also very average sized (that's what she said!), so the mp5k doesn't present the same ergonomics for me as it does for someone with a bigger build and gorilla hands. 😂🤣

I think with the vertical foregrip and a shorty suppressor, the mp5k will be a hoot to hand to someone at the range with a 30 round magazine of 9 mm. And I won't have to cry as I listen to the money flying out of the barrel at FRT speeds.

This video does a better job of showing it, I've seen it in person. Note when he shoots short and the rounds hit the dirt you don't get the supersonic "crack" but when he shoots the longer range target the bullet with the MP5 and the MP5K both allow the bullet to accelerate supersonic and thus a much louder noise signature. With the MP5SD 115 and 124 grain stay subsonic and the noise signature is GREATLY reduced. If you are using an FRT and this is a range toy you probably don't care. I use the SD and my MPX for home defense and sound is a big issue.

That's not the physics at play. The bullet is its fastest at the muzzle. The difference is the SD has a ported barrel to bleed gas and energy so it makes the 115s subsonic at the muzzle. My Thompson Machine 10-22 integrally suppressed barrel is the same way. The distance of the target doesn't matter.

You don't hear the crack of the 115s into the dirt from the other two simply because the pressure wave doesn't get back to your ear. It's still there.

Porting clearly visible here to make 115s subsonic:

Edited 1 hour ago1 hr by nunya