PDW builds - Lets see them, and share results

Claven2 said:
Are there sub-sonic 5.56 loads for pistol gas systems?
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None that I'm aware of. If there is, it's definitely not published data. Sub 5.56mm is a waste of time anyway. If you want to shoot .22 cal. bullets at rimfire velocities - just shoot rimfire. :D

I tried some in my LTR and afterwards I couldn't help but wondered why I tried except for the ####s & giggles factor. It was entertaining for 5 minutes and then it became old - fast. lol
 
Suputin said:
And hence the reason I will never buy anything from RA, he doesn't know what he is talking about. Barrel length has sweet FA to do with it. The important factor is the length of the gas system. Subsonics require a short pistol length has system to work properly. You could run subsonics through a 20" barrel Reliably as long as the gas system was pistol length.
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You are correct that barrel length has sweet F'all to do with it, of course any one who read what I wrote would probably would had figured out Alex's testing was probably done with corresponding barrel and piston length. ;)
 
Claven2 said:
Are there sub-sonic 5.56 loads for pistol gas systems?
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There is no subsonic 556 that will operate any semi-auto that I am aware of.

Subsonic 556 is a total waste of time and potentially dangerous as it is easy to stick a lightweight bullet in a full length barrel. Ask me how I know that. :(

Firing a round with a stuck bullet will instantly ruin your day.
 
2bad4u2 said:
I think you might want to check your facts on the subsonic round being designed for supressor use only. I don't believe that to be the case.

If it was Alex Robinson doing the tests it would be on his own rifles. He has nothing to gain from testing AR's.
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I never said it was designed for suppressor use only, but I believe that's what it was optimize for. Am I wrong?

Like I said, it should work suppressed or unsuppressed. This is on Noveske's website for one of their .300 blackout rifles:

The Noveske 300 AAC BLACKOUT is designed to run optimally firing both subsonic suppressed and supersonic unsuppressed, while keeping supersonic suppressed reliable. It may not reliably cycle the action under adverse conditions with subsonic ammunition unless a silencer is attached. We recommend supersonic ammunition for Military, Law Enforcement, and Self Defense use without a silencer.
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So maybe I am mistaken, and Noveske optimized their rifles for this. Not AAC and their ammo. If this is the case, then I stand corrected!
 
2bad4u2 said:
So, you're going to pay that much money for a rifle only to shoot s**tty corrosive ammo through it? Why? It's like buying a thoroughbred race horse and feeding it field grass.
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There's no way I would buy a 7.62x39 rifle and not shoot surplus out of it.

If you read my above post with my chrony results of the "####ty corrosive ammo" you post about, you will see that for surplus Czech ammo, it was quite consistent.

Corrosive ammo is a non issue if you clean your rifle properly after your range session. It literally takes me less than 10 minutes to properly clean my VZ.
 
Clobbersauras said:
There's no way I would buy a 7.62x39 rifle and not shoot surplus out of it.

If you read my above post with my chrony results of the "s**tty corrosive ammo" you post about, you will see that for surplus Czech ammo, it was quite consistent.

Corrosive ammo is a non issue if you clean your rifle properly after your range session. It literally takes me less than 10 minutes to properly clean my VZ.
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Worst come to worst, just spray down all the parts contacted by the gunpowder with windex. The ammonia neutralizes the salts, so corrosion shouldn't happen.

This is for the lazy folks :D
 
kthomas said:
I never said it was designed for suppressor use only, but I believe that's what it was optimize for. Am I wrong?

Like I said, it should work suppressed or unsuppressed. This is on Noveske's website for one of their .300 blackout rifles:



So maybe I am mistaken, and Noveske optimized their rifles for this. Not AAC and their ammo. If this is the case, then I stand corrected!
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By its very nature the use of subsonics are optimized with a supressor are they not? The factory ammo was designed to work in both with and without a silencer. It has to be designed that way.
 
Clobbersauras said:
There's no way I would buy a 7.62x39 rifle and not shoot surplus out of it.

If you read my above post with my chrony results of the "s**tty corrosive ammo" you post about, you will see that for surplus Czech ammo, it was quite consistent.

Corrosive ammo is a non issue if you clean your rifle properly after your range session. It literally takes me less than 10 minutes to properly clean my VZ.
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My comment was in reference to corrosive ammo, not surplus in general.

If you want to shoot it, that's your business. Personally, I'd probably shoot corrosive in a VZ as well. It's not much of an investment to protect. Probably the only weapon other than a SKS that I'd consider doing so.

For a $2,000+ AR, I think I could afford to be a little more selective.
 
ANyone want to shoot out a quick answer? BEtter (price/value) to custom build from scratch a 5.56 7.5 or buy a nea one and vltor or magpul it up? I'll be honest, it's mainly a safe queen / zombie defender.

I'd like to keep it under $1500ish.. I love the PWS Diplomats at QUestar, but I can't do $3000 while I'm trying to convince the wife that I need a .50.
 
kthomas said:
Worst come to worst, just spray down all the parts contacted by the gunpowder with windex. The ammonia neutralizes the salts, so corrosion shouldn't happen.

This is for the lazy folks :D
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I was given a good trick by a local gunsmith.

After shooting corrosive, he shoots about 10-15 rounds of non-corrosive ; the heat from the last rounds burns the salts, and no corrosion takes place.

He's done it for years, never had corrosion problems.
 
The Noveske 300 AAC BLACKOUT is designed to run optimally firing both subsonic suppressed and supersonic unsuppressed, while keeping supersonic suppressed reliable. It may not reliably cycle the action under adverse conditions with subsonic ammunition unless a silencer is attached. We recommend supersonic ammunition for Military, Law Enforcement, and Self Defense use without a silencer.
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What this means is that Noveski used a minimal sized gas port to control bolt carrier velocity when using supersonic ammo but that would also work with subsonics when the gun was reasonably clean. Get the rifle overly dirty and subsonics may not cycle 100%. This is a sacrifice made to avoid the need for an adjustable gas block.

If the gas port is opened up a wee bit the rifle will run fine subsonic and supersonic. The only downside being a bit of extra bolt velocity. Considering that many AR's are wildly overgassed and have been for years if not decades I don't really see the problem. If it really bugs you, just use a slightly heavier buffer for supersonics.

I have my Whisper AR's set so they will cycle both subsonics and supersonics without the need to adjustable gas block and I haven't had any cycling problems.
 
Suputin said:
What this means is that Noveski used a minimal sized gas port to control bolt carrier velocity when using supersonic ammo but that would also work with subsonics when the gun was reasonably clean. Get the rifle overly dirty and subsonics may not cycle 100%. This is a sacrifice made to avoid the need for an adjustable gas block.

If the gas port is opened up a wee bit the rifle will run fine subsonic and supersonic. The only downside being a bit of extra bolt velocity. Considering that many AR's are wildly overgassed and have been for years if not decades I don't really see the problem. If it really bugs you, just use a slightly heavier buffer for supersonics.

I have my Whisper AR's set so they will cycle both subsonics and supersonics without the need to adjustable gas block and I haven't had any cycling problems.
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Ah, gotcha! Thanks for the info!
 
Just finished my build tonight!

Not too sure if 9mm ARs falls under the PDW category!

vAyuhl.jpg


- Aero Precision Lower w/ Spikes 9mm Magwell
- Vltor EMod Stock
- Spikes Upper w/ 9mm Ramped BCG
- 7" 9mm barrel
- YHM 7" Diamond Forarm
- Magpul RVG
- Spikes fake can
- Missing - BUIS
 
kthomas said:
I like! Nice, simple and clean, definitely a ###y gun!
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Couldn't agree more. Too bad it didn't enjoy a little more colour.

Question. Why is it you rarely see a rifle with Magpul gear in colours other than black or FDE? I don't believe I don't think I've seen a green furnitured carbine in this thread. A dark brown would look good if they offered it.

With the "Zombie" craze in full swing with Hornady's Zombie Ammo, and Eotech releasing a zombie themed model, when do you think we're going to see some kind of neon green/yellow accesssories released from Magpul? lol
 
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