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Thread: 7.5 inch AR-15 reliability

  1. #61
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    Having shot a Noveske Diplomat a week ago: I made a list of reasons NEVER to carry one over a Mk. 18.

    1.) MUZZLE BLAST. Holy ****. My sinuses hurt. Using an A2 FH. And that was outside using my SureFire hearing protection. My ears were ringing anyway. I can only imagine shooting that indoors, or in a car. Never.

    2.) Ballistics. I'm not chancing my 77 gr. ammo not working the way it's supposed to.

    3.) Reliability. Even the Noveske Diplomat had issues, and got really dirty really quick. Not to mention we had to lube it every 300 rounds or so. LMT lower, and BCG.

    4.) Recoil. Not soft shooting at all, the gun slams around really bad.

    5.) It chipped my damn H2 buffer!

    6.) No suppressor warranty. Sorry that's a no-go for me.

    7.) Bullets like a rainbow. Good luck going past 200m if.

    8.) Buy a real PDW caliber. 6.8x43mm/ or 6x35mm if it was available. I'd invest in an LMT or LWRCi 8'' kit.

    9.) You're not part of a tank crew or PSD unit. What do you plan on using this for?

    10.) It sucks to shoot next to a guy using one. A 7.5'' with Ops Inc. suppressor is just as loud as an unsuppressed 10.5''.

    11.) A Glock 17 with 33 round magazines can probably do the same thing within 100m or so. And I'd be willing within 50m the Glock can do it better.
    We miss you, AC.
    We miss you, ToddG.

  2. #62
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    Quote Originally Posted by Magic_Salad0892 View Post
    Having shot a Noveske Diplomat a week ago: I made a list of reasons NEVER to carry one over a Mk. 18.

    1.) MUZZLE BLAST. Holy ****. My sinuses hurt. Using an A2 FH. And that was outside using my SureFire hearing protection. My ears were ringing anyway. I can only imagine shooting that indoors, or in a car. Never.
    I don't have a problem with the Levang in the open. Inside, muzzle blast sucks without a can. It does with a 10.5" too.

    2.) Ballistics. I'm not chancing my 77 gr. ammo not working the way it's supposed to.


    3.) Reliability. Even the Noveske Diplomat had issues, and got really dirty really quick. Not to mention we had to lube it every 300 rounds or so. LMT lower, and BCG.
    What? Noveske Unreliable? My Rainier has never balked. Even shoots Wolf

    4.) Recoil. Not soft shooting at all, the gun slams around really bad.
    I don't find recoil worse than my 10.5". I use a FA BCG and H2 or 9mm buffer



    5.) It chipped my damn H2 buffer!
    Never had it happen on either of mine. Sorry for the bad luck.

    6.) No suppressor warranty. Sorry that's a no-go for me.

    7.) Bullets like a rainbow. Good luck going past 200m if.

    8.) Buy a real PDW caliber. 6.8x43mm/ or 6x35mm if it was available. I'd invest in an LMT or LWRCi 8'' kit.
    That would be a great option if ammo wasn't so expensive. And the 6.8 is still very loud

    9.) You're not part of a tank crew or PSD unit. What do you plan on using this for?
    Clearing houses, rooms, home defense. It's still a rifle round traveling at 2000 fps and with proper ammunition, does not over penetrate


    10.) It sucks to shoot next to a guy using one. A 7.5'' with Ops Inc. suppressor is just as loud as an unsuppressed 10.5''.
    I can fire mine suppressed with a SAS .308 can without EP in the open. About as loud as a .22LR. Certainly isn't as loud as an unsuppressed 10.5". If that's the case, you need a better can.

    11.) A Glock 17 with 33 round magazines can probably do the same thing within 100m or so. And I'd be willing within 50m the Glock can do it better.
    Rifle round will always beat a hand gun round. Will that 9mm defeat body armor? The 5.56 will

    A 7.5" 5.56 is not the ideal HD weapon by any means. Inside a house, I would more likely use my Glock.
    But except for the blast, I don't buy the rest as a reason not to use it if it's what you have.
    Plenty accurate to 100 yards.
    Short barrelled ammunition would help with the concussion and blast.
    Trust me, a 9mm is also loud in an enclosed room.
    It's not what I would recommend for HD but I'm not convinced it wouldn't serve the purpose, with the exception of decibals.
    Dave
    Last edited by shadow65; 01-14-11 at 17:07.
    Independent Field Testing/R & D

    Better to die for something than live for nothing

  3. #63
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    Quote Originally Posted by Magic_Salad0892 View Post
    3.) Reliability. Even the Noveske Diplomat had issues, and got really dirty really quick. Not to mention we had to lube it every 300 rounds or so. LMT lower, and BCG.
    What issues did it have other than getting dirty and requring lube more often than a longer upper?

  4. #64
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    None. Just that.

    Issues would have been the buffer problem, and the excessive fouling.
    We miss you, AC.
    We miss you, ToddG.

  5. #65
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    Quote Originally Posted by justin_247 View Post
    Can somebody please tell me the utility of this short of a barrel? The only reason one needs to go that short is because of the design of the AR in the first place (the buffer is behind the carrier instead of above it, which means you can't use a folding stock).

    10.5" is already loud as heck. I can only imagine how insane this would be in a vehicle - I'm sure you'd destroy your ear drums as you try to shoot out the window, unless you had a KX3 directing the blast forward, but even then it would be loud.

    With the KX3, the overall weapon length with the stock retracted is about 25".

    For 5.56, I would much rather run a SCAR-CQC (21" overall length with stock folded) with an M4-2000 (adding 5.1" to the length).

    Much better would be an MP-5, I would think.
    Both those are cool guns.... but as far as length goes...

    Stock folded length - 27.2


    16 inch barrel Krinks are even shorter...

    That said, I would love to own a 8 inch 6.8 SPC LWRC PSD upper for my AR.
    Last edited by fhpchris; 01-14-11 at 21:48.
    USMC vet.

  6. #66
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    Quote Originally Posted by fhpchris View Post
    Both those are cool guns.... but as far as length goes...

    Stock folded length - 27.2


    16 inch barrel Krinks are even shorter...

    That said, I would love to own a 8 inch 6.8 SPC LWRC PSD upper for my AR.
    Yep, you nailed it with the AK. If you're aiming for a "short" weapon with a decent barrel length, a piston-based weapon with a folding stock is the way to go. An AK would be the easiest route...

  7. #67
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    Quote Originally Posted by GTF425 View Post
    Please post your credentials. No carbine classes or tacticool mumbo jumbo; I want to know the last time you killed someone with real world super scary gun bullets. Otherwise, knock the "killing people" shit off.

    PS- Show me a shooter on a PSD or entry team who carries a "break contact SBR" and a "real SBR" while on the job. That made my night.

    I really want to see a response to this but I feel its just not going to happen.
    Omi R.

  8. #68
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    I'm trying out a 7.5" piston upper to see if it helps with the dirt issue.
    Independent Field Testing/R & D

    Better to die for something than live for nothing

  9. #69
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    Quote Originally Posted by scottryan View Post

    Using a gun like this in training is fooling yourself. It has too much muzzle blast and not enough lethality.
    Really? Not enough lethality? I have never said the 7.5" is the gun to use at 150 yards but I guarantee you that my 7.5" AR will be plenty lethal. The way I have it setup for HD, suppressed, I guarantee you it will cause more damage then my G19. Whenever you want to test if for yourself just come into my house uninvited one night.

    ETA: most importantly, it WILL penetrate body armor.

    Quote Originally Posted by scottryan View Post
    You need a regular length SBR for real world use to kill someone in the real world.
    As asked elsewhere, what real world experience do you have?
    Last edited by miamitj; 01-16-11 at 12:43.
    Omi R.

  10. #70
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    Quote Originally Posted by Sry0fcr View Post
    It's a niche weapon system to be sure within that niche 3" less of OAL might be worth the tradeoff in the cramped confines of a vehicle or for the ability to stuff it under a coat. Not everyone is an infantryman or security contractor in some 3rd world shithole expecting to get ambushed by dudes with RPGs and AKs. From what admittedly little ballistic testing data I've seen the right 5.56 load (not ****ing FMJ) should still do the job within typical SD or LE distances (i.e. within 50yds). No it's not optimal, but optimal is a moving target depending on what you're doing. Mission drives the gear right?

    Also, you can get your point across without being combative and condescending but if you're going to do it anyway at the very least let the rest of us in on your resume & extensive real world experience so we can put your [obviously strong] opinion into a frame of reference.
    Well said, let see if you get a response on the last one ...
    Omi R.

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