The firearm thread

[jasonu]

Quality H&K 5.56 mag

[jasonu]

Full auto M16 for sale.
http://www.sturmgewehr.com/webBBS/nf...gi?read=172130

[Swoop]

16 April 2015: The U.S. Marine Corps is going to switch to hollow point rifle and pistol ammunition.

Actually SOCOM (Special Operations Command) and the Marines have been using hollow tip bullets for over a decade, mostly in Afghanistan and, for SOCOM, worldwide. This use of hollow point, rather than full metal jacket ammo, began with pistols. SOCOM experimented and found that a full-metal jacket 9mm round has a one-shot stop rate (OSSR) of 70 percent, while the best 115-grain 9mm hollow point has a one-shot stop rate of 91 percent. OSSR is largely just a way to measure the relative stopping power of different (in terms of calibre, design and weight) bullets and forcing the target to drop because of death or incapacitation.

Much depends on where you shoot someone and SOCOM found that the highest OSSR was achieved with a .45 calibre (11.4mm) pistol firing hollow point bullets. That gives you something like .99 OSSR and the OSSR stays high no matter where you hit someone. Basic OSSR is calculated assuming a hit in the centre of mass. It was long known that hollow point does more damage but lots of battlefield experience since September 11, 2001 made it clear that hollow point ammo was a key tool in limiting the effectiveness of Islamic terrorists.

There is a popular and long-standing myth that hollow point bullets (that expand on hitting and create larger and more damaging wounds) are illegal according to the Geneva Convention. That treaty does not mention bullets. The later 1899 Hague Convention does and it prohibits some types of hollow point bullets. The U.S. never signed the Hague Convention and was never bound by it. But in deference to allies who did sign American forces have rarely used hollow point bullets. One frequent exception was for certain types of commando operations, like hostage rescue. No allies ever complained about this.

Shortly after 2001 SOCOM and the marines, responding to complaints from troops that the standard 5.56 and 9mm full metal jacket bullets were not doing enough damage to stop fanatical Taliban fighters, began issuing hollow point bullets and troops were satisfied with the improved stopping power. As a result the Marines are going to switch over to the MK318 hollow point (or “open tip”) round for its assault rifles and machine-guns. The existing M855 full metal jacket rounds will be used up in training exercises. SOCOM has also switched to hollow point for pistols (9mm and 11.4mm) and rifles. The army is watching all this carefully.

[scumdog]

For once NZ Police were ahead of the game when it came to the value of hollow-points!

[scumdog]

Having problem with my Gevarm A-7 not ejecting consistantly, any of you gun-gurus on how the fix this?

BTW: The 'ejector' is the left lip on the magazine in these rifles. (in case you are not aware...)

[Akzle]

Having problem with my Gevarm A-7 not ejecting consistantly, any of you gun-gurus on how the fix this?

BTW: The 'ejector' is the left lip on the magazine in these rifles. (in case you are not aware...)

modify the cunt to full auto.




all ammoes or just some?

[jono035]

Having problem with my Gevarm A-7 not ejecting consistantly, any of you gun-gurus on how the fix this?

BTW: The 'ejector' is the left lip on the magazine in these rifles. (in case you are not aware...)

So it's extracting the case ok but not ejecting it? The case is then getting hung up when it feeds the next? Tried different (hotter) ammo? Also, could be that the chamber (or bolt/receiver) is a bit manky and needs a clean?

I've got a Gevarm sitting around somewhere but I don't have a proper mag for it so I can't really help in that regard.

[scumdog]

modify the cunt to full auto.




all ammoes or just some?

I did that in 1974,

Didn't improve the kill rate so changed it back.

'all ammoes' as you say.

[scumdog]

So it's extracting the case ok but not ejecting it? The case is then getting hung up when it feeds the next? Tried different (hotter) ammo? Also, could be that the chamber (or bolt/receiver) is a bit manky and needs a clean?

I've got a Gevarm sitting around somewhere but I don't have a proper mag for it so I can't really help in that regard.

I get a few stove pipes, the odd time the empty sits back far enough to hold the bolt back.

[Akzle]

I get a few stove pipes, the odd time the empty sits back far enough to hold the bolt back.

whu??

innt it an open bolty??

[scumdog]

whu??

innt it an open bolty??

Not the A-7

[jono035]

Not the A-7

Just checked and it's an A6 that I've got here.

I'm not familiar with the A7s. Do they have a normal claw extractor or just a flat boltface like the A6s?

If the case is getting wedged at the back then it's cycling fully, but might not be maintaining enough bolt speed to let the case kick out fast enough.

Do you notice it happening any more often with subs? You could try a good soak with WD40 and see if that lowers how often it happens. If that changes it then that'd be bolt speed. I guess if the spring has gone a bit weak then it could be bouncing at the end of its travel and kicking forward faster than it should. I guess that'd mean it'd be better with subs or a manky bolt, in which case I'd just end up confused.

[Akzle]

then how did you full auto

is the mag seating properlike?

[carburator]

So it's extracting the case ok but not ejecting it? The case is then getting hung up when it feeds the next? Tried different (hotter) ammo? Also, could be that the chamber (or bolt/receiver) is a bit manky and needs a clean?

I've got a Gevarm sitting around somewhere but I don't have a proper mag for it so I can't really help in that regard.

Had one through work recently same issue.
A good strip and clean is the first thing to look at.
Generally all 22lrs that come across the bench for this issue is cleaning and improper lubrication.
one thing I have found with guns that have fired thousands of rounds is they do tend to peen
the chamber face, sometimes a chamber reamer by hand removes a couple of tens and just
lessens drag on extraction.

[scumdog]

then how did you full auto

is the mag seating properlike?

Ah, I own more tham 1 Gevarm Rob!

And yeah, mag seats proper, the rifle hasn't had that many rounds through it.