k*****G
发帖数: 697 | 1 哥几个没这么夸张了吧，9mm muzzle energy around 380 ft.lbs, 40S&W muzzle
energy around 370 ft. lbs. 怎么可能差这么远, 肯定打中了?.....lol |
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j*****g
发帖数: 223 | 2 没有打很多发，而且只有铁瞄，50y，总的印象很smooth, muzzle compensator超给力
，几乎没有recoil和muzzle rise |
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j*****g
发帖数: 223 | 3 没有打很多发，而且只有铁瞄，50y，总的印象很smooth, muzzle compensator超给力
，几乎没有recoil和muzzle rise |
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k*******n
发帖数: 5546 | 4 The United States is the center of gravity for all things tactical. The U.S
market represents 90% of the world market and because of this the world's
premier weapons manufacturers have set up shop here in continental United
States to sell their wears to the military, law enforcement agencies and
private citizens.
However, after world events such as 911 there has been a huge demand for
weapons in the U.S. This placed massive strain on quality control systems of
weapons companies as demand overtoo... 阅读全帖 |
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d*******s
发帖数: 15155 | 7 找不到之前的帖子了。
今天才知道muzzle brake就是compensator，那么我的m10装的就是这个了。难怪感觉枪
口上抬不多。
看了看介绍，原理就是利用火药燃气向后的反冲把枪口向前推来减少上抬，但噪音和枪
口焰会增加。
我的m10上的tapco这个，按buds网上介绍的是muzzle brake，但说带内置flash
hiddener，不知道什么原理? |
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k*******n
发帖数: 5546 | 8 AK muzzle brake可以试一试PWS 和 BattelComp
AR Brake选择就多了，SF BC PWS KAC AAC都是好东西, 不过我觉得一般5.56 AR用个消
焰器就好了，比如AAC SF Vortex YHM A2.
Muzzle brake太响太喷，开大洞焰火也小不了。 |
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p*****y
发帖数: 421 | 9 多普勒测试给出该子弹的实际mach - Cd 曲线，当然要进行计算转换，可以类似成很多
很多点BC。
其实你提到的多个BC，也就是认为一个BC不太好。
单点BC和多点BC是根据G1，G2...比例计算出Cd，我是测出Cd。
也举个例子：用一个BC，是奇瑞QQ，破是破点，但是能跑，还可以，比没有强。
你的多点BC，就是BMW，控制好的多了，可以说足够了
我用多普勒，算是保时捷911吧，一定更好，但好多少，提高的一部分，有没有必要，
就是仁者见仁了。但是做广告，可以说我们的板砖是用保时捷拖过来的。我们定位高端，
所以advertisement上应该是长坂。
对于都理解的东西，就像你开学术会议，两个大牛为一个理论争的不可开交。他们都理
解为什么，但是见解依然不同，争是没有结果的。求同存异，反而有助于进一步探讨。
我实践太少，到现在也是新手。来这个就是通过一些讨论，学习更多的东西。
等到多普勒数据做出来后，我对比下，看看实际差异倒底多大，到时候再继续讨论。也
许你对，也许我对，结果是大家都更明白了。退一万步讲，就算多普勒的数据更差，老
板也会用多普
勒，这就是为什么他们是老板了，我们却还在打工... 阅读全帖 |
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a***a
发帖数: 8941 | 10 As far as I know, 5.7x28 muzzle energy is less than 500fpe, a little more
than a 9mm pistol, however, that is from P90, not from Five-seveN.
I suppose the muzzle energy is about the same or smaller than a normal 9mm
pistol.
9mm |
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a***a
发帖数: 8941 | 11 For normal commercial ammo,
.308 muzzle energy is about 2700fpe
.30-06 muzzle energy is about 2900fpe
That means typical .30-06 has about 7% more energy than .308
So typically .30-06 is more powerful than .308, but just a little more, not
much more, hoho.............. |
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a***a
发帖数: 8941 | 12 And please keep in mind, what I was talking above is current "commericial
ammo"
If talking about military ammo, that is different story.
I remember military .30-06 has a muzzle energy of about 2400fpe, while .308
military ammo has a muzzle energy of about 2500fpe, so military .30-06 is
even less powerful than .308, probably due to the improved propellent of .
308 over .30-06
So, energy wise:
mil .30-06 < mil .308 < commercial 308 < commercial .30-06 |
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k*******n
发帖数: 5546 | 13 现在的产品flash hider和muzzle brake的分化比较模糊，5.56 AR如果不是打比赛专用
或者专打全自动，实在没必要用纯muzzle brake.
这一次BCM的Paul Buffoni又搞出了这么个新东东。
我自己的枪曾装过PWS FSC556，Rainier XTC，现在两把AR一把用的A2鸟笼，一把是
SureFire FA556-212A。
咱论坛里用YHM,Smith-Vortex, Battlecomp或者AAC的同学应该也不少吧。一直希望有
这么一个AR枪口装置，消焰效果一定要很好，能减少些枪口上跳，不那么响，不那么喷
，不那么长，不那么重，也不那么贵,但设计和材料也要好。
BCM能做到吗？ |
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k*******n
发帖数: 5546 | 14
for
先想好两点:
1）用途
2）想花多少钱（这个决定了材料和设计）
我那个FSC556作为muzzle brake以我买时的价钱和本身表现，unbeatable.
当然BC和SF的muzzle brake更好些。 |
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S**********s
发帖数: 4534 | 15 原来A2鸟笼才是性价比最高的神物。
我以后多半会搞个XTC或者FSC556。 这哥们说得很对， 本来就没有什么muzzle rise的
枪（如果有， 你姿势多半不对）再用muzzle brake往下压反而弄巧成拙。 |
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k*******n
发帖数: 5546 | 16 现在的产品flash hider和muzzle brake的分化比较模糊，5.56 AR如果不是打比赛专用
或者专打全自动，实在没必要用纯muzzle brake.
这一次BCM的Paul Buffoni又搞出了这么个新东东。
我自己的枪曾装过PWS FSC556，Rainier XTC，现在两把AR一把用的A2鸟笼，一把是
SureFire FA556-212A。
咱论坛里用YHM,Smith-Vortex, Battlecomp或者AAC的同学应该也不少吧。一直希望有
这么一个AR枪口装置，消焰效果一定要很好，能减少些枪口上跳，不那么响，不那么喷
，不那么长，不那么重，也不那么贵,但设计和材料也要好。
BCM能做到吗？ |
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k*******n
发帖数: 5546 | 17
for
先想好两点:
1）用途
2）想花多少钱（这个决定了材料和设计）
我那个FSC556作为muzzle brake以我买时的价钱和本身表现，unbeatable.
当然BC和SF的muzzle brake更好些。 |
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S**********s
发帖数: 4534 | 18 原来A2鸟笼才是性价比最高的神物。
我以后多半会搞个XTC或者FSC556。 这哥们说得很对， 本来就没有什么muzzle rise的
枪（如果有， 你姿势多半不对）再用muzzle brake往下压反而弄巧成拙。 |
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d****d
发帖数: 699 | 19 do dry fire and watch how the muzzle move towards left while you pull the
trigger. let the other hand support 75 percent and pulling the trigger
smoothly. Once you can pull trigger without affecting muzzle direction, you
will be a good shooter. |
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c****x
发帖数: 1270 | 20 Possibly the only topic to generate more arguments than politics is the
never-ending discussion of what qualifies as the “best” home-defense gun.
The truth of the matter is, no single shooting solution meets the needs of
every individual or household. Every firearm is an exercise in compromise.
Each platform has limitations to be considered carefully when making a
choice.
Many firearms can be useful for a variety of applications, such as target
shooting, hunting and concealed carry, as well as p... 阅读全帖 |
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S**********s
发帖数: 4534 | 21 anything that "muffle" your muzzle blast is considered a suppressor, which
is an NFA regulated item which requires rather simple/complicated paperwork
based on your state law.
You won't be deaf unless you put your ear next to the muzzle, then you maybe
deaf in one year. Some short term ringing maybe, mostly reversible, but
death is not reversible.
hearing conservation for military was practically non-existence until the
70s. Before you have to be an artillery man or something similar to wear one... 阅读全帖 |
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j****N
发帖数: 1289 | 22 目前俺的认识是这样的：
如果firearm是for sport purpose，那么就不subject to 992r。
一般来说，for sport purpose，几样东西不能有。
high capacity mag（10+ rifle，5+ 咸蛋）。
pistol grip
muzzle attachment
folding stock
bayonet
对比vepr 12，pistol grip和muzzle attachment（thread protector）都有了。不知
道为什么ATF让import了。
但是既然允许进口，vepr 12 default config（mag capacity是五发）就不subject to
922r了。
但是如果用超过5发的弹夹，会触发922r，所以要换掉几个parts。普遍建议是参照
saiga咸蛋做。 |
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h*******g
发帖数: 2201 | 23 Seems impressive. But I did not see they seal the muzzle when doing the sand
/mud test in Sig 716. Here they sealed the muzzle. |
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S**********s
发帖数: 4534 | 24 hmm, shouldn't you get your stamp first then install the stock?
otherwise you have a unauthorized SBR in your hand before you can get
approved.
as far as muzzle brake..i think either the original AK74SU type or nothing.
SBRs are already louder than my mexican neighbor, installing muzzle brake is
like giving them a loud speaker. not to mention the giant fireballs... |
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m********a
发帖数: 1312 | 25 斑竹刀下留人，我只是想问一下各位老枪，当年这个Ban都是啥内容。咱都讲究防患意
识，一旦真的再来一个assault weapon ban，都有哪些东西会禁售，在最后通过前是否
会彻底脱销。
wiki了一下 http://en.wikipedia.org/wiki/Assault_Weapons_Ban
发现上面许多条款跟我们NJ现在的说法也差不太多，除了可能ban更多牌子。
Criteria of an assault weapon
Assault weapon (semi-automatic) refers primarily (but not exclusively) to
firearms that possess the cosmetic features of an assault rifle (which are
fully-automatic). Actually possessing the operational features, such as '
full-auto', is not required for classification as an assau... 阅读全帖 |
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k*******n
发帖数: 5546 | 26 我维基了一下，MK12 SPR 18寸用的确实是douglas的blank.
Navy Seals Recon 的16寸不锈钢关用的是 Lilja blank, chambered by Compass
Lake. 喜欢看电影的弟兄们可以克隆一根。
According to Wes Grant of M.S.T.N. a premiere small arms builder, these
weapons were initially built in-house with the only specifications being the
ability to shoot any 5.56 x 45 mm cartridge in inventory (at the time this
included the first iterations of the 77-grain (5 g) Mk 262 Mod 0 cartridge),
and that the weapon have a barrel 16 inches (406 mm) in length.
The barre... 阅读全帖 |
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m********a
发帖数: 1312 | 27 借这个话题问一下，前些日子买的vepr 7.62x39 20inch integrated sight,类似这个
，枪口有现成thread，问题是如何知道这个外径跟muzzle break匹配？真要用游标卡尺
量一下？
还有就是NJ有规矩，不许加flash hide但是好像可以上muzzle brake，不知NJ的枪友谁
有经验。 |
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d*******r
发帖数: 590 | 28 NJ 不许用 Flash Hider，YHM Phantom 5M1 或 5M2 都是 Muzzle Brake，NJ 合法。
5M1 带尖刺，样子比较“邪恶”，5M2 是平头的，“清纯无辜”一点。两个都不错，网
上一般卖 $25 到 $30 之间。螺纹都是 1/2 x 28 标准的，但NJ 不许螺纹枪口，所以
Muzzle Brake 必须 pin & weld ，光拧上不行。
更正一下：在 NJ 如果没有手枪把，可以有一样其它的 “邪恶特征”。VEPR 上应该可
以有 Flash Hider。 |
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s*******n
发帖数: 12995 | 29 SGL21有
1. front sight block with bayonet lug
2. pistol grip
这个连1994AWB的标准都过不了吧。。。
Semi-automatic rifles able to accept detachable magazines and two or more of
the following:
Folding or telescoping stock
Pistol grip
Bayonet mount
Flash suppressor, or threaded barrel designed to accommodate one
Grenade launcher (more precisely, a muzzle device that enables launching or
firing rifle grenades, though this applies only to muzzle mounted grenade
launchers and not those mounted externally). |
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Z*********i
发帖数: 3422 | 30 有一点忘了提醒，你注意一下前瞄前面的MUZZLE BRAKE的卡笋，如果看不清楚可以去问
卖家。我的Legion USA新买来时，前面的卡笋没有，还得寄回去让他们加上，不然打起
来MUZZLE BRAKE会转动。除此之外，这枪不错，准头也很好，价格也凑合（我买的时候
，NIB总共$769） |
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k**0
发帖数: 19737 | 31 .40SW口径的炸膛事故很多，看到一篇相关好帖，转过来大家看看：
Why the 180gr Bullet is a Bad Choice for .40 S&W
The original design of the .40S&W cartridge called for a one hundred and
eighty grain (180gr) bullet pushed down a barrel with a 1-in-16 twist to a
muzzle velocity between 950 and 980 feet per second (fps). This matched the
"FBI Lite" or "medium velocity" 10mm loads that were becoming popular at
that time.
However, in the years that followed, experience and experiment have shown
that the standard 180gr bullet weigh... 阅读全帖 |
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I*3
发帖数: 7012 | 32 另，
in CA
Muzzle Brake = legal
Flash hider = illegal
厂家把这货称做Muzzle Brake，也算是用心良苦
因此，这枪目前是加州合法的，只要改成10发固定弹匣。。。
Silencer 另议。。。 嘿嘿
鉴定完毕。。。
12276 |
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h*********2
发帖数: 2508 | 33 赞模特
枪也很给力，前面的muzzle device能拧下来么？
这类手枪因为木有托，就靠换个muzzle brake制退了 |
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h*********2
发帖数: 2508 | 34 赞模特
枪也很给力，前面的muzzle device能拧下来么？
这类手枪因为木有托，就靠换个muzzle brake制退了 |
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S**********s
发帖数: 4534 | 37 Muzzle brakes don't make friends +1
You know that "oh fuck me" feeling when you see someone put his muzzle
braked .50 bmg on the bench next to yours. |
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S**********s
发帖数: 4534 | 38 Traditionally, a revolver barrel is lined up with the top cylinder (12 o'
clock position, and fires the chambered round from said position. Because
the bore line is above the shooter's hand, the gun will flip upwards during
recoil.
Chiappa Rhino and a few other revolvers utilize the bottom cylinder (6 o'
clock
position) as a chamber, lowering the bore axis to the palm of the shooter
and directing recoil straight back into the shooter's arm, thus eliminating
most of the muzzle flip.
https://www.y... 阅读全帖 |
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f********r
发帖数: 3155 | 39 这两个的action和管子缠距完全一样，CZ 550 Varmint的25.6"管，装个muzzle brake
装750说成26"，四舍五入，是在玩字游戏。同一个厂大批量生产的枪，共用
barreledaction很正常，26"管子的SPS varmint，截成20"就成了SPS tactical，而不
是把20"的管子弄成26".
两者共用一个barreled action的说法从来没见CZ出来否认过。CZ是从来不放弃宣传产
品的特色，看看75系列手枪几个竞赛型号，比常规75改进的地方列的清清楚楚。如果
750是花功夫accurize了，CZ不宣传才怪了呢，否则市场部门该换人了。我不认为750有
多贵，市价$1.7-$1.8K的样子，比A3G便宜多了。550 varmint换个完全可调的枪托，加
muzzle brake，花费很容易就$1K了
用Surgeon这样的顶级action，加上308竞赛管子，定制chamber，手装弹，可能经常打
出五发0.3。你这是用厂枪加厂弹，打出了0.3这个顶级定制的精度，这水平要是还烂，
这个版上大多数人还怎么过日子。隔一两分钟打一发，枪和射手的... 阅读全帖 |
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h**********n
发帖数: 394 | 41 背景：2012六月份时我侥幸以很低的价格从Buds Gunshop 拍到了一把当时新上市不久
的FNS-40。本来对这把枪的了解仅限于2012 SHOT Show, 只是当时价格实在太有诱惑力
，所以决定吃一次螃蟹。这篇review 的目的就是在这一年之际将我对FNS-40 的印象整
理出来，并且将FNS-40 与其它几种我使用过的Striker-fired 设计予以横向比较（
Walther PPQ 9mm & .40SW, Glock 19 Gen3 9mm, Caracal F&C 9mm).
I. 人机功效 Ergonomics 4.5/5 分
在我看来，不管一把手枪的性能怎样，一个优秀设计的重要原则之一是它是否舒适。如
果这把枪第一次上手，你就觉得这把枪握着别扭，那么又何必虐待自己去花时间和金钱
去适应一个不属于你的设计？从人机功效的角度来看，FNS-40 的设计是很成功的。FNH
把一个 compact size 的 slide 装到了一个 full size 的 frame 上，使得FNS-40
握在手里有很好的平衡和指向性。
1) 握把角度 & 轮廓： FNS40 采用... 阅读全帖 |
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d******h
发帖数: 503 | 42 学习了。
看来至少要28” 才能打猎打飞碟：
Shotgun Barrel Length
By Chuck Hawks
To get immediately to the heart of the matter, based on long personal
experience, I generally have little use for a shotgun with a barrel less
than 28 inches long for hunting flying game (upland or waterfowl), or for
shooting aerial targets ("clay pigeons"). You should also be aware, gentle
reader, that while I personally own all of the common types of shotguns (
side-by-side, over/under, autoloading and pump), I have a strong preferenc... 阅读全帖 |
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n******0
发帖数: 89 | 43 Shooter 的话，首先要看BORE了，现在SIMPSON卖的都给量MUZZLE的，K31新BORE SPECS
范围从7.50 -7.57mm，7.64mm的BORE就是枪管寿命结束了。原则上MUZZLE尺寸是越小越
好，但也不绝对，因为生产枪管时REAMER磨损越小，CUT出的BORE越大，我图中第二枝
和第一枝枪况都差不多，估计就是因为BORE是7.57的，比第一枝7.53大不少，就便宜
200块，但一看来复线，两枝都是RAZOR SHARP。 还可以结合弹匣来看，SIMPSON卖的枪
都有个俯视图，可以看到弹匣内部发蓝磨损情况，磨损少的按理就是打得少的。
然后就看托和发蓝啦。托有裂缝的最好尽量避免，WALNUT的托普遍比BEECH的WATER
DAMAGE小点，普遍状态好点，虽然BEECH的生产日期普遍更晚些。另外托右侧打的瑞士
小盾标记要有，且越清晰越好。TANG上打了字号的一般都是军械库重整过的，K31绝大
多数都是全对号的，包括托和护木，BOLT SLEEVE上电笔刻上系列号的枪比较常见，对
价值的影响不是太大。
以上只是点个人经验，指点谈不上，希望对你有点帮助。 |
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d*******s
发帖数: 15155 | 44 在东北和西边政客上蹿下跳的时候，大Georgia带来了好消息。
Georgia: Comprehensive Pro-Gun Legislation Passes in House Committee
Yesterday, Pro-Hunting Bill to be Considered by Senate Committee Next Week
Yesterday, House Bill 875 passed in the state House Public Safety and
Homeland Security Committee by a voice vote. It now goes to the House Rules
Committee where it will be assigned to the House floor.
HB 875, introduced by state Representative Rick Jasperse (R-11), is the most
comprehensive pro-gun reform legislation int... 阅读全帖 |
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S**********s
发帖数: 4534 | 45 咱不追求competition那样的race gun, 火球和震耳欲聋的muzzle brake咱就不搞了。
在室内打muzzle brake的枪真是很让人受不了。 |
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e*f
发帖数: 1709 | 46 Large calibre pistols better have long and muzzle heavy barrels to provide
large moment of inertia, which helps reduce the upward movement of the
muzzle. |
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t****a
发帖数: 16 | 47 Description: BSH XM15 M4A3 CRB 223 5RD
Manufacturer: Bushmaster
Model #: XM15 A3 M4 Type Carbine
Type: Rifle: Semi-Auto
Finish: Black matte
Stock: Telestock Style Butt Stock Fixed In Position
Sights: FT: Adjustable Post RR: Adjustable
Barrel Length: 14.5" Chrome-Lined M4 Type BBL
Overall Length: 30.875"
Weight: 6.57 lbs
Caliber: 223
Capacity: 5+1
Action: Semi-Automatic
# of Mags: 1
Chokes:
Packaging:
Receiver: Forward Assist Brass Deflector
Cham... 阅读全帖 |
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e*f
发帖数: 1709 | 48
It is brutal only if you shoot .357mag out of it. But the Rhino 2" should
handle the .357mag (or .40sw) much better without the wrist breaking torque
due to its low barrel axis.
It's been pointed out above that the muzzle energy is about the same out of
the 2" snub for .357mag or 9mm, because the peak chamber pressure (35000psi)
is the same for them. However, shooting .40sw out of 2" Rhino will achieve
20% higher muzzle energy compared to .357mag or 9mm, because it has the same
chamber pressure... 阅读全帖 |
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t******l
发帖数: 10908 | 49 当然我觉得那张图片的 muzzle 的轴线也比较平，往前下方 45 度似乎更加 muzzle
polite 一些。。。当然如果前方已经是面对歹徒了，另说。
：俺纸上谈枪的，给楼主找了两个 link |
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H********g
发帖数: 43926 | 50 AK47普通钢芯弹头重7.9克，初速718 m/s。mv=5.6722 kgm/s=5.6722Ns.
假如这个冲量被一个80kg的人+枪均匀吸收，用来抵消重力，那么消耗的时间是5.6722/
80/9.8=7.235毫秒，也就是说每秒需要射出138发子弹。
实际上因为前喷的火药气体还有很可观的冲量，所以不需要发射这么多子弹就可以保持
悬浮了。
另外，ak47全自动射速是10发每秒，每只枪加一匣子弹（30发）自重是4.5kg。所以假
如人体重是A，需要的枪数量是Q：
(A+4.5Q)x9.8x0.1=5.6722Q,
因此对体重A的人来说需要的枪数是Q=A/1.29,对于一个80kg重的人需要62支枪。
The 57-N-231 conventional steel-core bullet is designed to engage personnel
and weapon systems.
Cartridge designation[13][14]
57-N-231 57-N-231P (tracer) 57-T-231PM1 (tracer)
Cartridge wei... 阅读全帖 |
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