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英國陸軍採購新槍 - L129A1

(QCB) Quick Change Barrel = 快坼式槍管.
因為連發時間太長槍管過熱會張子彈COOK-OFF! (Jam 槍); 為一方法就係換管, 但係–般机槍換(free float)管係好煩! 有必要挍管! 而新一代QCB管就只要30秒完成裝坼, 回想當年射M2 50 CAL.舊式机槍換管係好煩! 新一代50 CAL.換管易好多! 連發時條管真係見紅, 唔換一定Jam! QCB對50 CAL.机槍係偉大發明! 當你打扙就會明換管快係有幾好!

[ 本帖最後由 rho837 於 19-1-2010 12:44 編輯 ]

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近期袋鼠島兵都買左批SR-25! 每對兵就有1支! 用來對抗啲M700; AK.....等等交長程射擊用! 等班AK友唔好以為300m遠就今吋.

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Refer #38 comment

http://www.inetres.com/gp/military/infantry/mg/M2.html
http://en.wikipedia.org/wiki/Free-floating_barrel

I was told the Browning M2HB 50 cal. heavy machine gun is free float barrel design (which make sense with the captioned links)....... so what is your definition for fixed type barrel machine gun? Reference please? Army didn't have much choices in the old days!

Is Brittish force used GPMG fixed or float barrel by definition?

[ 本帖最後由 rho837 於 20-1-2010 18:54 編輯 ]

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You didn't read my post clearly! I only catch the word (QCB - post#16) only and not sniper rifles! (Read it again, and don't mislead others as I didn't talk sinper guns!) But I suppose when mentioned 50 cal. machine guns most of you (some soilders here) do understand we are talking about those M2HB machine gun! Because, the term (QCB) apply clearly described on these MACHINE guns! Of course, the F88, M249 I used or even some of you guys also shoot before are also defined (QCB) rifle as well, but the definition mainly concern modularity in military application aspects, the reason is I never be stupid to bring two either long or cabine rifle barrels into the field at the same time unlike aboved-mentioned 50 cal. (specific purpose ie. burst; heat up and replace ), small bore rifles require barrel changing only account on pre-assume tecitical condition; whereas Masada rifle based on modular co-ordination concept for time and cost concern. Which this concept will be in US mil-spec. tender condition in future weapons. However, CHing you mentioned....."不過師兄你唔講都唔覺有機槍係用free floating....少之又少..........fixed barrel machine gun????......" Infact, I don't catch your meaning! If not floating design! It should be fix barrel type then? And you ask me back what is fix barrel   Well, I truely don't know and I need your advice Ching. Thx.

Note: some M249 do need extra barrel for (squarding) burst purpose. BTW: M2 machine gun are famous for long time and a lot of people knew her existance, most of western world use M2 type! M2 and M249 are very common weapon! And they both are free float as well. The term free float I associated actually within definition of floating barrel design because torque transfer are minimial into the barrel via handguard and gas regulator system, QCB are floating design and process free floating charactistic, don't just listen to people said this is right and that is wrong! Understand the overall structure of the weapon in determine the barrel system. ie. floating post little stress along the barrel. So what do you mean 少之又少??? Do you understand what floating in engineering sense? Did you read any previous posted link reference! It clearly said there.

[ 本帖最後由 rho837 於 23-1-2010 19:22 編輯 ]

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我冇興趣再講! 因為你只識"咬"而唔識回答問題! 你勁專門! 你話唔係咪唔係law. 你咪教我地過啲係乜float!

請你再睇吓支M249QCB連regulator係咪裝死起個身到! Requlator是否主要成托支管結構? 叫得QCB.....我唔再講啦!

Biport design for effective prupose and it has movement joints to account upward force in one direction. If SR25 shoot against portective barricade with barrel touching any barricade edges! Is not a free float barrel? Any 8 inch Revolver has nothing touch against the barrel and its a fixed barrel type! Why?

[ 本帖最後由 rho837 於 23-1-2010 19:40 編輯 ]

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This topic is enough for me! If you understand the engineering aspects of free float and floating means and you will not said its a "real gun world term"! You would shut up la! Anyway you egar to win the post! U win la.

[ 本帖最後由 rho837 於 23-1-2010 19:44 編輯 ]

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