
	Where results make sense

Topic: Closed bolt

Related Topics

Open bolt

M249 SAW

Machine gun

FG42

Bow (weapon)

Longbow

STANAG

Crossbow

In the News (Fri 27 Nov 09)

Northern Trust

Marvin Harrison

Peter Chernin

Gary Locke

Match Play

Penelope Cruz

Mickey Rourke

AR Rahman

Danny Boyle

Hugh Jackman

	Full Auto Closed Bolt UZI Operation (Site not responding. Last check: 2007-10-13)
		Using the recoil spring from the closed bolt configuration then installing in the open bolt, you can see that the guide rod can be shoved all the way in the bolt without the springs becoming fully compressed.
		The closed bolt with the striker assembly is 1 lb 11 oz.....3oz heavier.
		The 5 lb discrepancy is due to the closed bolt not being counterbored as deep as the open bolt.
	www.c3junkie.com /uzi/info/closedbolt (1324 words)

	Adjustable door latch striker - Patent 4113293
		It is preferred that the bolt threadably engages the flange bolt and that means to rotate the bolt are associated with the end of the bolt towards the lip.
		The bolt may be rotatably fastened to the movable wall by securing means so that rotation of the bolt in the flange causes longitudinal movement of the bolt and movement of that wall.
		As the keeper surface of the latch bolt, when the door is closed, bears against the movable wall, greater durability of the adjustable strike and resistance to the rebound forces exerted by the latch bolt on the strike when a door is closed are achieved.
	www.freepatentsonline.com /4113293.html (2895 words)

	Research Project: Open Bolt vs Closed Bolt - PbNation
		Closed bolt offers the advantage that when you fire there isnt a bolt slamming into a the ball which in theory causes less deformation of the ball when fireing leading to the better accuracy etc claims.
		Closed bolt markers require that you probably size the bore of your barrel to prevent rollouts thus properly set up closed bolt markers are generally very accurate but not really because they are closed bolt but because the design demands close attention be paid to the barrel.
		The the new tech-t l7 bolt for the ion weighs in at 8.6 grams.
	www.pbnation.com /showthread.php?t=1833395 (1603 words)

	Where's the Bolt?
		In a closed bolt system, the bolt remains forward, sealing the breech (back of the barrel) until the paintgun is fired.
		In an open bolt system, the bolt remains open until the time of firing, when it closes, chambering the paintball, then it opens again, for a new ball to fall into place.
		Many people argue that since the ball is jostled in the fraction of a second before firing, and since the bolt may open again before the ball actually exits the barrel, an open bolt paintgun will not be capable of the same accuracy as a closed bolt paintgun.
	www.warpig.com /paintball/technical/paintguns/balistic/closedopen.shtml (1286 words)

	Full Size Uzi: Closed Bolt Info and Pics - UZI Talk Forums
		This is why it is called a “closed bolt.” When the trigger is pulled, the sear is retracted allowing the striker assembly to move forward and the primer is ignited by the firing pin.
		Two reasons for this higher cyclic rate: (1) the additional length of the closed bolt buffer (buffer is 1 and 3/4 inches long), and (2) the rear portion of the striker assembly, that protrudes from the back of the closed bolt, adds at least another 1/2 inch.
		Two reasons for this: (1) the additional length of the closed bolt buffer (buffer is 1 and 3/4 inches long), and (2) the rear portion of the striker assembly, that protrudes from the back of the closed bolt, adds at least another 1/2 inch.
	www.uzitalk.com /forums/showthread.php?t=2909 (2929 words)

	UZI Talk - Bolts
		The original UZI was an open bolt design, although closed bolt designs followed in the Mini and Micro as well as semi automatic versions of the UZI.
		The closed bolt design is also considered to be more accurate, particularly in semi automatic fire, because the bolt does not move between the time the trigger is pulled and the round is fired.
		Additionally, the bolt for the semi automatic version of the Carbine has a slot cut into the right side, allowing the bolt to pass over the blocking rail that is welded on the inside of the Model A and Model B receiver.
	files.uzitalk.com /reference/pages/bolts.htm (1114 words)

	Types of Operation (Site not responding. Last check: 2007-10-13)
		May be 'turnbolt' in which the bolt is pushed forward and then turned down to lock by means of a handle; or a 'straight pull bolt' in which the manual action is a simple and reciprocating movement and the bolt is turned and locked by cam or wedge action.
		The bolt is opened as the lever is pushed in a sweeping arc, forward and away from the rifle.
		As the shooter pulls the slide to the rear, an arm (or arms) attached to the bolt pushes the bolt to the rear.
	matrix.dumpshock.com /raygun/basics/operation2.html (1409 words)

	Mauser
		The right lug, (bottom one when bolt is closed) is solid, and the left (or upper) lug is slotted for the ejector to slide through to make contact with the cartridge rim when the bolt is drawn to the rear.
		The bolt face of the Boer Mauser is thus unusual and characteristic in that its bottom is square.
		The bolt handle, at the rear of the bolt, is forged as part of the bolt.
	library.thinkquest.org /26852/logistics/mauser.htm (2304 words)

	Paintball Technical Pages
		Later aftermarketeers, and eventually Sheridan, produced center-fire bolts with the belief that releasing the jet of gas on the center of the rear of the paintball led to greater accuracy.
		The Sheridan valve closed bolt pump concept was used in a number of paintguns that Sheridan manufactured for PMI, the KP, KP2, KP3, PMI-1, PMI-2, and PMI Pirahna notably.
		When the sear releases the bolt, a valve is operated (by the sear in some designs, and by the bolt in others) which cuts off the flow of gas into the chamber (this is known as the On/Off valve in the Automag terminology).
	www.warpig.com /paintball/technical/valvehist.shtml (2973 words)

	Gunboards - Bolthead Question (Site not responding. Last check: 2007-10-13)
		Since the bolthead is screwed onto the bolt not exactly in this way, that the bolthead sits flush on the face of the bolt, the thrust after firing a round is transfered to the threads.
		The maximum rotation of the bolt head past the bolt locking lug is 20 degrees, the bolt or bolt head would have to be replaced if travel is more than 20 degrees.
		When the bolt head overturns the right bolt lug column by more than 20 degrees the threads start to absorb the recoil and not the two mating surfaces of the bolt head and bolt face, it also accelerates bolt head wear because of peening.
	www.gunboards.com /forums/topic.asp?TOPIC_ID=196485 (1687 words)

	Closed bolt v. Open bolt - PbNation
		A closed bolt fires with the bolt forward and up agianst the ball, while an open bolt fires from the rear position and shoots forward into the ball then blasts the air.
		The closed bolt design is inherently more accurate as the breech is fully sealed by the bolt and the bolt is not travelling at the moment of firing.
		closed bolt- the actual shooting of the ball is a seperate function of re-chambering a ball (im talkin cockers here...i know nothing of how a trix works).
	www.pbnation.com /showthread.php?t=268749 (1960 words)

	[No title] (Site not responding. Last check: 2007-10-13)
		Theoretically a closed bolt design should be easier to fire accuratly as the gun is stable until fired.
		The open bolt action and movement of the bolt is actually quite light, and it is of a rotating bolt design, also like the M-16.
		The main concern I would have though in using an open bolt is fear of case head seperations resulting from the case being extracted from the chamber while pressures were excessive.
	www.strategypage.com /militaryforums/1-1980.aspx (1308 words)

	SoldierTech: The Gun That Never Was
		The M-16 is a closed bolt weapon, while the M240 machine gun is an open bolt weapon.
		Weapons that fire from the open bolt start on sequence number 5 and work their way down through 7 back to 1, and finally stop on 4 (with the bolt locked open).
		The rifle itself is relatively straightforward (the G11 fires from the "closed bolt" position, and the breech is gas piston operated), with the exception of the rotating breech/chamber cylinder.
	www.military.com /soldiertech/0,14632,Soldiertech_G11,,00.html (1716 words)

	Finest Bolt Action Rifles Ever Produced
		The split rear receiver helps to prevent bolt wobble when the action is opened, but was to cause trouble later, when the use of telescopic sights became widespread, as it prevents the use of conventional scope mounts on top of the receiver.
		He decided to address the issue of bolt wobble, and largely eliminated the problem by making his one piece bolt as fat as the locking lugs, which are machined into a reduced diameter bolt head.
		Because the fat Weatherby Mark V bolt is so smooth in operation and has a short rotation to unlock and lock, it is one of the fastest of all bolt actions for follow-up shots.
	www.chuckhawks.com /finest_bolt_actions.htm (2861 words)

	GEW 88 Features
		Unfortunately, there was a problem with this design: when this type of bolthead is closed over the magazine, it strips the top cartridge out of the clip, but does not allow the extractor to slip into the cartridge's extractor groove until the bolt is closed.
		If the bolt were then again pushed forward again over a loaded magazine, a second loaded cartidge would be stripped out of the clip and pushed forward into the first loaded cartridge in the magazine.
		This way, if the bolt is withdrawn without having first been closed, the loaded cartridge will be withdrawn along with the bolt -- obviously a much safer arrangement than the first.
	home.att.net /~vintage-gunlore/GEW88-Boltheads.htm (419 words)

	pbreview.com - Paintball Reviews and Paintball Fields (Site not responding. Last check: 2007-10-13)
		As u know closed and open bolt as the same accuracy...so if they put an open bolt on it it should be near really near a spyder clone...
		Lets see a non vision stock impulse is capped at 13.something so there is another plus and it will chop less oh and another plus is that it is closed bolt.
		Closed bolt means that the bolt is in the closed position when the marker isn't being shot.
	www.pbreview.com /comments/?rev=83683 (441 words)

	awbansunset.com forums - Powered by XMB 1.9.1 Nexus
		The bolt may be kept closed during the firing sequence only by the inertia of the bolt.
		Because the inertia of the bolt is what keeps the bolt closed, the bolt of an open bolt weapon is of necessity much heavier than a closed bolt gun.
		The way it works on a closed bolt version is that when you load the mag, insert it into the gun, and cock it, the bolt pushes forward, strips the round from the magazine, and puts it into the chamber.
	www.awbansunset.com /forumsOLD/viewthread.php?tid=2258 (902 words)

	Precision resizing (Bart Bobbitt)
		If the chamber is too short and a minimum gage is used, the bolt won't fully close; the chamber must be lengthened with a reamer to fix the problem as new cases may not allow the bolt to be closed.
		If a maximum gage is put in the chamber, the bolt should not be able to close which verifies the chamber headspace is within manufacturing limits for safe use with new cases.
		But if the bolt closes on a maximum gage, chamber headspace is too long and new cases may rupture if fired in such a chamber.
	yarchive.net /gun/ammo/precision_resizing.html (1317 words)

	Angel open or closed bolt system? - Paintball-Guns.com Forums
		Open or closed bolt describes the action of the bolt when the gun is fired.
		On a closed bolt system the bolt is opened after the paintball has been fired.
		Open bolt systems are more simple, and allow for a higher rate of fire, closed bolts systems are more accurate because the motion generated by the cycling of the bolt occurs after the gun has been fired.
	www.paintball-guns.com /forums/showthread.php?t=1592 (258 words)

	Open bolt - Wikipedia, the free encyclopedia
		When the trigger is pulled the bolt goes forward, feeding a round from the magazine into the chamber and firing it.
		This is not generally true, however, as the operation of basic open bolt weapons sends the bolt carrier back into a cocked position via the excess gas from the spent round.
		In the U.S., the ATF made a ruling in 1982 that semi-automatic open bolt weapons are readily convertible to fully automatic fire, therefore such weapons manufactured after the date of this ruling are classed and controlled as fully automatic weapons (weapons manufactured prior to the ruling are grandfathered and are still considered semi-automatic).
	en.wikipedia.org /wiki/Open_bolt (287 words)

	Ashland Lake Gub Club - Subgun Clinic (Site not responding. Last check: 2007-10-13)
		Bolt is fully locked prior to firing pin activation.
		Bolt is closed (locked in breech) after each shot.
		Bolt is nearly closed, but is not locked in place.
	www.ashlandlakegunclub.org /subgun_clinic.html (1050 words)

	Automags.Org Online Forums - Ideal Bolt Travel Times/Accelerations
		In a closed bolt system, the bolt opening has to be timed which means either sacrificing maximum ROF for reliable ball feed or sacrificing ball feed reliability at high AND low ROF by timing bolt opening for high ROF performance (AND your performance is still affected by feed system performance).
		The maximum acceleration a bolt could reasonably put on a paintball is at least as great as the acceleration a paintball experiences due to the air pressure from firing.
		LVL 10 is obviously an attempt to reach the ideal bolt acceleration curve.
	www.automags.org /forums/showthread.php?t=39156 (905 words)

	Chuck Taylor's ASAA THE HECKLER & KOCH MP-5 SUBMACHINE GUN
		In fact, that it fires from a closed bolt was intentional, a design feature that eliminates the "lurch" felt with a conventional fires-from-an-open-bolt SMG when the trigger is pressed.
		A finer degree of accuracy can be obtained with a gun that fires from a closed bolt, since the only disturbing influence on 'hold' is the forward movement of a light hammer and/or firing pin as opposed to the forward movement of a heavy bolt.
		The 'lock time' (the period from trigger/sear release to ignition of primer) is also less on a weapon that fires from a closed bolt than on a weapon that fires from an open bolt; the other side of the coin in this case, however, is the cookoff' problem.
	www.chucktaylorasaa.com /mp5.html (1255 words)

	M96 History (Site not responding. Last check: 2007-10-13)
		Unlike that of the M16, the Stoner's bolt carrier is cycled by the gases impinging upon a piston which is directly connected to the bolt carrier.
		In rifle configuration, the Stoner 63 fired from a closed bolt, feeding from the bottom of the rifle, and could fire in either the semi-automatic or fully-automatic mode.
		The M96 had to be designed to fire from a closed bolt in all configurations to meet legal requirements for ownership by civilians.
	www.robarm.com /RA_m96_history.html (442 words)

	P8Glossary C to D - P8ntballer.com
		A chronograph measures the velocity of the paintball as it is shot from the marker.
		All pumps are closed bolt, semis that are closed bolt include the Autococker and the Sovereign.
		The process goes something like this: breech is opened (normally by the bolt retracting) allowing paintball to drop in, bolt goes forward taking paintball with it, hammer strikes exhaust valve, gas released from exhaust valve via bolt propelling paintball, marker recocks.
	www.p8ntballer.com /Glossarypages/CtoDpage.shtml (515 words)

	Automags.Org Online Forums - open/closed bolt
		closed vs open is a big difference, but people who have open wont say anything that thier guns are worse (again were talking about accuracy)
		In fact, 2k3 SP shocker may be an open bolt design because they are having such a problem making it work.
		Well,first off,SP states "closed bolt accuracy" they make no direct comparison to open bolts.So yes,closed bolts are accurate.
	www.automags.org /forums/showthread.php?t=84753 (675 words)

	Support fire version of the M16
		Chrome or nickel plating of the bolt and bolt carrier.
		Most rifles fire from a closed bolt for increased accuracy, while weapons such as machine guns and SMGs usually fire from an open bolt to aid cooling.
		There is sufficient internal room for the recoiling bolt to not impact the back of the receiver, which it is claimed increases control and decreases felt recoil.
	www.angelfire.com /art/enchanter/m16mg.html (1366 words)

	Army Times - The lore of the Corps: Reisings found to be unreliable in combat
		Most submachine guns fire from an open bolt, meaning the bolt stays to the rear when the trigger is released to stop firing.
		The chamber remains clear of a cartridge until the trigger is pulled again, releasing the bolt, which retrieves a cartridge from the magazine, inserts it in the chamber and fires it.
		The disadvantage of open-bolt firing is that the travel of the bolt forward disturbs aim.
	www.armytimes.com /story.php?f=1-292308-1762643.php (486 words)

Try your search on: Qwika (all wikis)