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gas tube
A gas-filled tube, also known as a discharge tube, is an arrangement of electrodes in a gas within an insulating, temperature-resistant envelope. Gas-filled tubes exploit phenomena related to electric discharge in gases, and operate by ionizing the gas with an applied voltage sufficient to cause electrical conduction by the underlying phenomena of the Townsend discharge. A gas-discharge lamp is an electric light using a gas-filled tube; these include fluorescent lamps, metal-halide lamps, sodium-vapor lamps, and neon lights. Specialized gas-filled tubes such as krytrons, thyratrons, and ignitrons are used as switching devices in electric devices.
The voltage required to initiate and sustain discharge is dependent on the pressure and composition of the fill gas and geometry of the tube. Although the envelope is typically glass, power tubes often use ceramics, and military tubes often use glass-lined metal. Both hot cathode and cold cathode type devices are encountered.
For sale is a new Ballistic Advantage 18" barrel chambered in 6mm ARC, 416 Stainless Steel with a QPQ finish, 1/7 twist, rifle gas length. It comes with low profile pinned gas block and melonite gas tube. Came as a replacement from BA for a defective one. No shipping, F2F in Portland metro area.
I have a lightly used Ultimak M2-B railed gas tube for standard AK rifles. This is the vented version. $75 shipped
This is also listed elsewhere, hence why the written name is slightly different in the pictures.
I have a 99% complete AR build, but can’t seem to move past a single item roadblock… installing the gas tube into the gas block. The issue is getting a roll pin to drive through the small hole at the top of the block. I’ve tried crimping or sanding the end of the roll pin to help get it started...
Son is doing a new build and here's the extra parts.
LMT / MAKO aluminum vertical forward grip, with sealed storage, like new was installed and removed before ever being used. $20
A*B Arms carbine length fde railed handguard set new take off. $10
Delta ring/barrel nut assembly with...
Sorry, this item has sold
New BCM BFH (CHF) 11.5" Govt profile 1/7 twist barrel (never fired)
Has dimple and is ready for a low pro gas block
This is not a pull-off, it is brand new.
There is oil on it.... :p
Please pm me for questions
I take PayPal friends and family and Venmo...
FS: BCA 20" HBAR profile 5.56 NATO 1:7 twist barrel w/gas block & pinned gas tube ~300 rds.
$80 FTF preferred: cash or Venmo, PPFF, Cashapp, Zelle, etc. in the greater Vancouver area. Shipping is a possible if buyer covers cost. If you see this post, it is still available.
This is a take-off from a Brownells MK18 upper. Never fired, new condition. It should have the .070” gas port since it was purchased in 2019, post the gas port size change that DD did in mid-2017.
Comes with MK12 gas block and carbine gas tube installed.
Asking $300, willing to ship and...
SLR rifle works Sentry 9 adjustable gas block for ar15 style rifle. 0.936” barrel diameter (varmint/bull barrel contour). Black melonite finish. Nexturn brand Swiss precision metering screw adjusts gas flow to bolt carrier group. Comes with black cerakote, rifle length gas tube. Unused...
Used ULTIMAK M1-B AK railed gas tube up for grabs. Taken off a used rifle I recently acquired. Will take place for standard length gas tube for the AKM platform.
$60 Local Pick up in Hillsboro.
Serious buyers PM with you phone number for fastest comms/text.
No trades please
Hi, I'm looking to sell my brand new SLR 13.5 Yugo handguard and railed gas tube set. They're brand new, only been mounted on the gun once and never shot with. I just don't have a use for them, and I'm returning my AK to stock. Please note that these only fit Yugo rifles like a ZPAP, and not...
Cleaning out parts for other projects. Would like to sell these parts together for $90.
All parts are brand new, but have some slight handling/storage marks.
Steel Low Profile Gas Block - .750
Expo Arms Carbine Length Gas Tube - Stainless Steel
Combat Armory 7" Carbine Length Super Slim...
Parting out BCM upper [ receiver, barrel with low pro gas block, mid-length gas tube, handguard, BCG, and charging handle. ]
Parts will be marked as new or used
1. Complete upper BCM receiver (with Strike industries enhanced dust cover and standard forward assist) $100 (NEW)
SOLD...
I recently bought a very nice Colt 14.5 barrel with attached FSB, the downside is that the gas tube is broken off inside of the FSB. Not sure how someone could manage that but here we are.
Any ideas to remove it? I've tried screw extractors and the like but couldn't get it. If anyone around...
Spikes Tactical NIB Bolt Carrier groups lightly used if even used at all $190 Each. only the top one is left.
National Match Free Float tube floats your barrel while maintaining the original Ar15 appearance. Delta ring is colt and grey has a lot of finish ware but I can swop it out for a new...
Looking to sell these together - $25 shipped. Bought a PSA AK-V and took them off and replaced with something else. Located in Castle Rock, WA
Grip looks brand new. lower hand guard has a few (very minor) surface scratches from being in the safe.
MOE® AKM Hand Guard – AK47/AK74
The...
I have a no name 10.5in barrel .223 wylde 1:7, gas block, tube and quad rail. Came on a preassembled upper, I have swapped out those parts with different parts looking to recoup some funds to put back in to this journey
Sold thank you Sins818
Got the start of a 300blk upper I’m looking to pass on. 10.5” heavy profile barrel, 1:8 twist, unknown manufacturer, i put 1k through it at least. Slight surface rust, nothing a wire brush won’t fix. Splintered A semi stripped upper. No port door but does have FA. Will include pistol gas tube...
BCA 7.5" barrel in 7.62x39. Comes with the gas block and tube ready. Switched to a 16" barrel. Less then a mag through it.
Perfect caliber to shoot right now since 7.62x39 is cheaper than 5.56 or 9mm and more commonly available