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pinned and welded
Pin brazing is an easy, metallurgically safe method of making electrical connections to steel and ductile iron pipelines as well as other metallic structures, which are to be cathodically protected or electrically earthed.
The pin brazing technique is based primarily upon Electric-arc silver soldering using a specially designed portable pin brazing unit, a hollow brazing pin containing silver solder and flux.
The brazing process is initiated by depressing a trigger on the brazing gun. This, as with most forms of electrical welding, simply completes a circuit through which a DC current is passed. The pin tip is the point of highest resistance at which point an arc is drawn, melting the solder flux whilst simultaneously heating the lug material and the surface of the structure or pipeline to the required soldering temperature.
After approximately 1.5 seconds the circuit is mechanically or electronically broken, the solenoid is de-energised and the brazing pin is pushed forward into the molten pool of brazing alloy. The pin tip, brazing alloy, flux and lug cool into a homogenous unit.
The pin brazing process is well suited for joints between insulated pipe sections, connection to measuring cables, installation of sacrificial anodes and bonding zinc bracelets to offshore pipelines, due to the ease and speed of installation, high mechanical strength and extremely low resistance.
Within a cathodic protection system there are a multitude of connection requirements for anode cables, measuring posts etc., being extremely versatile, the pin brazing system is ideally suited to this. Attachments can be made vertically, horizontally or even overhead. If preferred, threaded pins with nuts can be attached or cable bonded directly onto the pipe by means of a special cable lug which can be crimped on site or supplied complete as a unique integrally crimped attachment. The pin brazing unit contains all the equipment and tools required to make safe cable connections. A welding generator may also be utilized as a power source wherever a battery unit may be impractical or a great many connections need to be made in such places as pipe-coating yards or lay-barges etc.
Upper with 14.5" pinned and welded Colt C marked chrome lined barrel. Markings are C, MP, 5.56 NATO 1/7 twist. Also marked 01/06 closer to the receiver.
I purchased the barrel new and had it installed and pin weld done by Eric's Armory in Sandy several years ago. Barrel was in sealed packaging...
As the title states, I have a 14.5 inch ar15 upper chambered in 5.56.
Parts list:
-aero precision m4e1 enhanced upper, FDE cerakote.
-faxon socom profile 14.5 5.56 1/8 twist. Mid length gas.
-triarc pin-able gas block
-aero melanite mid length gas tube
-pinned and welded forward controls...
See photos for parts list. I also included what I spent on this amazing rifle
Looking for 1280 cash. Red dot and light setup are not included
This would save you 800 retail as well and the time and effort
If you have your Oregon concealed carry permit. You should have an instant approval on...
14.5 aero upper with pinned and welded deadair keymo on mk14 geisselle handguard to make it passed 16inch
no bcg, no charging handle and all accessories not included (magpul pro, red dot, light ) only selling the upper receiver
NIB never fired: sights not included
- Sharps Bros “ The Jack “ AR15 chambered in .223/556
Complete rifle is Sharps Bros, LPK / UPK / Grip and handguards.
- 14.5” 5.56 BA Hanson Midlength performance series
- Noveske flaming pig is pinned and welded for a 16” OAL.
- BCM Stock
- Fail Zero BCG...
For sale is a complete BCM 14.5 upper pinned and welded to right at 16 inches. It has the enhanced lightweight fluted profile barrel, chrome lined, and a 1/7 twist rate. Muzzle device is a Vg6 Delta enhanced flash hider. Comes with Aero Precision Nitrided Bolt Carrier and a barrel matched BCM...
Aero M4E1 upper
Geissele MK14 13.5” handguard
Geissele barrel nut wrench
14.5 Aero precision barrel ( roughly 300rds through it)
Deadair 3 prong flash hider QD
No BCG or charging handle
Bought about 2-3 months ago. Decided to go a different route. Can ship on buyers dime or meet locally $480obo...
Colt LE6921 non pinned and welded only shot 40 rounds through it LNIB no BCG and CH bought it that way since I have my own, red dot and back up sight does not come with it might be for the right trade. $500
UTG Pro drop in quad rail 12” in length. Mounted but wasn’t used really in great...
In my many years of experience I'm of the opinion that this Geissele Super Duty AR-15 is "as good as it gets" ~ PERIOD.
This is due to advances in metallurgy, coatings, forging parts instead of milling from bar stock and even looking to the past like the use of the Super 42 buffer spring...
Hi guys this item is for trade only for now looking for a 9mm pistol compact in size would be preferable and Optic ready is a plus or a decent LPVO set up with mount if you’re looking for a 14.5 upper and you have what I’m looking for let’s make a deal 😉 about the upper I’ve only shot 40 rounds...
Up for sale I have a PTR K3P (G3K) clone with p/w flash hider (16.2'' barrel). It comes with a genuine HK collapsible stock and Bipod. I am the second owner and only added the HK parts. I also have 12 magazines. I am asking $2000obo for the whole lot via Zelle, PayPal, cash or check. Let me...
Selling this barely used Colt 14.5 upper was planning to build a MK18 clone but that’s not happening anymore waited a long time to get this and only fire 2 boxes 40 rounds total for functionality test if it works with my lower and it shot awesome too bad I can’t keep goin on with my build this...
I have for sale my 14.5 upper thats pinned and welded to meet the required 16+ inches. Asking price is 500 obo and comes with the following:
Aero M4E1 upper (Black)
Geissele MK14 13.5” handguard (DDC)
Geissele barrel nut wrench
14.5 Aero precision barrel ( roughly 2-300 rounds through)
Deadair...
Have a rifle I put together that I’m looking to part with. Has zero rounds through the build.
It started as a factory assembled BCM BFH ELW 14.5” upper that the handguard was taken off of and replaced with the FDE version. Warcomp pinned and welded bringing the gun to a legal 16”. Aero lower...
For sale is a complete 14.5" Rifle chambered in 5.56 NATO. The fitment is perfect, no wiggle. Barrel is a Ballistic Advantage 14.5 Nitrided Barrel. Has a Nitrided BCG, Ambidextrous 45 degree safety. polished lightweight trigger, enhanced bolt and magazine release, B5 Sopmod storage Stock, and...
- 14.5” pinned/welded Geissele barrel
- OD MK16 13.5” handguard
- OD airborne charging handle
scratch on barrel nut but doesn’t affect installation.
Will ship on buyers dime.
open to trades:
- Trijicon SRO
- Sig P320 full size
- Bulk 300Blk ammo @ no more than $1 a round
- Aero STS15 lower
For sale is a 14.5 pinned and welded to 16" overall complete rifle. Upper comes with a ballistic advantage CMV barrel with a 5.56 chambering, mid length gas system, and 1:7 twist. A2 pinned front sight with a blitzkrieg components chevron post and a fixed rear adjustable sight. Nitrided bolt...
For sale is a 14.5 pinned and welded to 16" overall complete upper ready to drop onto any lower receiver. Comes with a ballistic advantage CMV barrel with a 5.56 chambering, mid length gas system, and 1:7 twist. A2 pinned front sight with a blitzkrieg components chevron post and a fixed rear...
AR15 New 5.56 Complete Uppers-Aero Precision 18"; Palmetto State Armory 16" & 14.7” Pinned
New old stock; safe queens. Functionally perfect. Accessories may have been added and removed, and uppers moved around safe, so not cosmetically perfect. None have been live fired, but all the...
I have too many AR15s and not enough handguns so I'm hoping to do a swap for something different.
Trade possibilities:
Arsenal AK
FN 509 tactical FDE
Sig P226 Tacops 9mm threaded barrel
Walther PPQ Q5 match
Archon Type B
CZ P07
Possibly other full size 9mm with threaded barrels, MAYBE a 10mm...