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chf
Hafnium carbide (HfC) is a chemical compound of hafnium and carbon. With a melting point of about 3900 °C it is one of the most refractory binary compounds known. However, it has a low oxidation resistance, with the oxidation starting at temperatures as low as 430 °C.Hafnium carbide is usually carbon deficient and therefore its composition is often expressed as HfCx (x = 0.5 to 1.0). It has a cubic (rock-salt) crystal structure at any value of x.Hafnium carbide powder is obtained by the reduction of hafnium(IV) oxide with carbon at 1800 to 2000 °C. A long processing time is required to remove all oxygen. Alternatively, high-purity HfC coatings can be obtained by chemical vapor deposition from a gas mixture of methane, hydrogen, and vaporized hafnium(IV) chloride. Because of the technical complexity and high cost of the synthesis, HfC has a very limited use, despite its favorable properties such as high hardness (>9 Mohs) and melting point.The magnetic properties of HfCx change from paramagnetic for x ≤ 0.8 to diamagnetic at larger x. An inverse behavior (dia-paramagnetic transition with increasing x) is observed for TaCx, despite its having the same crystal structure as HfCx.
Looking to sell my stainless Ruger 10/22 with cold hammer forged target barrel, black laminate thumbhole stock (from current gen. 10/22 Target), BX trigger, two BX-1 10 round mags & extended mag release. Not planning to sell the pictured Leupold. Small crack in stock, glued back together...
16" FN CHF barrel less than 100 rds fired $220
SPECS HERE
https://www.primaryarms.com/fn-america-16in-556-nato-cold-hammer-forged-carbine-length-ar15-barrel-government
Here is link to CHF Barrel model: https://www.bearcreekarsenal.com/5-56-nato-16-bn-chf-m4-barrel-1-8-twist-carbine-15-mlok-rifle.html
They have other complete AR15s in the same price range, sorry no manual loading rifles for WA folks...
Price Drop for quick Sale.
For sale is a complete PSA Sabre upper. Has a 14.5 Cold Hammer Forged FN Chrome lined mid gas barrel with 1/7 twist chambered in 5.56. The barrel is pinned and welded to 16 inches with a silencerco ASR flash hider for use with suppressors. Has a Geissele pinned gas...
Looking for a 20" AR barrel.
Cold hammer forged, heavy profile, chrome lined are the only 3 requirements.
Used it okay so long as its not entirely shot out.
Also open to a complete upper with the aforementioned barrel.
Thanks!
Looking to sell a used in excellent condition Noveske 16.1" Cold Hammer Forged Chrome Lined Lo-Pro Gas Block Barrel with Headspaced Bolt. I don't have an exact round count, but it's not high. There is a slight marring around the gas block pin from removing it. The only reason I'm selling it...
Brand new PSA upper with FN roll marked barrel. This is in A3 configuration [flat top with the pinned FSB]I installed a new BCG and put a carry handle on it and placed it on an A2 lower that I had sitting around. Its never been fired. Very nice upper with the chrome lined cold hammer forged...
ETA 3.0: Reduced again, how is this still here?
ETA: Reduced price again!
ETA: This was sold but the buyer flaked. So I reduced the price and relisted it! Probably as low as I'll go. I'll SBR it if it doesn't sell at this price.
I bought this new. I had it on my wish list but kept...
Bought this, put in a BCG/CH [not included] and mounted it to a pistol lower for safe storage. New, never fired. Upper shown is the one that you will receive! Comes with original box from PSA. Electronic payments preferred but snail mail works too. Thanks for looking!
I bought this new. I had it on my wish list but kept missing it whenever it came into stock. After about 1 year I snagged this one for $629 direct from PSA. I briefly installed a BCG [not included]and put it on a braced lower. I never even had time to buy an optic and FJB/AFT came along with...
10.3 Strike Fighter Barrel. 223 wylde, 1:8, CHF, 416RS Nitrided. (Contract overrun purchased and branded by Strike Industries, USA made!) Less than 100rnds.
Very accurate for a "10.5" style barrel.
Spikes branded Superlative Arms Adjustable Gas Block. Less than 100rnds.
Spikes melonited gas...
REDUCED Used, low round count. NO BCG included. Shows light wear from use and handling. Less than 200rds fired. Will come with black Magpul slimline handguards so the front sling swivel has been removed for clearance. F marked FSB. I'm living between 2 houses right now so pics will be up...
This is a palmetto CHF build. Not the $300 kit. The $600 kit. Sitemark optic Magpul pro rear flip up. Yes it's priced high. Wasn't looking to sell it. But with the incoming ban I want to see what I could get for it. $1500. OBO up for trades as well.
Save your hatred I really don't care
Brand new in the box. Ended up picking up a LMT Upper for my MK18 build. Save a little cash over new and keeps me from dealing with returning it.
These are pretty good uppers considering you get a chrome lined FN cold hammer forged barrel for a fraction of the price of a complete FN upper.
I...