aron82
Well-known member
Would love one, but they aren't exactly making any for import in the last 30 years.Valmet
Parts are hard to come buy and they prebans aren't worth the premium they command.
Would love one, but they aren't exactly making any for import in the last 30 years.Valmet
I ended up buying the Kalashnikov USA one for 1K. I just didn’t see the point in buying the arsenal one for an additional 1K. Bought a couple mags and 1K rounds. If it doesn’t run then I will get the arsenal one when I get back home. Going up on the mountain in a bit to melt the barrel off of it.
They... are like armalite ARs made after the '70sI had a minute to do some research last night. I bought the KR-103. It has forged trunnions, chromed barrel etc.. I like the idea it is made by Kalashnakov for some reason.
Metal injection molding. Pot metal.What is MIM?
Metal injection molding. Pot metal.
well it's hyperboleI don't think those are even on the same planet.
should wear well but it's one of those tech method's that I'd be worried on testing the first couple hundred. It should be a pretty easy process to control for repeatability and HT though.
huh, what I saw was more like bearing spalling,I’m no expert but my understanding of it is that it’s similar to ceramic. Hard, durable, low friction, but prone to fracturing in some cases,
I’m not in the industry, so I’m just parroting what I’ve seen and heard, but it’s basically been several examples of this. (Post #4)huh, what I saw was more like bearing spalling,
my experience is in some injection pump internals, a VE pump drive coupling cross (from the input shaft to the camplate), so something that reciprocates under heavy torsional load.
Not so much fracturing, but the wear surface kinda breaks down at the bonds between grains.
IIRC parts aren't pressure sintered in a die in this process like an oilite bearing or a spur gear, they're just baked in an oven with an inert atmosphere and allowed to shrink together naturally. There's a large amount of shrinkage from the as-molded part to the completed part.
are there really MIM'd AR bolts now?I’ve seen AR’s shear off bolt lugs before, so I’d think some wear from a softer material and rounding of edges was preferable to cracking.
Horrendously expensive to tool up for.this
AKs are actually horrendously expensive to make,
This.Not so much fracturing, but the wear surface kinda breaks down at the bonds between grains.
Haha even the cheapest AR has decent quality cast upper and lower receivers, so they still look and feel smooth and ergonomic. Material quality is a huge difference though especially when comparing cheap new production ARs with surplus parts kit AKs or European import AKs. A cheap $500 AR will be shot to shit in less than 5k rounds and the barrel will be punching buckshot pattern groups, whereas the AK will be humming along and asking for all the abuse you can throw at it.
AKs we're designed in 1940s Russia and ARs were designed in 1960s America where everything was getting the cast/smooth treatment. Forged AR and AK receivers are the best of course, but I will take a stamped steel gun over a cast aluminum gun all day every day.
They're all just tools at the end of the day. I don't own anything just to own it, it's for a purpose even if that purpose is 99% "shoot shit because shooting shit is fun".