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Thanks and I kind of thought about if they would be reliable.If you're talking about 5.45, just treat it like .223, can't say anything about 7.62 but I'd assume you want a heavier buffer spring. For gas length, I'd just look at another AK and go similar. Or carbine length with adjustable gas block
Which is interesting because an AK74 is good for quite a few thousand rounds5.45 and 7.62x39 seem to be the only somewhat affordable ammo available these days. Still researching buffer weights and gas blocks myself. Leaning more toward 7.62x39 as 5.45 parts tend to be harder to find. Some research suggests that 5.45 tends to burn through barrels quickly. Anyone with experience on 5.45 barrel life?
I have an AR in 7.62x39mm. Two issues with it are 1) the weak-point is the thinned ring around the bolt face which is known to result in broken lugs (keep a spare bolt just in case), 2) weak primer strikes with the typical AR15 firing pin; it is just a tad too short to reliably touch off the primer in typical 7.62x39 ammo which have deeper recessed primers (I bought an extended firing pin to solve that issue, but those are hard to find). But given those, it shoots very nicely and eats cheap ammo.
True, for softer primers. But in my experience most 7.62x39 ammo have really hard primers so I'm not worried about it. I also didn't mention I had to install a high-power hammer spring to overcome those hard primers, in addition to the extended firing pin.An extended firing pin would also increase the risk of slam fires....
Cool and I was thinking about doing one in 762 and figured that the E-Lander mags would be great for it. Then I was thinking about the Faxon ARAK 21 and thought why spend $1100 on an upperI've built several Ar uppers in 7.62x 39. The combo of the specific barrel and mags I use make them very reliable and quite accurate compared to most ak's. For a 16" build, carbine gas works great and a h2 buffer is about right with the size of the gas port in the barrels I use. I have around 5000 rds through one and 1 broken extractor is all that I have had fail. I use a kak bolt with an enhanced firing pin. The lower I use has an alg trigger with standard springs and it ignites all ammo without fail. Cleaning it every 750 rds or so keeps it humming right along and I run a lot of wolf steel through it. With wolf military classic 123 hp ammo it shoots honest 1-1/8" 5 shot groups. This Ar goes to the range with me almost every trip.
I have the DuraMax for my GrendelC Products/ Dura mags in 20, 28, and 30 have never failed me. I've got a couple of SS mags. They've got a bad rap so we'll see.
Same!I have the DuraMax for my Grendel