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Posted: 8/25/2014 12:07:27 AM EDT
[#1]
5.45 has a different bolt, usually requires a stronger hammer spring, a lighter hammer (faster) and a slightly modified firing pin to go a little deeper into the primer. Getting one to run on FA might drive you a little crazy.
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Posted: 8/25/2014 2:17:45 AM EDT
[#2]
I ran a case through my RDIAS with a spikes upper and the only thing I needed was a Wolfe extra power hammer spring. Now that the cheap ammo is cut off I sold the upper and got 7.62x39 upper instead.
Upper ran fine though, just had to clean it more often than my 5.56 uppers. |
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Posted: 8/25/2014 2:27:33 AM EDT
[#3]
Quote HistoryQuoted:
I ran a case through my RDIAS with a spikes upper and the only thing I needed was a Wolfe extra power hammer spring. Now that the cheap ammo is cut off I sold the upper and got 7.62x39 upper instead. Upper ran fine though, just had to clean it more often than my 5.56 uppers. I did the same except dedicated the rifle to 7.62. I already had a SKS and a bunch of ammo for it. I wanted an AK, but, other than a familiarity with them, I wasn't all that interested in getting tooled up for them. Barrel, muzzle device, bolt, hammer spring, and mags and I was up an running. |
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Posted: 8/25/2014 12:15:13 PM EDT
[#4]
Quote HistoryQuoted:
I did the same except dedicated the rifle to 7.62. I already had a SKS and a bunch of ammo for it. I wanted an AK, but, other than a familiarity with them, I wasn't all that interested in getting tooled up for them. Barrel, muzzle device, bolt, hammer spring, and mags and I was up an running. Quote HistoryQuoted:
Quoted:
I ran a case through my RDIAS with a spikes upper and the only thing I needed was a Wolfe extra power hammer spring. Now that the cheap ammo is cut off I sold the upper and got 7.62x39 upper instead. Upper ran fine though, just had to clean it more often than my 5.56 uppers. I did the same except dedicated the rifle to 7.62. I already had a SKS and a bunch of ammo for it. I wanted an AK, but, other than a familiarity with them, I wasn't all that interested in getting tooled up for them. Barrel, muzzle device, bolt, hammer spring, and mags and I was up an running. I occasionally drop my 5.45 upper on one of my FA lowers. Occasional FTF from the hard primers, as I run regular hammer springs in all my FA lowers, but it generally runs pretty well in FA. If I were to make it a regular configuration, I'd change up the FCG components for better reliability with the 5.45 milsurp ammo. |
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Posted: 8/30/2014 7:25:31 PM EDT
[#5]
Quoted: i have a m16 in route to my ffl. does anyone run a 545x39mm upper with there m16? i know on a 762x39 you normally have to use a stronger spring but is it the same on a 545? normal buffer spring, normal fp. file down the end of the bolt, wolff hammer springs in all my guns since 545 is all but gone, i quit shooting it, only have about 13k left |
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Posted: 9/29/2014 10:20:12 PM EDT
[#6]
Tag for future use.
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Posted: 9/30/2014 7:18:36 AM EDT
[#7]
I've run close to 20K of corrosive 5.45 to do gas port erosion testing for our patented gas block.
In the video below, I was running an H2 buffer, white (standard power) Sprinco spring and Geissele SSF trigger with supplied springs - had one failure to fire.  In the video below, I was using the same setup except it was a standard Colt FCG with a Wolf XP hammer spring: |
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