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Thread: 300 blk pistol build...
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24 September 2016, 16:35 #1
300 blk pistol build...
I am going to put together a cheapy 300blk pistol build which I will have with me on a daily basis instead of my pws pdw sbr.
things I want:
8-9.5 " barrel
MI g3 lightweight keymod (or mlok?) - or this type
.30 flash hider
kak shockwave
law tactical folder (already have)
low pro gas block (prolly geiselle)
stuff I need:
complete bolt assembly (i have a carrier already)
charging handle
upper dust cover
forward assist
stuff I have:
complete pistol lower with pistol tube
triji MRO (or maybe some other rds...)
opinions? considerations?
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24 September 2016, 19:20 #2
For inexpensive quality: Faxon or BA barrel.
Do you plan to plan to use linear comp tucked under rail?
For a beater, I'd consider a little more beefy rail, like Geissele MK4/8.
I have a like new KAK shockwave if you're interested.
Have you considered an upper without dust cover? It's one less thing to fiddle with for a daily packer. I don't care for forward assist but I know it's a preference for some.
I like the MRO. I wouldn't go with something less durable for daily use. That means you also need to add a mount to your list if you don't have one.
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24 September 2016, 20:38 #3
Check out the Ballistic Advantage barrels. They frequently have pistol length 300 BLK barrels on sale, such as this: http://ballisticadvantage.com/8-inch...ce-barrel.html
And then order the pinned low pro gas block w/ the barrel for $40 extra (includes gas block and pinning service). Note that the Geissele Super Gas Block can be too big for some of the very skinny handguards like the KMR
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25 September 2016, 02:48 #4
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25 September 2016, 02:49 #5
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25 September 2016, 09:34 #6
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25 September 2016, 09:44 #7
Nevermind you already found a rail.... I was going to suggest the Kaw Valley Konza rails. Good choice for cheapy builds, especially pistol ones.
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3 January 2017, 12:16 #8
OK...soooooo...
I finally got a muzzle device and it doesn't fit on the barrel. Figured I was derping and may have bought the wrong one.
Double checked online, nope advertised as right size. Went to a local gunsmith I trust and he said the Ballistic Advantage barrel threads are out of spec and/or whoever cut them did so in a hurry as they aren't the advertised thread.
I emailed BA but no response yet...anyone have a contact over there? I'm hoping they can swap it out.
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3 January 2017, 14:33 #9
Could be worse. You could have been spinning on a direct thread can and have it lock up solid. Then you could send it to the suppressor manufacturer who clearly sends you photographs of the jacked up thread dimensions he's checking for you and have them still deny it's their fault.
FYI I've also had that same issue with 2 different Rainier Arms barrels... You can draw your own conclusions but everything I've said here is true. Coincidence or same machine shop I'm not 100% sure about. Not a big deal as I gauge out the threads and touch up if needed but it sure pisses you off when you don't expect it.
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3 January 2017, 15:47 #10
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3 January 2017, 16:53 #11
Try other brakes if you have some handy. Or a thread protector. I'm specifically speaking about direct thread suppressors in my cases. Even a Silencerco direct thread would not go on the two RA barrels where all their muzzle devices worked although very tight going on.
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3 January 2017, 21:30 #12
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4 January 2017, 03:55 #13
I had a barrel like this. Used a Snap-on Die and chased the thread on it for several days a couple passes at a time. Went slow, used lots of cutting lube (used motor oil), and just took my time. Overall, the thread pitch didn't change, but the grooves deepened. The MD doesn't spin on like it's on bearings, nor should it. Got the new MD on, double checked alignment, and it works great.
That's the method for a barrel you're stuck with. I'd send yours back. BA is good people, don't be afraid to exchange.There's no "Team" in F**K YOU!
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6 January 2017, 13:52 #14
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18 January 2017, 15:19 #15
I just can't win with this build...
So BA sent me an RMA for the barrel, cool.
Except I can't get the MI barrel nut off the RA upper. All four of the grooves stripped. I called MI and the tech was like "just put a torch to it." Ok....did that, now they are completely stripped and after trying with a strap wrench for thirty minutes I'm done.
Will see if BA will do the work for me or if I have to send it to MI to fix and send back to me.