expvideo
Member
I'm working on an AR-15 and I need a little advice on the lower parts and the barrel.
First of all, I have a CMMG receiver. I plan on getting a CMMG upper to go with it, and I want to have a very basic M4 style configuration. I've decided that I want to go with the 14.5" barrel with a pinned phantom flash hider, bringing the OAL to 16". I don't want to argue about that, so let's stay on topic.
Now it is my understanding, which could very well be wrong, that the military M4s have 1:7 twist barrels, and the 20" M16s have 1:9 twist. It is my understanding that 16"-20" should have the 1:9 and <16" should have a 1:7. I don't know if I am way off on this or not, since I don't know much about twist, in fact it's probably not even called twist, so you get the idea of how "vast" my understanding is.
Anyway, I will be using the rifle for home defense/SHTF, not for hunting or extreme marksmanship. I expect the rifle to be able to hit a target relatively easily out to 300+ yards. I will not be using super-awesome-elite-tactical-high-performance-kick-ass ammo, and will be sticking to cheap milsurp stuff (brass cased, not wolf). I will probably find one cheap milsurp cartridge and only ever buy that kind, so "variety of ammo" is not really a big deal. Probably some S&B or something.
So with all of those factors, what can you tell me about the barrel twist? Should I be going with a 1:9 twist, or going with a 1:7? Or, if you really want to be super-awesome, which bullet weights would be optimal for both twist rates (specific to the 14.5" barrel, please)?
Sorry to be so specific, but I have been searching all over the web and for some reason I can't find the answers to my question.
Next question.... I was thinking about sticking to CMMG for all of my parts, but I noticed that the DPMS lower receiver parts kit (trigger, hammer, springs, grip, etc.) is a bit cheaper and more readily available. Is the DPMS any good? Is the CMMG better? Is there one I should be considering instead, that's in the same price range ($50-70)?
And lastly, I am getting a quad rail system for the rifle, but I don't want to spend a fortune. I was thinking about getting a UTG quad for about $55. From the reviews I've read, it's really sturdy and everyone seems to love it. I think that for my budget (I have M4 taste and AK money... make that SKS money), it's probably the best I'm going to get. Since I'm not planning on putting any optics or lasers on it, just a flashlight and maybe a vertical grip, is this the best value for my money? Is there anything else that's competitively priced that I should be considering? I really don't want to spend more than $75 or so, and I definitely don't want anything that isn't drop in (so no free-floating one-piece deals). Simple is better for me. So is cheap.
Thank you all for looking and for any advice you might have. I appreciate it greatly.
BTW, Magpul P-Mags... Love 'em? Hate 'em? Anything I should be aware of?
First of all, I have a CMMG receiver. I plan on getting a CMMG upper to go with it, and I want to have a very basic M4 style configuration. I've decided that I want to go with the 14.5" barrel with a pinned phantom flash hider, bringing the OAL to 16". I don't want to argue about that, so let's stay on topic.
Now it is my understanding, which could very well be wrong, that the military M4s have 1:7 twist barrels, and the 20" M16s have 1:9 twist. It is my understanding that 16"-20" should have the 1:9 and <16" should have a 1:7. I don't know if I am way off on this or not, since I don't know much about twist, in fact it's probably not even called twist, so you get the idea of how "vast" my understanding is.
Anyway, I will be using the rifle for home defense/SHTF, not for hunting or extreme marksmanship. I expect the rifle to be able to hit a target relatively easily out to 300+ yards. I will not be using super-awesome-elite-tactical-high-performance-kick-ass ammo, and will be sticking to cheap milsurp stuff (brass cased, not wolf). I will probably find one cheap milsurp cartridge and only ever buy that kind, so "variety of ammo" is not really a big deal. Probably some S&B or something.
So with all of those factors, what can you tell me about the barrel twist? Should I be going with a 1:9 twist, or going with a 1:7? Or, if you really want to be super-awesome, which bullet weights would be optimal for both twist rates (specific to the 14.5" barrel, please)?
Sorry to be so specific, but I have been searching all over the web and for some reason I can't find the answers to my question.
Next question.... I was thinking about sticking to CMMG for all of my parts, but I noticed that the DPMS lower receiver parts kit (trigger, hammer, springs, grip, etc.) is a bit cheaper and more readily available. Is the DPMS any good? Is the CMMG better? Is there one I should be considering instead, that's in the same price range ($50-70)?
And lastly, I am getting a quad rail system for the rifle, but I don't want to spend a fortune. I was thinking about getting a UTG quad for about $55. From the reviews I've read, it's really sturdy and everyone seems to love it. I think that for my budget (I have M4 taste and AK money... make that SKS money), it's probably the best I'm going to get. Since I'm not planning on putting any optics or lasers on it, just a flashlight and maybe a vertical grip, is this the best value for my money? Is there anything else that's competitively priced that I should be considering? I really don't want to spend more than $75 or so, and I definitely don't want anything that isn't drop in (so no free-floating one-piece deals). Simple is better for me. So is cheap.
Thank you all for looking and for any advice you might have. I appreciate it greatly.
BTW, Magpul P-Mags... Love 'em? Hate 'em? Anything I should be aware of?