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Old February 28, 2009, 06:21 PM   #1
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AR-15 chambered in a .243

I want an AR-15. But I just don't think the 55 grain .223 is big enough. Does anyone have experience with a .243 AR-15? Is there a quality difference between Double Star and Bushmaster and DPMS? Someone here told me a well lubed AR-15 will shoot dirty. Exactly how do you lube it and can I expect complete reliability. Last question, what's the difference between AR-15 and an M4?
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Old February 28, 2009, 06:33 PM   #2
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m4 has 14.5 inch barrel. Civilian m4geries have a 16 inch barrel and are just called m4s. m16s have a 20 inch standard barrel. I thought it was the ar-10 that came in 243 though? Its the 308 predecessor to the ar15.
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Old February 28, 2009, 06:35 PM   #3
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Yes, the .243 chambered AR rifles are AR-10 variants. Longer magwell to accomodate the longer case based on the .308.

I have no experience with them personally, other than wanting one.

A good rundown on lubrication and maintenance:
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Old February 28, 2009, 06:51 PM   #4
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Lube the rails on the bolt carrier, the bolt locking lugs, the bolt body, the cam pin, and the chamber inside the bolt carrier where the bolt rides. Use a heavy lubricant like CLP, Weaponshield, or MGL, and apply generously. If cycling starts to get sluggish after a few hundred rounds, squirt some lube into the vent holes in the side of the bolt carrier and keep on keepin' on. Cleaning the bolt carrier assembly regularly will reduce wear on parts, but an in-spec weapon firing good ammunition should stay running indefinitely just adding more lube when it starts to slow down. If you can afford enough .243 ammo to wear out the bolt assembly, replacement parts are just pocket change anyway.
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Old February 28, 2009, 06:57 PM   #5
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If you want a .243 in AR-15, look at the 6.8 SPC. The ballistics are very similar, and you can keep the more compact and lighter AR-15 package. To be fair and to avoid a thread derailment, yes, the 6.5 Grendel would fill the same niche as well. They're all in that medium weight bullet, ~2900fps range.
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Old February 28, 2009, 09:04 PM   #6
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If you reload, you could always go with a 6-223. A 6mm (.243) bullet in a .223 case. As with most compromises, not as fast as a .223 or .243, but a 6mm bullet in an AR platform.
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Old February 28, 2009, 11:11 PM   #7
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Since the OP apparently knows little-to-nothing about ARs, maybe he's just incorrectly assuming that a 5.56 AR won't fit his needs. I'd suggest to the OP that he do a little more research, before reaching out to .243 or .308 in the AR platform. HINT: You aren't limited to 55 gr bullets in .223/5.56!!!
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Old March 1, 2009, 12:00 AM   #8
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yeah, with bullets such as the 55 Grain Vmax, or 75 Grain AMAXs , the 223 can be a real zappem dead rifle.
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Old March 1, 2009, 12:36 AM   #9
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I have fired several AR-15 but I've never owned one. I am turned off by a round that is considered much to light to humanely kill a deer. I do know that a .243 is much more powerful, flatter trajectory, less affected by cross-winds and penetrates much better than a .223.

What I don't know is whether are not there is a good reason to avoid an AR-15 or AR-10 chambered in a .243.
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Old March 1, 2009, 12:47 AM   #10
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you will not find a Ar15 in 243. A 243 will not fit in a Ar15 mag. Their is Ar10s in 243.. being a derivitive of the 308.. 762 nato. A 223 will humanly kill a deer. I have killed lots of them with it. Hit them in the head, they are dead before the bullet exits the backside of thier skull. Thats the beauty of the 223, accurate, and fast. No recoil.
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Old March 1, 2009, 12:53 AM   #11
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Check out the Remington r-25, you can get it in .243, 7mm-08, .308 or the Rem .30. Remington is now owned by the same investment group that owns Bushmaster and DPMS and are essentially the same rifle with a couple Remington twist to them. Nice, accurate rifles that come with real tree camo for roughly the same price as a Bushmaster or DPMS.
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Old March 1, 2009, 01:13 AM   #12
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I like how the Manufacturing companies have started putting out, neutered Ar15s/10s. For hunting. Nice job! seriously, makes them alot more, uhm, accepted.
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Old March 1, 2009, 01:31 AM   #13
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I own the DPMS .243L . Let me tell you it's one of my favorites I took out a good size doe with it with no problem. The .243 is a fine deer round don't let anybody sway you away.

I was skeptical of the round for white tail, but when I saw the round clear the body out the other side I became a believer with no doubts.

The rifle shoots real nice and extremely accurate. I PROMISE you won't regret it if you decide to make the purchase.
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Old March 1, 2009, 02:38 AM   #14
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they make sevral (bolt on) kits for the AR-15. 243wsm, 204, 45, 9mm, 22 ext... Personaly i do fancy the 243WSM kit but just dont have the funds for it. Do some research theirs lots of cool AR stuff out their!!
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Old March 1, 2009, 10:39 AM   #15
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Catfish, I shoot a DPMS LR-308B, the same platform that is offered in .243 (as well as .260 and 7mm08). Reliability is not a problem, accuracy is fine, parts are easy to come by, what else needs be said?

BUT, it is a significant price point jump into the .243/.308/7mm08/.260 sized AR-10 over the AR-15. Make sure you take that into account, as it easily surpasses the price point of bolt action and single shots. Not sure if Browning offers their BAR or Remington offers their 7400 in .243, but if your core requirement is for a semi .243 and the platform doesn't matter, just a thought.

There are other offerings for the AR-15 like 6.8 SPC, 6.5 Grendel, .243 WSSM, .25 WSSM, etc. If you search the threads, a couple months ago someone compiled all the calibers that you can get an AR in. I would advise you to investigate ammo availability, as some of them are kinda remote and limited in their offerings.

The difference between an AR-15 and M-4. hmmm.... The manufacturers have really blurred this line with a plethora of designators that can bewilder even the experienced.

The M-4 is the military-issue carbine that incorporated some refinements from previous M-16s. The shorter length barrel and adjustable stock makes it better for close quarters work and the current models sport flat-top uppers which make them a lot more optics friendly. That's the Cliff Notes on it. What most manufacturers have done is use the same barrel/upper configuration combined with a 6-pos stock to mimic the military's configuration, but they obviously lack a 3-round burst capability.
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