FISH1 Posted August 2, 2011 Report Share Posted August 2, 2011 ??? Totally new to the AR Bushmaster 308 flat top, I have many questions, will any of you help me out? I have never had a weapon like this in my life. I suppose a lot of my questions are basic in nature I think. 1. What is the difference between a AR 10 & 15? 2. I have a .308 Bushmaster flat top, brand new out of the box, is there a builder for it? (IPB) 3. I hear different abbrev. what do I have? or how do I go about figuring out what I have? As you can see I am a idiot with a sever lack of knowledge when it comes to this type of weapon, where do Ii start, HELP? Quote Link to comment Share on other sites More sharing options...
edgecrusher Posted August 2, 2011 Report Share Posted August 2, 2011 well congrads on your purchase, but i am a little confused by your questions. the first question, the ar 15 is a smaller version chambered in many different calibers from .204 ruger to 6.8 spc. and everything in between. mechanically they are similiar and even share parts in some instances. to be specific though an ar 10 is an armalite only, every other is a .308 ar. your other questions is where i get confused, is there a builder? uh, bushmaster?(recently purchased by dpms i believe) not sure what you are looking for here. flat top receivers are optic ready, you only need to chose an optic and a mount.your third question i cannot even begin to answer, unsure what you are asking, hope i helped a little Quote Link to comment Share on other sites More sharing options...
MrConcealed Posted August 2, 2011 Report Share Posted August 2, 2011 Welcome Fish,I think Edgecrusher answered most of everything. I just finished putting a Bushmaster ORC together myself. Everyone here will be more than happy to assist you as you need help. If you have specific questions in regards to accronyms, or components, just post them and they will be answered. I would recommend that you spend some time looking through the forum. At some point someone else has asked the same exact question. There is a HUGE amount of information here for you to digest. And the Bushmaster is essentially a DPMS. Glad your here and have fun, Quote Link to comment Share on other sites More sharing options...
FISH1 Posted August 2, 2011 Author Report Share Posted August 2, 2011 Thanks for your reply, so if I am understanding you I have .308 AR.I guess when looking for add-on parts or acc. I need to look specifically at .308 AR items? I have been browsing and it seems to me there isn't a lot after market parts for the Bushmaster or am I wrong or not looking in the right places? In answer to my question #3 Mid-lenght, ORC, LR.Am I correct in thinking, I can order most any .308 AR part and it will be interchangeable?....Russ Quote Link to comment Share on other sites More sharing options...
FISH1 Posted August 2, 2011 Author Report Share Posted August 2, 2011 Thanks Mr. Cocealed, your correct in that there is a lot of information to take in on this weapon(WOW)by the way Brownells catolog # 5 has been replaced by #6, they have #5 listed on the home page of this sight. Am I right in that DPMS and Bushmaster are the same so parts are interchangeable?....Russ Quote Link to comment Share on other sites More sharing options...
98Z5V Posted August 2, 2011 Report Share Posted August 2, 2011 Parts between the Bushmaster .308 AR and the DPMS LR308 (model designation) will be interchangeable.Mid-length: refers to the gas system length used to cycle the weapon. Other lengths for DPMS-based guns will be Carbine-length (shorter than mid-length) and Rifle length (longer than mid-length). All this refers to the length of the gas tube and the position on the barrel of the drilled gas port (and gas block location).ORC: "Optics Ready Carbine" - it's got a 16" barrel and a flat-top upper, and I'm pretty sure it's got a picatinny rail gas block (place to put your front sight).LR: The DPMS designation for the .308 AR, i.e., "LR308."If you find parts that will work on a DPMS LR308, or any other parts that are made for the DPMS-pattern .308 AR, then they'll work on your Bushmaster. Quote Link to comment Share on other sites More sharing options...
edgecrusher Posted August 3, 2011 Report Share Posted August 3, 2011 ahh the old acronyms, now it's becoming clear. dpms parts will definately work, anything lr.308, will mostly , and basically anything you see that is not specifically labeled for an armalite. there is so many places and things to look through and shop that if you need suggestions or directions, ask and yee shall receive. if you see a rifle that you want to model yours after or parts you want to know if anyone has used, also ask. although daunting at first, parts are generally easy enough to swap or replace and we can help there too. Quote Link to comment Share on other sites More sharing options...
FISH1 Posted August 3, 2011 Author Report Share Posted August 3, 2011 Thank you very much.I think I may enjoy this sight and the people, again many thanks.....Russ Quote Link to comment Share on other sites More sharing options...
imschur Posted August 3, 2011 Report Share Posted August 3, 2011 take it easy on yourself your not an idiot. If it wasnt for these questions there would be no reason for this site. We all have to start someplace.thanks for joining. Quote Link to comment Share on other sites More sharing options...
FISH1 Posted August 3, 2011 Author Report Share Posted August 3, 2011 One last question,I have the .308 Bushmaster Flat top ORC w/16" barrel which one of the following would mine be considered: carbine, mid-lenght of rifle?....Russ Quote Link to comment Share on other sites More sharing options...
edgecrusher Posted August 3, 2011 Report Share Posted August 3, 2011 16" is considered a carbine, 18" is a mid-length, 20" or greater rifle length. also i believe sbr's(short barreled rifle) also use carbine parts, but i'm not sure. yours is definitely a carbine, and if you are asking about hand guards, you can use a longer length if you use a low profile gas block. that all depends on your personal preference on it's appearance. Quote Link to comment Share on other sites More sharing options...
FISH1 Posted August 3, 2011 Author Report Share Posted August 3, 2011 Thank you, I'm not the point of changing out parts just yet, but in time...Russ Quote Link to comment Share on other sites More sharing options...
98Z5V Posted August 4, 2011 Report Share Posted August 4, 2011 Well, it's getting confusing here a little... Let's look at this.Any rifle that has a barrel that's around 16" is a "carbine," and not a rifle. Barrels longer than 16" (militarily, they're 20" for the standard issue) are "rifles."So, that's "Rifles" and "Carbines."That's completely separate from the gas operating systems that are available. Like comparing apples to hammers. Nothing to do with each other, in the present day. Specifically, militarily, the M4 Carbine has a 14.5" barrel, and the A2 flash suppressor on the end. Total length of that combo, even though the FH isn't pinned, is just under 16" (pinning FHs on barrels less than 16", in order to bring barrel length to the legal 16" BATF minimum for ownership sans special papers, is a civilian thing - it doesn't pertain to military rifles). Hope I didn't muddy the waters anymore with that info...Gas systems have specific lengths to them, which are pretty much standard, unless you're talking about Armalite gas systems. I'll stay out of that for now.Carbine length gas system: 7.5" gas tube, designed around the mil issue 14.5" barreled M4 carbine.Rifle length gas system: usually around 13" gas tube, designed for the mil issue 20" barreled M16.Mid-length gas system: approx 9.5" gas tube, designed primarily for the civilian-legal 16" AR-15 "carbine."Notice similarities up there? I'll discuss further in a few. Quote Link to comment Share on other sites More sharing options...
98Z5V Posted August 4, 2011 Report Share Posted August 4, 2011 There's also a pistol-length gas system, using a tube about 4.5" long, and used initially on the 7.5" barrels when they came out. Pistol-length gas systems can be found on barrels out to about 10" now.We can leave pistol gas out of it for now, because it's so much less common. It's going to get more common soon, with the 300BLK out now. Quote Link to comment Share on other sites More sharing options...
MrConcealed Posted August 5, 2011 Report Share Posted August 5, 2011 Fish,The Bushmaster 308 ORC is a 16" carbine with a Mid length gas system.Bushmaster has been purchased by DPMS, and as such, thats really what the BM ends up being. I just finished one myself (almost, 20" barrel is in the mail....) so if you have any questions, please dont hesitate to ask.Range day tomorrow :D Quote Link to comment Share on other sites More sharing options...
FISH1 Posted August 8, 2011 Author Report Share Posted August 8, 2011 Thanks for the offer.Why did you go to 20" barrel, other than muzzle volicity and maybe range?I have had mine for about ten days and haven't been to the range, I want to know the ins and outs, complete beakdown and such. I have a guy I'm seeing today to give me such a rundown, so hopefully a range session this weekend. How was the recoil on yours?, Do you reccomend a different flash/compensator? My trigger feels pretty sweet. Quote Link to comment Share on other sites More sharing options...
MrConcealed Posted August 8, 2011 Report Share Posted August 8, 2011 20" barrel for the increased velocity. Initially the recoil was ridiculous. Added the JP adjustable gas block, and JP Tactical Compensator (Muzzle Brake) to tone it down a bit. I can shoot it all day long now, made a huge difference. Stock trigger was pretty rough so replaced it with a Geissele and love it. So much I just ordered another for my AR 15. Get it to the range and shoot it, it will tell you everything first hand. Post and tell me how it went. Quote Link to comment Share on other sites More sharing options...
FISH1 Posted August 8, 2011 Author Report Share Posted August 8, 2011 Sounds good, what p/n compensater(muzzle brake) and gas block?I am going to stick with my trigger for now at least till I put a few hundred round threw it, I have found through my hunting rifles that like breaking in a barrel, triggers often lighten up after a short while. Quote Link to comment Share on other sites More sharing options...
FISH1 Posted August 8, 2011 Author Report Share Posted August 8, 2011 Guess I should of asked which P/N JP compensator(muzzle brake) & Adjustable gas block would I need for my stock weapon? Quote Link to comment Share on other sites More sharing options...
edgecrusher Posted August 8, 2011 Report Share Posted August 8, 2011 you don't have to change the gas block to an adjustable gas block unless: 1. you want to 2: you think you're rifle isn't functioning properly and is over-gassed 3: need a lo pro to get a rifle length hand guard on Quote Link to comment Share on other sites More sharing options...
MrConcealed Posted August 10, 2011 Report Share Posted August 10, 2011 I agree. I wouldnt change unless you feel it necessary. Take it to the range and see how it shoots. As far as which ones if you decide to change, there are loads of them out there. The threads on that barrel are 5/8-24 TPI. The JP Tactical Compensator is JPTRE-324 http://www.jprifles.com/1.4.3_tre.php but again, there are a lot of choices out there. The adjustable gas block is JPGS-2B http://www.jprifles.com/1.4.6_gs.php but JPGS-5 is a low profile, just kinda depends on what your plans are. Quote Link to comment Share on other sites More sharing options...
FISH1 Posted August 10, 2011 Author Report Share Posted August 10, 2011 I'll be at the range Friday "FINNALY" Thanks for all the info, I am sure I will be in touch. Quote Link to comment Share on other sites More sharing options...
imschur Posted August 10, 2011 Report Share Posted August 10, 2011 I'll be at the range Friday "FINNALY" Thanks for all the info, I am sure I will be in touch.Have a blast! Quote Link to comment Share on other sites More sharing options...
survivalshop Posted August 10, 2011 Report Share Posted August 10, 2011 Sounds good, what p/n compensater(muzzle brake) and gas block?I am going to stick with my trigger for now at least till I put a few hundred round threw it, I have found through my hunting rifles that like breaking in a barrel, triggers often lighten up after a short while.Not an AR trigger. They are very good combat triggers, but if you get into longer range shooting or hunting , they fall short.I have some that are tolerable ,but nothing like a good match trigger . Quote Link to comment Share on other sites More sharing options...
ltxx84 Posted October 19, 2011 Report Share Posted October 19, 2011 Im planning on buying the bushmaster moe .308. do you guys know if there's a gas block (picatiny) available for it so i can use a front flip-up sight? Quote Link to comment Share on other sites More sharing options...
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