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Posted: 1/19/2005 9:53:52 PM EDT
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I'm new to the AR field, having recently purchased my first one a week ago (a Bushy A3 20"). I'm interested in making it as accurate as possible and have searched the forums without much luck. Aside from the barrel, action, and trigger what parts affect the AR's accuracy? Where can I find information on modifying it to make it more accurate? Aside from the trigger is the accuracy dependant on the AR Upper and barrel? If so, could I just replace my upper with a varmint or match model and upgrade my trigger and have a rifle as accurate as their complete varmint and match models? Lastly, the makers of the 6.5 Grendel said that they had sometimes encountered problems using their uppers and magazines with Bushy lowers due to a slight deviation in the interior size of the Bushy's magazine well from Mil-Specs. Have any of you encountered any problems with this? Thanks for your help. |
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I don't know if this helps you any: But I have an A3/A4 flat top upper with a Bushmaster 24" H-Bar profile (chrome lined, 4150 steel, 1 in 9 twist), Ameetec lower with regular A2 FCG. Using XM193, I'm shooting 0.5" groups at 25yd (~2 MOA), and ~3" groups at 100yd (~3 MOA). I'm not the best shooter and can do a lot better with improved trigger pull. |
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Hello! I am new to AR15's myself, and I have gone a opposite route from you, opting to build a battle rifle instead of a long distance tack driver. Forgive me if my reply is out of place here. Do you plan on improving the already existing Barrel/Upper or going as far as getting a totally different upper altogether? Yes, accuracy IS affected by the AR's barrel, and when using optics Barrel/reciever allignment is an issue. Things you might consider to add for accuracy: Muzzle Compensator. (Like Bushmaster's Y-Comp & Mini Y-Comp). This brake is VERY effective for reducing muzzle rise and felt recoil. It does have it's drawbacks though, namely NOISE. They are some of the LOUDEST muzzle brakes out there. Wolff Extra Power Recoil Spring. According to Bushmaster, your rifle has a RH 1:9 twist in the barrel. While this is a really good 'All Around' twist rate, but if you are planning on changing your barrel, a 1:7 twist will allow you to shoot higher grained bullets through your rifle which should increase long distance accuracy. A 'Bull' Barrel will cut down on barrel Whip. A free-floating fore end will also add accuracy. It allows for the barrel to 'float' not touching a stock or anything else that can effect barrel performance. A 2-Stage trigger. Your A3 comes from Bushmaster with a Single Stage trigger. The 2 stage will allow for more precise shooting. A GOOD scope is a must if you plan on doing a lot of long distance precision shooting. I would also ecomment A.R.M.S. for a "SWAN" accesory rail o be mounted directly to youd A3reciever for added stability. Depending on the type of shooting you are planning on doing, a Bipod makes a difference. Experiment with different types and brands of Ammunition. You need to find rounds that YOUR rifle likes to 'eat'. Every gun is different. What may work well for you, may not for someone else. Stay away from military surplus type rounds like the XM193's and M855's. These rounds were designed with high velicties in mind, NOT accuracy. Hope this helped. |
Consistant 0.5" groups from an AR15 are certainly possible, but you pay a heavy price for it. There are several upper builders who promise 0.5MoA, but I don't know them all off hand. Basic rifle will probably be in the 1.5 to 2 MoA range. I actually have a beater DPMS that will pretty often give me sub-MoA performance with reloads so you can get lucky with a basic rifle too. If want the most accurate semi-auto you can put together, it can be done. Often, at the sacrifice of ammo selection, and robustness. I'm sure lots of others can provide you with a good list of parts and considerations. It is hard not to enjoy going down to the end of a football stadium and seeing that 5 or 10 rounds are all inside a 1" circle. I always love when the Elmer Fudds tell me my semi-auto is not accurate and I shoot a 0.7" group from a bipod while they have shots all over the paper with their sandbags, rests and shoulder cannon. Most guns will outshoot you, so make sure you know which is which. I couldn't come close to what I'm shooting now just 1 year ago, now I can do better with irons than some I see can do with a scope. I don't know your level of skill but what you want is possible for sure. |
Bushy makes some of the best 'General Purpose' chrome lined barrels - they would not be my first selection for a 'Accuracy over all else' rifle.
??? Did you not visit the competiton forum and look/ask there. Those guys are heavily into accuracy.
That's pretty much it. Make sure the stock and pistol grip fit you well, free floating the barrel is always good, as is having a matched set bolt & barrel (Bushmaster sells a matched set with their competition DCM barrel).
Competition forums, or even ask in the Rifles & Uppers forum.
1) Most important is the person shooting. 2) Ammo is critical 3) Barrel is critical (you can have the best barrel - but if you have crappy ammo you are not going to shoot well). I'd also look into free floating the barrel. 4) then I'd look at a good two stage trigger.
Yep pretty much. ARs are great aren't they?
 of all the manufacturers (other than Colt) Bushy is the closest to the specs. Grendle just doesn't want to admit their QC isn't up to snuff. While It's possible there are Bushy's with bad magazine wells (hey they put out more AR-15 than any other company - including Colt) I wouldn't worry about it. I've never seen it (and I've seen plenty of Bushmasters and own several myself), and should it be a problem Bushy is good about fixing/replacing. |
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