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Thread: Need custom gunsmithing for my Ruger SR 556

  1. #21
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    First things first..

    The SR556 is, at best, a 1-2moa carbine in it's factory condition. Hitting 8 inch groups at 300 isn't that bad considering. Especially with mil surp ammo.

    I have one of these in the shop that a client of mine has modded and remodded and will probably mod again! It's cost him over $2k in parts and labor to make his weapon only marginally better than factory.

    Have I given him advice that sounds suspiciously like it came out of one of M4.nets carbine guru's mouths.. hell yes! Does he listen? Hell no!!

    Please.. and I do mean please listen to these guys. They know what they're yapping about.

    Things about the stock SR556 that IMHO need changing immediately.

    A) Barrel. The stock barrel sucks just a bit. (i'm being nice too)

    B) Trigger The stock trigger is gritty/crunchy. I encourage people to put Timney's or Geisslle's in them. Although I think putting a G-trigger in a SR556 is polishing a turd.

    C) Stake the castle nut. (out of 10-12 that I've worked on NONE of them were staked.)

    D) Muzzle device This wep is one of the few carbines that needs an MB on it. (muzzle brake) I recommend PWS556's and Z-Comps as suitable.

    YMMV of course but, if as everyone else in this thread has mentioned, if you couple good glass with good ammo AND a good trigger your results will improve.

    anything else will be pilot error

  2. #22
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    Thanks again, Moon

    Quote Originally Posted by Iraqgunz View Post
    Longer barrels do not equate to more accuracy. What they do provide is more muzzle velocity. If myself and others can hit steel at 500 yards with an SBR you can hit it with yours assuming its not a turd.
    I'm learning a lot here from everyone.

  3. #23
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    How close are your groups?

    Quote Originally Posted by markm View Post
    Yep.. we've stretched a 12.5 out to 700 with 69 gr SMKs and an ACOG...
    I don't expect to drive nails out that far. Just hitting the target at that range would get me stoked.

  4. #24
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    What's your take on Polygonal Rifling?

    Quote Originally Posted by The_Hammer_Man View Post
    First things first..

    The SR556 is, at best, a 1-2moa carbine in it's factory condition. Hitting 8 inch groups at 300 isn't that bad considering. Especially with mil surp ammo.

    I have one of these in the shop that a client of mine has modded and remodded and will probably mod again! It's cost him over $2k in parts and labor to make his weapon only marginally better than factory.

    Have I given him advice that sounds suspiciously like it came out of one of M4.nets carbine guru's mouths.. hell yes! Does he listen? Hell no!!

    Please.. and I do mean please listen to these guys. They know what they're yapping about.

    Things about the stock SR556 that IMHO need changing immediately.

    A) Barrel. The stock barrel sucks just a bit. (i'm being nice too)

    B) Trigger The stock trigger is gritty/crunchy. I encourage people to put Timney's or Geisslle's in them. Although I think putting a G-trigger in a SR556 is polishing a turd.

    C) Stake the castle nut. (out of 10-12 that I've worked on NONE of them were staked.)

    D) Muzzle device This wep is one of the few carbines that needs an MB on it. (muzzle brake) I recommend PWS556's and Z-Comps as suitable.

    YMMV of course but, if as everyone else in this thread has mentioned, if you couple good glass with good ammo AND a good trigger your results will improve.

    anything else will be pilot error
    I've been learning a little about the barrels that Black Hole Weaponry produces and am getting intrigued.

    Changing the triggers might help me too. I don't have much recent experience with other rifles to make a comparison yet. The last time I shot an AR before this one was 12 years ago, shooting stock A3's on my Navy LCU. They were virgins when we broke them out.

  5. #25
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    BEFORE CHANGING ANYTHING ON THE RIFLE- before changing the barrel, the upper or the trigger- CHANGE THE AMMO!

    The M855 ammo isn't made for accuracy but to be produced in mass quantities. 8 inches at 300 yards is less than 3 MOA and is a little better than average.

    I have a 20" rifle with a Lothar-Walther barrel that shoots 7 inch groups at the same range with the same ammo. But it will shoot well under 1 MOA with the right load.

    A shooter cannot know what the true potential of a rifle is until it's tested with good quality ammo. Replacing the barrel or upper or trigger is a waste of money if you are not going to shoot good ammo.

    Before replacing the trigger, remove it from the lower and clean it up. Then, lube the sears, pins and the bottom curve of the hammer with grease and re-assemble. This will go a long way to smoothing out an AR trigger and making it predictable
    Last edited by MistWolf; 01-23-13 at 19:12.
    INSIDE PLAN OF BOX
    1. ROAD-RUNNER LIFTS GLASS OF WATER- PULLING UP MATCH
    2. MATCH SCRATCHES ON MATCH-BOX
    3. MATCH LIGHTS FUSE TO TNT
    4. BOOM!
    5. HA-HA!!

    -WILE E. COYOTE, AUTHOR OF "EVERYTHING I NEEDED TO KNOW IN LIFE, I LEARNED FROM GOLDBERG & MURPHY"

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  6. #26
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    I'll take that advice for action

    Quote Originally Posted by MistWolf View Post
    BEFORE CHANGING ANYTHING ON THE RIFLE- before changing the barrel, the upper or the trigger- CHANGE THE AMMO!

    The M855 ammo isn't made for accuracy but to be produced in mass quantities. 8 inches at 300 yards is less than 3 MOA and is a little better than average.

    I have a 20" rifle with a Lothar-Walther barrel that shoots 7 inch groups at the same range with the same ammo. But it will shoot well under 1 MOA with the right load.

    A shooter cannot know what the true potential of a rifle is until it's tested with good quality ammo. Replacing the barrel or upper or trigger is a waste of money if you are not going to shoot good ammo.

    Before replacing the trigger, remove it from the lower and clean it up. Then, lube the sears, pins and the bottom curve of the hammer with grease and re-assemble. This will go a long way to smoothing out an AR trigger and making it predictable
    I'll do a thorough cleaning of the lower and inspect it closely for any burrs or deformities, then lube it before I take it to the range again. I'm out, working on my tug for the next three weeks. So don't expect a progress report real soon.

    Thanks for the advice, though. It helps.

  7. #27
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    I would just buy a 20" DI upper(I did exactly this) and be done with it. $400 to $600 hopefully when the panic subsides (maybe less, lots of morons paying too much right now) slap it on your lower and your gold. The trigger is sucky at best, if you can get use it then great, but replacing it couldn't hurt. You don't have to buy a new gun, with lowers being so hard to get keep yours. Don't get rid of it. The AR has been called the big boy's erector set for a reason. This is the cheapest and easiest route to take and it will work. Selling your rifle and wishing or praying you can find another could be a bad idea. No ban, well no big deal. Ban, well your screwed.
    Last edited by mastiffhound; 01-23-13 at 23:16.
    Appeasement is never the answer in the face of naked aggression.

  8. #28
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    A new upper is my latest rasoning.

    Quote Originally Posted by mastiffhound View Post
    I would just buy a 20" DI upper(I did exactly this) and be done with it. $400 to $600 hopefully when the panic subsides (maybe less, lots of morons paying too much right now) slap it on your lower and your gold. The trigger is sucky at best, if you can get use it then great, but replacing it couldn't hurt. You don't have to buy a new gun, with lowers being so hard to get keep yours. Don't get rid of it. The AR has been called the big boy's erector set for a reason. This is the cheapest and easiest route to take and it will work. Selling your rifle and wishing or praying you can find another could be a bad idea. No ban, well no big deal. Ban, well your screwed.
    I may even go for a larger bore, after all the advice I've been getting and reading I've been doing on the subject.

    I'll be cleaning up the lower, looking for poor craftsmanship and such, then lubing it up good before seriously considering replacing the trigger group.

    Thanks for the advice.

    By the way, I've heard that there was a loss in the Koran's translation. The correct reading was retribution by 40 Virginians, with George Washington leading the charge.

  9. #29
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    I've found that, with decent ammo, the Ruger SR556 will shoot about as good as anything.

    As others have already suggested, try different ammo before tying up a bunch of money with a new barrel, etc.

    If you do ultimately decide that you want some custom work done, I'd suggest Marvin Pitts. He's familiar with the Ruger piston system and can turn you just about anything you might want for a barrel.


    Both of these targets were shot with a stock SR556 topped with a Burris XTR14 scope.

    Four rounds at 300 yards.


    Ten rounds at 100 yards.

  10. #30
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    Nice group, Mr. Tokarev!

    It gives me hope.

    I've made some progress since my last post. I've added a military surplus bipod and been shooting some hornady and black hills ammo. Better results, of course.

    As for upgrading the barrel and other items on the upper, I've decided to buy a larger bore upper. Probably a 300 AAC Blackout with polygonal rifling. I'm to tight on cash right now, but still looking around to see what's what and such.

    Thanks for the advice, though. I do appreciate it.

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