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![]()


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