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I'm looking at a new Rise Armament RA-140 SUPER SPORTING TRIGGER. Only a 3.5 lb trigger. Anyone's thought on these?
What is difference between single stage and double stage triggers?
Also I've looked for this gun online and different sites say the barrel is a 223 Wylde? Does not show this on the gun. The lower says 223 and tip of barrel says 556.
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Single stage trigger is like a 1911 - little/no take up, just apply pressure and it breaks.
Two stage trigger is like a Glock - noticeable pre-travel, you hit a wall, add a touch more pressure and it breaks.
One style isn't better than the other - just preference. You probably don't want a very light trigger if this is a multi-purpose rifle.
Disregard caliber on the lower - you could slap a .50 Beowulf upper on that lower and it won't fire .223. If the barrel is stamped 556, I'd go with that. If it really is a Wylde chamber, then it can still handle 556 loads.
Put some grease on the engagement surfaces of your trigger and hammer. It can help improve the feel. White lithium, synthetic, wheel bearing, moly... whatever you have in the garage will be fine.