Just got my order from DSG this afternoon, and got them installed. Here's my initial impressions.
The Rise RA-140 SST triggers are a HUGE upgrade over the CMMG milspec trigger that was in my Spikes lower. That thing was heavy with tons of creep, and had a very spongy break. It needs some serious polishing and some lighter springs if it ever gets used again. For now it's in a labeled ziplock bag and tossed into the random parts bin as a spare.
As for the LWRC rifle, the Rise trigger is not quite AS big an upgrade over the stock LWRC trigger (compared to the CMMG), but the differences are still VERY noticeable. The reason being, the factory LWRC trigger is a very nice polished-up 5.5 lb. milspec trigger with a fairly short reset (for a milspec). But it is still a milspec, therefore it still has some creep, the break isn't as clean, and the pull is a bit heavy at around 5.5 lbs. when compared to the Rise trigger, which has 3.5 lbs. of pull, with virtually no creep, a fairly crisp break, and a very short reset.
Final conclusions and personal opinions...
Even at a retail of $122...The 3.5 lb. single-stage Rise RA-140 SST triggers are a very good upgrade over a stock milspec trigger in an AR. When shooting, it is very apparent you are not pulling a milspec trigger. And in comparison with other aftermarket triggers I've shot before, they feel just as nice, even as nice as some others that cost a lot more. When I buy some more lowers, they will be getting Rise triggers, as well.
Here's a few updated pics I took today, after installing my new Rise triggers and KNS pins...