![]() Elevation and windage adjustments are accomplished using a small, standard screwdriver in the slots on the top and back. The optic uses a 3 MOA red-dot, which has three manual brightness settings and one automatic brightness sensor, which is what I used. It’s carried by many Alaskans for bear encounters. The load uses the Lehigh Defense bullet and penetrates like an anti-aircraft shell. Underwood’s 140-grain Xtreme Penetrator load ranked very high as tested in the Glock 40 MOS. I tried to break it by shooting hundreds of rounds of the hottest loads I could get my hands on. How Burris engineered it to not only keep from flying into the wild blue yonder under the heavy recoil of powerful 10mm loads is beyond me, but what really impresses is how well it holds zero shot after shot after shot. The little Burris Fastfire 3 reflex-style red-dot sight looks tiny sitting on top of the G40's massive slide, but don't judge a book by its cover. Considering the Glock’s stellar out-of-the-box accuracy and reliability, it is now fully capable of unleashing hellfire on targets from point blank to 50 yards with alarming precision. A little elbow grease transformed the Glock trigger into a 3.4-lb. connector and spring kit, doing some judicious hand polishing of key mating parts and finishing up with a deburring job that would have made the old machine shop teachers proud. Thankfully, I was able to improve the trigger dramatically by installing a 3.5-lb.
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