Work on the Lower began in earnest.
The Hera CQR was split so that I could document the internal structure. Germans really don't do polymers as well as they do metals, but the design philosophy and engineering was okay.
I measured the mil spec detent springs I ordered for a hollow set screw, so that it did not trap grit and oils in the receiver. I tapped the hole, clipped the spring a bit shorter, and inserted the 14-40 screw.
Next was to deal with the atrocious control fitment on most AR based rifles. The gap between the selector and the receiver was far too large for my taste. I whipped up a couple 3/8 x .062" bronze spring washers to go behind the selectors. That was a massive improvement in feel.
I also ordered stainless pan head screws with stainless tooth washers because I wanted to spread the engagement over a larger surface area inside of the polymer stock.
The M5 lowers are already threaded internally for a large nylon tipped set screw to adjust takedown pin pretension, which is a big plus!
The Hera CQR was split so that I could document the internal structure. Germans really don't do polymers as well as they do metals, but the design philosophy and engineering was okay.
I measured the mil spec detent springs I ordered for a hollow set screw, so that it did not trap grit and oils in the receiver. I tapped the hole, clipped the spring a bit shorter, and inserted the 14-40 screw.
Next was to deal with the atrocious control fitment on most AR based rifles. The gap between the selector and the receiver was far too large for my taste. I whipped up a couple 3/8 x .062" bronze spring washers to go behind the selectors. That was a massive improvement in feel.
I also ordered stainless pan head screws with stainless tooth washers because I wanted to spread the engagement over a larger surface area inside of the polymer stock.
The M5 lowers are already threaded internally for a large nylon tipped set screw to adjust takedown pin pretension, which is a big plus!
Attachments
-
IMG_0695.jpeg249.8 KB · Views: 38
-
IMG_0969.jpeg211.3 KB · Views: 42
-
IMG_0966.jpeg125.9 KB · Views: 36
-
IMG_0964.jpeg94.1 KB · Views: 32
-
IMG_0965.jpeg218.2 KB · Views: 34
-
IMG_0758.jpeg123.6 KB · Views: 34
-
IMG_0759.jpeg162.5 KB · Views: 32
-
IMG_0762.jpeg223.1 KB · Views: 34
-
IMG_0761.jpeg198.1 KB · Views: 35
-
IMG_0760.jpeg120.4 KB · Views: 33
-
IMG_0757.jpeg92 KB · Views: 32