Not about the scope, but this thread is also about the crossbow, Mission Sub-one lite. My partner liked my Sub-one so much, a year or so later he told me he bought one for himself.
If you remember from my original post, I said the "arrow skipped off the window seal", or something to that effect. Now I don't know if that was a function of the cracking limb or if I simply did not account for the window seal. Unlike a firearm, the scope on a crossbow is well above the projectile. Unlike most crossbows, the Sub-one light is designed so you put your foot on the riser to cock it, not in a stirrup. This means the riser is further forward than most crossbows because there is no stirrup. If I put the riser outside the window, it attracts a lot of attention. So last winter, I decided to deal with this issue.
My crossbow has a picatinny rail on the bottom and a spot where a monopod can attach. I like the monopod in a treestand, but not in a blind. I ended up fabricating a short grip that attaches like the monopod. If I fold it forward and set it on the window seal (a 2x4), I'm pretty certain the arrow can't hit the seal. I used it this season so far. It works, but it could be better.
Back to my partner...A couple weeks ago, he took a spill and broke the plastic butt portion of he stock. I don't use the butt portion of the stock. Instead, when I first got it, I removed the butt plate and extended the stock straight back and covered it with foam. I rest it on top of my shoulder rather than pulling it into the front of my shoulder like a firearm. Since there is no recoil with a crossbow you don't need the bracing behind the butt that your shoulder provides like you do with a firearm. I find gravity helps as the weight of my right arm holding the pistol grip stabilizes the rear better than using the butt. So, I gave him my butt stock.
I was shocked when he brought out his crossbow to install it. It had a stirrup! I had no idea they made them for the Sub-One since they did not make them when I bought mine. Evidently the design of stepping on the riser helps shorter folks cock the crossbow easier. I'm plenty tall. I got to thinking after that, that a stirrup would completely solve my window seal issue. So, I ordered one from Mission. It is supposed to arrive on Wednesday.
I'll probably have to redesign the carrier on my ebike given that my current configuration has the riser right up against my butt, but I'm sure I can work that out. I hope to get it installed on Wednesday and hunt Thursday evening with it. Here is a picture of how it attached to the bow:
Mine has rubber bumpers on each side where the stirrup attaches.