Latest activity
Love that Vudoo
- By Shootin25
- All Things Rimfire
- 1 Replies
Rifle did its job, because you did yours. 
Maggie’s Motivational Pic Thread v2.0 - - New Rules - See Post #1
- By Modoc
- The Bear Pit
- 305331 Replies
Where were the ladies who looked like this when I was in my 20’s?
Not complaining about the one who caught me, but I don’t remember my contemporaries looking that good back then.
DeLane Development Group Rimfire Ventures
- By RAVAGE88
- All Things Rimfire
- 11827 Replies
Ok, after yesterday's post showing the DDG M5x DBM System, I've received tons of questions about my Pre-Load Piston (PLP). So, I figured I'd give a y'all a better look at what it is, what it does, and how one makes it a part of his/her shooting platform.
As one can see, when the magazine is inserted, it forces the PLP upward by acting on a surface on the tab of the PLP. The PLP is under pressure from an internal spring and this pressure acts upon the top surface of the magazine.
This pressure forces the magazine downward, trapping it between the tab on the PLP and the magazine release. At this point, the magazine is not free to bounce up and down and it has resistance to moving about the lateral axis (the magazine can't tilt forward and down).
So, how does one make the M5x fit his/her stock? As one can see from the attached photo of the inletting in a McMillan stock, I've colored the area in red that needs to be removed. Thanks to four cups of coffee, I colored the area a little larger than it actually needs to be, but one can easily get an idea of how simple it is to fit the M5x in his/her stock.
The DDG M5 DBM drops right in without any revisions.
Because the PLP needs a bit of headroom to move upward when the magazine is inserted, a small revision is made to the receiver by pushing the forward wall of the trigger pocket forward. I've attached a 3D assembly below that I posted recently, and one can see the small area in question. I don't recommend this revision be performed with a hand mill (Dremel), but instead, a manual mill like a Bridgeport or in a CNC. It's actually quite a simple operation.
There's one additional feature that's part of the full-on system (Magazine, M5 and M5x DBMs, New Rimfire Bolt Action) that I'm not showing yet that will make all this make more sense when one sees it. But the goals are to continue with envisioning and creating the exceptional to continue to push the boundaries of increasing accuracy and overall performance of the Rimfire Shooting System.
Hope this helps and feel free to keep the questions coming.
MB
As one can see, when the magazine is inserted, it forces the PLP upward by acting on a surface on the tab of the PLP. The PLP is under pressure from an internal spring and this pressure acts upon the top surface of the magazine.
This pressure forces the magazine downward, trapping it between the tab on the PLP and the magazine release. At this point, the magazine is not free to bounce up and down and it has resistance to moving about the lateral axis (the magazine can't tilt forward and down).
So, how does one make the M5x fit his/her stock? As one can see from the attached photo of the inletting in a McMillan stock, I've colored the area in red that needs to be removed. Thanks to four cups of coffee, I colored the area a little larger than it actually needs to be, but one can easily get an idea of how simple it is to fit the M5x in his/her stock.
The DDG M5 DBM drops right in without any revisions.
Because the PLP needs a bit of headroom to move upward when the magazine is inserted, a small revision is made to the receiver by pushing the forward wall of the trigger pocket forward. I've attached a 3D assembly below that I posted recently, and one can see the small area in question. I don't recommend this revision be performed with a hand mill (Dremel), but instead, a manual mill like a Bridgeport or in a CNC. It's actually quite a simple operation.
There's one additional feature that's part of the full-on system (Magazine, M5 and M5x DBMs, New Rimfire Bolt Action) that I'm not showing yet that will make all this make more sense when one sees it. But the goals are to continue with envisioning and creating the exceptional to continue to push the boundaries of increasing accuracy and overall performance of the Rimfire Shooting System.
Hope this helps and feel free to keep the questions coming.
MB
