This is a simple 10 round locking plate conversion that was designed specifically for the H&K USP 45, though, other USP variants may be compatible. Installing this locking plate on the USP 45 will allow your 10 round magazine to hold two additional rounds without requiring the user to modify the factory base plate. I cannot confirm the capacity of other USP variants.
The idea came about via a friend who had modified his factory base plate on a USP 40 with make shift shims cut from beer cans. The current iteration of this locking plate does not utilize a plug. If anything, the plug is purely aesthetic as it does not affect cycling or function of the magazine. Feel free to remix this design to add your own plug or follow for when I eventually add a plug later on down the line.
If you're printing this, I assume you are already a knowledgeable, capable printer. Use your best judgment when printing.
However, I will personally recommend that you use:
When installing the locking plate, make sure that it is properly seated. On a magazine with a properly seated locking plate, the ears of the magazine base plate should not depress at all when at capacity. On an empty mag, the ears should not give more than 1/4". Use a pin punch, allen key, screwdriver, etc to work the plate back and forth / side to side until you hear it click into place and verify that the ears of the base plate can no longer be depressed unless the locking plate is pressed down and out of the way.
Disclaimer: I am not liable for your actions. Follow all laws, and regulations regarding magazine capacity for your area- State, and Federal.
| usp_10r_lp_conv.stl | 46.4KB |
