Use these blocks to hold the lower so you can do maintenance and to test your trigger work. You can dry fire the lower without fear of damaging the receiver because the hammer will hit the plastic block not the thin aluminum.
(I put silver paint on the edge of the hammer for you to see it better, that is not a gap.)
You can also mount an upper (with no BCG) on the lower with the block installed.
The lower half of the block is trimmed down so repeated clamping should not interfere with it being removed from the magwell.
Email me and post here please if you want one!
These are only $25 shipped ppal fees included.
ppal to vonzep58(AT)yahoo.com
CROSS POSTED, TIME STAMP OR PM TIME RULES I will try to keep some in stock