Cut the receiver stock interface down to a little less than 1/2" and then attach the new AR180B receiver block and any ACE modular stock.

Also note, the original stock can still be reinstalled on the receiver and feel "solid", (of course, the stock would be somewhat less than full strength).

ACE AR180B receiver block. Includes 1 1/4" ambidextrous sling mount.

AR180BB :..........$35.00

AKFX Skeleton folding stock kit super short shown. Length of pull  13.5". Complete stock kit as shown.

AR180BB-FX(SS)-FS .........$159.90
L.O.P. is 13.5"                      
AR180BB-FX(S)-FS ........$159.90
L.O.P. is 14.5"                     
AR180FS-FX(L)-FS ........$159.90
L.O.P. is 15.5"                     

M4 six position telescoping stock kit as shown. Length of pull 12.25 to 15.75 in six - 5/8" increments.

AR180BB-M4(M).........$99.95

M4 Six Position Side Folding Telescoping Stock Kit as shown. Length of pull 13 to 16.4 in six - 5/8" increments.

AR180B-M4(M)-FS.........$159.90

Side Folding Boom Tube stock kit as shown. Length of pull 13.5".

AR180BB-UL-M-FS.........$159.90