Compatible with the following:
Each magazine will count as 3 US made complaint parts. This is all that you need for US compliance on a USC to UMP conversion.
Note: The UMP Magazine will not fit a stock HK USC unless the USC-UMP
firearm has been gunsmithed to accept the double stack UMP magazine. The base of this magazine is sealed shut with industrial grade polymer adhesive and it can not be taken apart without destroying the magazine. This magazine is manufactured and distributed by LWRC.
SPECIAL ORDER ITEM - PLEASE ALLOW APPX ONE WEEK FOR THIS ITEM TO SHIP