H&K MP5 SEF full auto lower complete with 9mm Ejector

MP5 SEF full auto lower complete with 9mm Ejector. H&K Navy SEF lower with complete SEF trigger pack and selector installed.



Perfect for registered receivers, post samples or anybody wanting to do their own semi-auto conversion!



All German parts except US made 9mm ejector lever.



All NFA rules apply. It is legal to own this lower but it is not legal to modify this lower to make a machine gun unless you are a licened manufacturer FFL type 7 with a S.O.T class 2.

Enter your ZIP code for an exact shipping cost on this item. Hazardous-materials fees, where they apply, are included in the total shown.

Read our full shipping policy

Firearms must ship to a licensed dealer (FFL), who completes the transfer and the required background check when you collect the item.

How FFL transfers work · Terms of sale · Product and legal restrictions