These 21's are made from like-new German & FMP demilled MG's. To comply with B.A.T.F. 922r and the '94 crime bill we have used a U.S. made hammer and sear. Also, the flash hider has been sleeved and soldered to comply with the crime bill yet retain the original look. The receivers are factory FMP in the "white". They have never had a trunnion in them so no tear down of a barreled receiver had to be done. The "feed box" we use is factory made, and the rails are quality machined HK21"E" style. All weapons are test fired and guaranteed to function. If installing a registered auto-sear, no crime bill modifications are necessary, and there is no additional charge for installation. Weapons will feed non-disintegrating DM-1 style belts or M-13 (M-60 style) links. Prices starting at $XXXX (price available upon request) for original style (Parkerized finish, metal SEF, and original buttstock). Starting at $XXXX (price available upon request) you can get an HK21"E" cocking handle, buttstock, and recoil rod, a plastic SEF lower, and HK black finish. This finish is applied by Lauer Custom Weaponry using DuraCoat--the best finish on the planet!