Frame is aluminum
NSN 6240-01-621-2774
NSN 6645-01-616-8996
NSN 5998-00-278-4481
NSN 6645-00-551-8291
NSN 6650-01-426-4253
NSN 5965-01-352-0961
NSN 5975-01-651-9045
NSN 6220-00-125-9614
NSN 5905-01-082-2023
NSN 6110-01-510-0364
NSN 5945-01-095-7660
NSN 7035-01-421-4446