The SHTF50 is Safety Harbor Firearms’ .50BMG Upper Conversion for the AR-15/M16
Specifications
Receiver:Machined from 4130 Chromemoly Steel
Magazine:5 Round, Single Stack Magazine.
Muzzle Brake:8 port steel. Threaded to muzzle.
Bolt Head:2 lug, machined from 4340 Chromemoly Steel
Barrel:4140 Chromemoly - 18, 22, and 29 inches long
1-15 Twist (Barrel Fluting Optional)
Scope Mount:Aluminum with Picatinney rail profile mounted on the receiver.
Bolt Body:Machined from 4130 Chromemoly tubing.
http://www.safetyharborfirearms.com/Pro ... ducts.html
