Receiver Materials:
Upper – Billet 6061-T6 Aluminum
Lower – Forged 7075-T6 Aluminum
Buffer Tube Material – 7075 Alum. (During high demand we do supplement with 6061 Alum.)
Buffer Weight(s):
A1 – 5.2oz
Carbine – 2.952oz
H – 3.784oz
H2 – 4.6oz
H3 – 5.4oz
Bolt Carrier Group Materials:
Bolt – Steel, 9310
Carrier – Steel, 8620
Extractor – Steel, 4140 or 4340
Ejector – Steel, S-7
Currently available in the following calibers:
22LR
5.56x45mm (.223)
300 BLK
350 Legend
4.6x30mm
5.7x28mm
6.5 Grendel
6mm ARC
9mm
Virtual Patent Information can be found here.