These upper receivers are machined from 7075 billet aluminum and shot peened for increased hardness, strength, durability, corrosion resistance and extended service life.
Each receiver comes with one piston rod guide bushing, one piston rod guide bushing pin and one rear lug leaf spring.
Material: 7075 aluminum
Process: Machined from billet
Finish: Mil-A-8625 Type III Hard anodize Class 2 Dyed
Compatible with Genuine Heckler & Koch lowers and nearly all standard mil spec lowers, LMT MARS lowers will most likely require some modification to either the lower or the upper.
Click this link for information on mating the A5 upper with Mars lowers: https://www.hkpro.com/threads/416-a5-upper-on-mr556-or-lmt-mars-l-lower.564453/#post-4086532
🇺🇸 Made In USA
We recommend that you spray your receiver with a generous coat of oil or silicon inside and out before use to lubricate the inside and remove any residue from the anodizing process, wipe any excess from the outside with a clean, dry cloth.
Interested in this product but have a few questions before you hit the buy button? Call 512-650-9673 and we’ll do our best to address your concerns.