80% lowers on rockethub

[xacex]

Is/are polymer lowers significantly easier to drill and mill?
Any idea how they hold up after milling?

Thanks.

Yes, I have not done one, but I do own a New frontier polymer, and can tell you from just the material composition that it would be easier to mill/drill. The New Frontier poly lowers are strong, and I have no doubt they will hold up. I have used that lower for the 50 Beo a few times, and I like the weight. I do not know if these 80% are the same material as the NF ones. It is some kind of stranded polymer more like a cross of carbon fiber and a hard plastic so it has plasticity, and slight flexibility. I imaging if it were crushed it would crackle like fiberglass.

[OBIII]

My drill press is on the fritz, so I haven't tried to drill one yet. With a jig and bits, it's supposed to be a no brainer. To my knowledge, polymer lowers are just as strong as aluminum or steel. They do recommend that you do not "dry fire" your lower once you install the lower parts kit, unless you have the stop cushioned. Would not be an issue with an upper on it. Obviously, though, it's plastic, so keep away from strong solvents, hammers, and tank treads.

OB

[Down South]

Looks like a good deal to me.