Has anyone tried one of these polymer lowers?

[Sesameball]

These are actually composite materials, e.g. carbon fiber or refractory in a polymer matrix. This gives a material that is both hard and tough. I got to handle one of these at the second-to-last BR gun show, and they are very tough, very light...and not ridiculously expensive. I think they fill the Cav-Arms niche nicely, and would be a great choice for a light-tactical rig--e.g. with a carbon forward, pencil bbl, etc. The rifle I checked out was *very* light, and pointed well.

Ses.

 

[gmshooter]

I was getting these under 6 lbs with a dpms oracle pencil upper and magazine.

 

[5.45 Shooter]

A regular lower is only 8-9oz how does a plastic one make it a pound less?

The only part that is steel in the Plum Crazy lower is the bolt catch, the rest of it is composite material that is how it is a full pound less.

I bought one of these lowers just to test and see how fast it falls apart.
But to my surprise it looks to be a solid lower not bad at all it has about a 6# trigger pull & very light weight.

I have over 1000rds through this gun in the last 3 months and have tested it in just about every way I could think of & short of abusing it the only problem I could find was, when I over oiled it the trigger got gritty after a few hundred rounds fired. It was fixed by blasting it out with Gun Blaster & blow dry with compressed air. This lower works best dry, don't oil or lube it in any way.
I wouldn't trust it to be a self defense weapon, it is a solid lower as far as a plinking, hobby type shooting goes.

 

[jetmech1983]

The only part that is steel in the Plum Crazy lower is the bolt catch, the rest of it is composite material that is how it is a full pound less.

I bought one of these lowers just to test and see how fast it falls apart.
But to my surprise it looks to be a solid lower not bad at all it has about a 6# trigger pull & very light weight.

I have over 1000rds through this gun in the last 3 months and have tested it in just about every way I could think of & short of abusing it the only problem I could find was, when I over oiled it the trigger got gritty after a few hundred rounds fired. It was fixed by blasting it out with Gun Blaster & blow dry with compressed air. This lower works best dry, don't oil or lube it in any way.
I wouldn't trust it to be a self defense weapon, it is a solid lower as far as a plinking, hobby type shooting goes.

I wonder if these same words were once said about the Glock?

 

[Louisianaspeed1]

I have a friend of mine that had an polymer ar lower and upper chambered in 22. Cal it exploded on him and the manufacturer ignored him. I don't know the name but it happend. I'm an ak guy so

 

[03protege]

The only part that is steel in the Plum Crazy lower is the bolt catch, the rest of it is composite material that is how it is a full pound less.

I guess I'm still confused.

How can something be 1lb lighter than 8oz (half a lb).

.5lb - 1lb = -.5lb

 

[03protege]

not sure what lower you're talking about but i just weighed my RRA complete lower and it is 2lb 7oz

I believe I was talking about the lower, Do the PlumCrazies come assembled?

 

[03protege]

Yes they do and most of the LPK is polymer as well to shave more weight off

Gotcha, thanks for the clarification.