Poly AR lower

[La Dano]

Just picked up a new poly AR lower, any feelings about them? My 1st AR build also.

Thanx

[MtGun44]

What brand. Plum Crazy has some detractors. I have used a few different
ones that functioned perfectly.

Bill

[nhrifle]

As long as all the parts fit where they are supposed to and function safely, the lower receiver is just a carrier for the fire control group. It does not endure any stress during firing, as al that is contained within the barrel/bolt and transferred straight back through the buffer tube to the buttstock. If it is good quality, you won't have any problem.

[xacex]

I have a few of the New Frontier lowers, and have had them side by side with the ATI lowers. I like the composite that they make the New Frontiers out of. Seems like it should hold up better to abuse than what the ATI's can handle. They have a vid of the guys shooting 458 socom with a New Frontier, and tossing the rifle back and forth into the dirt. I have a 300 blackout pistol built on one, and have no complaints. Guaranteed for life, and it is transferable. What more could you want? My forged lowers don't come with that guarantee.

[highbrow]

I picked up an ATI poly lower about 6 month ago. 600rounds through it so far with no problems, but I did not throw it down the driveway.

[La Dano]

I was told I wouldn't be disappointed, I'm not gonna throw it down the driveway either, hehe. I think my wife is gonna try and take it from me. She's been wanting one for a couple years now.

[HATCH]

The only thing i read about polymer lowers is some are rated only for 223/22lr

[Moonie]

I have a plum crazy lower, works just fine on both my 6.8 SPC upper and my 300AAC upper.

[xacex]

The only thing i read about polymer lowers is some are rated only for 223/22lr

That would be the case with the ATI's.

[La Dano]

I got the FMK's.
I guess it's gonna be a while before I can get the rest of my parts.

[Artful]

I've used cavalry arms for years no problems.

Now made by
http://www.gwacsarmory.com/cav-15-mkii.html
Not indestructible
http://www.arizonashooting.com/v3/vi...p?f=3&t=133214

but neither is the Aluminum version

[MtGun44]

Not the lower I would choose for bayonet fighting, but I hardly ever do any of that.



Bill

[La Dano]

Hope I don't run out of boolits to use a bayonet. Hehehe
I would like to try some cast in it one day. Any suggestions?

[Boz330]

Hope I don't run out of boolits to use a bayonet. Hehehe
I would like to try some cast in it one day. Any suggestions?

Reminds me of a DI telling us in bayonet training one day that occasionally a bayonet will get stuck and you may have to shoot it loose. I thought, to myself, that if I have bullets left I'm not going to be sticking anybody with a dull knife.

Bob

[La Dano]

I definitely see you point Bob. Hehe

[Screwbolts]

I have a Plum Crazy Lower that has had more than 6000 rounds fired from 3 different 5.56 uppers. It functions perfectly and is still as tight as new. I also have had the same GREAT experience with the New Frontiers. over 2500 rounds from one of them.

I currently have a New Frontier equipped with a Exile Machine, Hammerhead grip and Ace entry length butt stock. this combination has seen 400+ rounds in the last 2 weeks. I am liking it very much. This configuration is actually easier for my wife to shoot.

[La Dano]

SB, you make me jealous. I'll be glad when I finally come up with a upper.

[fishnbob]

I just started putting a LPK in a New Frontier. The first step was a pisser! The simple Mag Catch/Release. I had to recut both the Magazine Catch side and the Magazine Catch Button side to enable the catch to thread and the magazine catch wouldn't seat deep enough to lock the mag.
Neither part would go in the recess at all. Thank God for a Dremel tool, now If my eyes were good enough to see what I'm doing, I might make it. If I run into any more of that I'm going to see about sending it back. I expected a little burr removal but it looks like the hole is drilled off. It works, but it ain't slick like my other AR. Anybody else having trouble with the cutouts?

[La Dano]

Well a little update on my end. I finally got a LPK in 1 of my poly lowers, trigger pins were a little loose and I had to drive the rear pin in my upper. The upper came off my wife's Wyndam Weaponary. Now that AR shoots 1 hole groups with my loads at 75yds, very nice trigger as well. So I swapped the upper to my poly lower and ran 200rds through it. Hardly a pie plate group now. So Thur I was telling my buddy about the groups, he said to bring it back and he would check it out. Come to find out the 2 poly lowers were just a little off, he offered to swap them out for Red Jacket 6061 lowers so I jumped on them. I'm putting the Wyndam back just the way it was, it shoots awesome with 3 different loads I have. Still want to try some cast with it.

[Tom-ADC]

I bought the New Frontier poly lower and will start assembly this week, I did test fit a couple of parts and find it to be very tight.
With luck I should be able to test fire it next week.
This is my first AR build hope it goes good.