Plum Crazy Ar Lowers

[Bam Bam]

I don't think my lower gets all that hot. I wouldn't do a plastic upper though...

Well my Kel-Tec SU-16C IS a polymer upper and only weighed 4lbs 10oz when new and no optics or mags, but in it's current configuration it's more like 6 3/4lbs. I've have added a pistol grip/AR stock set up to it and a Red Lion Precision free floated forend on it now which added some weight, but it's still lighter than most AR's. I've had my barrel smoking from excessive "mag dumps before with no ill effects! Todays modern polymers are pretty dang good IMHO. I'm curious about these lowers like everyone else, keep up the good work kajuntrition!

Bam Bam

 

[geauxshootin]

I got a few of them from Todd. Plan to make a cheaper rifle, or pistol that I can carry in the truck. Definately will not have a problem with too much rust on the lower!!

 

[tactical723]

Bushmaster has been using polymer upper and lowers for years on one of the AR models in .223. http://www.bushmaster.com/catalog_carbon15_AZ-C15M4PRE.asp

Dont really know anyone who wons one, but it always been in their online catalog and in stock item. Hell they use it on an upper as well, and like Bam Bam stated the Keltec uses polymer upper and lowers. I know Bam Bam has thousands through this Keltec

 

[CloudStrife]

It's the upper that takes the force of the cycling bolt and may get hot, not the lower correct? Therefore, I don't see how a polymer AR lower would fail except maybe for butt stroking since the buffer tube is anchored in the lower.

 

[scooterj]

It's the upper that takes the force of the cycling bolt and may get hot, not the lower correct? Therefore, I don't see how a polymer AR lower would fail except maybe for butt stroking since the buffer tube is anchored in the lower.

A friend had a Hesse polymer lower. It wouldn't cycle more than two rounds without hanging up. Buffer tube alignment issues.

 

[Guate_shooter]

It's the upper that takes the force of the cycling bolt and may get hot, not the lower correct? Therefore, I don't see how a polymer AR lower would fail except maybe for butt stroking since the buffer tube is anchored in the lower.

I believe what most people were concern about is the fact that all the trigger components are also polymer, not the fact that the frame is.

 

[CloudStrife]

I believe what most people were concern about is the fact that all the trigger components are also polymer, not the fact that the frame is.

Oh. PC sells complete lowers, stripped lowers, and trigger groups. The polymer hammer could be switched out.

 

[kajuntriton]

Oh. PC sells complete lowers, stripped lowers, and trigger groups. The polymer hammer could be switched out.

Just courious, why would you want to switch it usless you either had a problem or if you saw a trend with a high failure rate of the hammers?
Personally I think it is too soon to tell. I have done research here as well as other sites and I don't think I have found but maybe 2 guys that has ran more than three-hundered rounds using this lower.....VERDICT IS STILL OUT in my opinion!

Pete below is far beyond in the round count than anyone I have found this far! I hope to add to his testing as well!

Personally if I can get 2 to 3K rounds without majory failure or issues I will purchase a third, mount a new upper....... and slide it away for a very nice SHTF

weapon! Never worrying about RUST!!!!

I got two from rockmup they are as advertised. 4-5 hd rounds through each. No problems. 2k may be a different story....not there yet. Plastic takedown pins are a bit dinky. They were not intended to be investment builds for me.

 

[CloudStrife]

Just courious, why would you want to switch it usless you either had a problem or if you saw a trend with a high failure rate of the hammers?
Personally I think it is too soon to tell. I have done research here as well as other sites and I don't think I have found but maybe 2 guys that has ran more than three-hundered rounds using this lower.....VERDICT IS STILL OUT in my opinion!

Pete below is far beyond in the round count than anyone I have found this far! I hope to add to his testing as well!

Personally if I can get 2 to 3K rounds without majory failure or issues I will purchase a third, mount a new upper....... and slide it away for a very nice SHTF

weapon! Never worrying about RUST!!!!

I was just saying that any trigger group could be used with the polymer lower if people were so concerned about the polymer parts.

 

[kajuntriton]

I was just saying that any trigger group could be used with the polymer lower if people were so concerned about the polymer parts.

OK I thought you were suggesting that YOU would change it! I am still stunned that so many people INCLUDING DIE HARD GLOCK FANS, XD and the rest of the tuperware toten crowd are being so critical of this lower!
ESPECIALLY since 99.5% of them (NO I DO NOT HAVE HARD FACTS of this PERCENTAGE) have not even seen one of these lowers much less shot or EVEN HANDLED ONE!



KT

 

[petelanca]

Any recent feedback on these?

 

[kajuntriton]

170 rounds thru her this weekend, NO issues I picked up some tracer rounds and I will try them out just for giggles and grins, reloaded some more mags tonight and stacked the tracers ever 4th round, should look cool if noting else. Maybe tomorrow evening I will burn a mag or two.

So this is still a very low count but it's an on going process so this makes 190 to date.....

 

[do2gomike]

Well I have one and have put 960 rds through it already really want to see how well it's gonna hold up and how long heck they do carry a lifetime warranty. I have a cmmg 14 1/2 with permanent attched flash hider upper so far no hick ups or problems. Rockmup you're right bro these lowers rock

 

[MikeSlater]

Good to hear! I have one waiting on a upper in the safe. Cant wait to get it put together.

 

[rockmup]

Well I have one and have put 960 rds through it already really want to see how well it's gonna hold up and how long heck they do carry a lifetime warranty. I have a cmmg 14 1/2 with permanent attched flash hider upper so far no hick ups or problems. Rockmup you're right bro these lowers rock

Glad to see someone is shooting theirs besides me.

 

[do2gomike]

Yea I can't wait to pick up 2 more from you Todd,and I also have to talk to you about my suppressor

 

[MikeSlater]

ok gonna go with the jsesurplus custom upper minus the bcg and order a cmmg conversion. Slap it on my Plumcrazy lower and see what happens! 15/22 on the chopping block!~

 

[Swami]

The ultimate budget AR: Plum crazy lower, JSE upper, BSA RGB dot and nifty lazer beam (gosh!) - plus 7 mags, a case, and 400 rounds of ammo, and still under the cost of many uppers - about 700 bucks total invested!

Shot it very briefly, ran 2 mags through with no problems at all. I hope to head to Nick's next weekend and get it all set up nicely.

 

[gbundersea]

Swami - nice setup! I have the same, except with a Pentax red dot sight that a good friend (LAcamper) gave me.

Is that the standard handguard that came with the upper? And if so, how'd you add that rail underneath? I wouldn't mind having a small rail like that on which my TLR-1 could mount.

 

[Swami]

Got that rail from the counter at Bayou Dragon... but you can get them online, they're about 10-12 bucks. A search on "AR handguard rail" should bring a number of places to order 'em. I think you need a rail there!