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polymer
A polymer (; Greek poly-, "many" + -mer, "part") is a large molecule, or macromolecule, composed of many repeated subunits. Due to their broad range of properties, both synthetic and natural polymers play essential and ubiquitous roles in everyday life. Polymers range from familiar synthetic plastics such as polystyrene to natural biopolymers such as DNA and proteins that are fundamental to biological structure and function. Polymers, both natural and synthetic, are created via polymerization of many small molecules, known as monomers. Their consequently large molecular mass, relative to small molecule compounds, produces unique physical properties including toughness, viscoelasticity, and a tendency to form glasses and semicrystalline structures rather than crystals. The terms polymer and resin are often synonymous with plastic.
The term "polymer" derives from the Greek word πολύς (polus, meaning "many, much") and μέρος (meros, meaning "part"), and refers to a molecule whose structure is composed of multiple repeating units, from which originates a characteristic of high relative molecular mass and attendant properties. The units composing polymers derive, actually or conceptually, from molecules of low relative molecular mass. The term was coined in 1833 by Jöns Jacob Berzelius, though with a definition distinct from the modern IUPAC definition. The modern concept of polymers as covalently bonded macromolecular structures was proposed in 1920 by Hermann Staudinger, who spent the next decade finding experimental evidence for this hypothesis.Polymers are studied in the fields of biophysics and macromolecular science, and polymer science (which includes polymer chemistry and polymer physics). Historically, products arising from the linkage of repeating units by covalent chemical bonds have been the primary focus of polymer science; emerging important areas of the science now focus on non-covalent links. Polyisoprene of latex rubber is an example of a natural/biological polymer, and the polystyrene of styrofoam is an example of a synthetic polymer. In biological contexts, essentially all biological macromolecules—i.e., proteins (polyamides), nucleic acids (polynucleotides), and polysaccharides—are purely polymeric, or are composed in large part of polymeric components—e.g., isoprenylated/lipid-modified glycoproteins, where small lipidic molecules and oligosaccharide modifications occur on the polyamide backbone of the protein.The simplest theoretical models for polymers are ideal chains.
I have 2K rounds for 9mm TULA steel cased ammo, it’s good and has run smoothly in over 11 different 9mm’s I have, I ran through 1650 rounds without an issue.
$499 per 1K
This is my cost price before shipping.
willing to trade for other ammo: 223/556, 5.7x28
AR45/10mm is what I’m really looking...
Hello everyone,
I was curious if anyone knows for sure if it is still legal for someone to purchase and build a Polymer 80 kit for personal use in WA state? I've been eyeballing things on 80p Builder, but I am concerned because I know a law passed awhile back that I think pertains to these.
Thanks
I have a few brand new Polymer80 full size (PF940v2) lowers. These are just the 80% complete lowers with the jig, rear rails, locking block, pins and drill bits. These are the ones that are compatible with Gen 3, 3 pin Glock Gen 3, 3 pin Glock 17/22 Glock 34/35 parts.
Does not include slide...
I have a box of 500 9mm 125gr round nose total polymer jacket bullets that I would like to trade for:
- 500 pieces of 357 magnum brass (new or once fired)
or
- 2 lb of H110 reloading powder
or
- 1000 small pistol magnum primers
or
- 200 rounds of 9mm 124gr or heavier FMJ ammo.
I can meet in...
We have the following Polymer 80's and part kits
Glock 43 Size Frames:
Polymer80 PF9SSBLK G43 Black............................................................................................$120...............3 In stock
Glock 17 Size Frames:
Polymer80 PF940V2GR G17/22 Gen3 Compatible Frame...
Just to be clear I am not bashing polymer 80, I have not yet reached out to customer service about this but I need to vent. I have gotten two frames from them so far and both have not worked out! Wont lie im a little heated!!! The first one I can say I might have messed up the back hole pin...
As the title implies I will trade a case of Winchester Large rifle primers for 1 Polymer 80 PF904c 80% frame. I would prefer an OD frame but will consider a black or FDE frame . Frame must be unused with jig , bits, rails in the box. Midway has these available so I can order one if no one...
I have a few brand new Polymer80 full size (PF940v2) lowers. These are just the 80% complete lowers with the jig, rear rails, locking block, pins and drill bits. These are the ones that are compatible with Gen 3, 3 pin Glock Gen 3, 3 pin Glock 17/22 Glock 34/35 parts.
Does not include slide...
I am getting ready to build out my first P80 g17 clone, and am curious as to what advice those more experienced than myself at it might have.
I have a complete slide to put together, as well as the frame, all parts are OEM except for the slide itself. Bought necessary tools for the channel...
Bought them thinking I’d start some Glock builds and would rather put some money into some other things. They’re brand new never taken out of the jig, comes with everything normally included in the kits. Not interested in any trades right now.
1x - PF940V2 (full size 17 size) in black
1x -...
Bought it brand new thinking I was going to start building this thing but realized that I'm way too lazy to even build the thing. Brand new condition with the tool fixture needed to machine the frame. Glock 17 frame FDE. Will sell for $115.
I have this item up for sale as I have decided to go a different direction.
This is a new kit. I will take $100 cash for it. Face to face transaction in the Beaverton/Aloha area only.
Kit Includes:
Lower and Jig Kit includes:
(1) LR-308 Lower Receiver: W308 Lower
(1) Pistol Grip Nut: 3/8"...
I know there’s another thread about this, but I’m kinda taking this in a different direction.
I understand that the ATF seems to be most interested in the buy / build / shoot kit. None of these items in the kit are considered firearms by the ATF, but I guess they don’t like it when you group...
So if the ATF has the records of Polymer80, I would assume that includes the records of sales, including who bought what, their names and addresses, etc. What is to stop the ATF from using that info to attempt to confiscate the firearms that many think are safe because they are unregistered and...