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completed lower
In the mathematical area of order theory, completeness properties assert the existence of certain infima or suprema of a given partially ordered set (poset). The most familiar example is the completeness of the real numbers. A special use of the term refers to complete partial orders or complete lattices. However, many other interesting notions of completeness exist.
The motivation for considering completeness properties derives from the great importance of suprema (least upper bounds, joins, "
{\displaystyle \wedge }
") to the theory of partial orders. Finding a supremum means to single out one distinguished least element from the set of upper bounds. On the one hand, these special elements often embody certain concrete properties that are interesting for the given application (such as being the least common multiple of a set of numbers or the union of a collection of sets). On the other hand, the knowledge that certain types of subsets are guaranteed to have suprema or infima enables us to consider the computation of these elements as total operations on a partially ordered set. For this reason, posets with certain completeness properties can often be described as algebraic structures of a certain kind. In addition, studying the properties of the newly obtained operations yields further interesting subjects.
I have 2 complete kits for sale.
Magpul MOE furniture, PSA LPK (including FCU) and stripped Anderson lower.
Everything you need to build out a complete lower.
$225 each or $425 if you buy both.
This is a complete 16" barrel Aero precision AR-15 5.56x45mm NATO. The rifle has less than 250 rounds through it, and is near spotless. Everything is in great shape, I'm just looking to thin down the collection.
Parts list brand new:
Upper...
For sale: 9mm PCC lower from Go Balistics (uses glock mags) The full lower parts kit has been installed as well and the buffer tube assembly and stock. I decided I don’t need as many projects so I’m going to let this one go. All you need is a complete upper and you’re good to go. $200 willing to...
Brownells Serialized and factory drilled Polymer 80 PF940C for Glock 19/23. Item is used but in good condition. About 150 rounds fired through gun before part out. ALL INTERNALS WERE HAND POLISHED PRIOR TO ASSEMBLY. Internals are gen 3 with ejector upgrade part 30274. Sold as shown. No returns...
I have a like new DD MK18 completed lower (with stock not brace). Was going to SBR it and ended up going a different route. Installed on it is a Franklin Armory BFSIII binary trigger installed. I have shot it an honest to God 10 times to function test.
$900 f2f, $950 shipped. Not interested...
I have two of these Plum Crazy Polymer lowers. Picked up with the thought I'd make some .22LR AR's, but never got around to it. Multi - cal.
$130/each. Transfer paid by buyer. Just getting back what I paid for them. If you buy both, will sell for $250.
Located in Kelso/Longview.