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In mathematics, a complete lattice is a partially ordered set in which all subsets have both a supremum (join) and an infimum (meet). Complete lattices appear in many applications in mathematics and computer science. Being a special instance of lattices, they are studied both in order theory and universal algebra.
Complete lattices must not be confused with complete partial orders (cpos), which constitute a strictly more general class of partially ordered sets. More specific complete lattices are complete Boolean algebras and complete Heyting algebras (locales).
Like any good gun owner, I bought an upper, put 50 rounds through to zero, and then replaced it with a new and more expensive upper- so this one is now for sale. There is very little wear aside from some aluminum showing from normal charging handle use, etc. This is the complete upper with...
-Complete ar15 upper receiver
-Ballistic Advantage 8 inch 300 aac/blkout barrel
-a2 birdcage style flash hider
-7 inch troy industries quadrail
Everything is new except the handguard. All you need is a gas block/tube to complete the upper.
For sale is a lightly used complete Palmetto State 16" M4 Freedom upper with a brand new Matech rear flip-up sight and ambi charging handle. The previous owner told me he put 20 rounds through it, and I have put 10 rounds through it. As such it is in like-new condition. The rear sight was just...
For sale is a complete upper (no CH/BCG) in 308.
Upper/Handguard ($350): Aero Precision 12" FDE M5E1 (handguard bolts to upper without touching the castle nut for better free floating). Condition: very good with minor wear.
Barrel ($300): Criterion M118 18" 308 Hybrid Profile 1:10 w/nitride...
Spikes Tactical Complete upper 16in Cold Hammer Forged barrel with FSB Includes bcg and ch. upper is still sealed in the factory plastic bag. Yes it includes the factory BCG and charging handle. Also included with this one is a PSA lower parts kit that includes a Magpul moe grip. No trades please.
Pretty much brand new DSG Arms Billet upper... FA and dust cover installed.
Been assembled and has been fired about 10 rounds. I built a pistol for my son and decided having a rifle was a better fit... was going to build a rifle on this, but ended up getting a deal on a complete upper... so...
Complete Glock 19 Gen 3 slide with Ameiglo night sights. Brand new 350.00
2 Glock 26 frames. One is a Gen 3 and is complete. The other is a Gen 4 and has a stipple job that is not the best but still operates fine. The Gen 4 frame has the trigger bar, spring, and housing. Give me an offer. Buyer...
I will consider all Factory makes, models, calibers and cosmetic conditions but the firearm must be complete and in safe operable condition. I have $60 cash waiting to be paid for the right firearm. Please post firearm offers with photo and price in this thread. I may condsider paying a little...
near new LMT block 2 style upper
comes complete with a troy folding rear sight, daniel defense over the sight rail, BCG and CH
front folding grip.
conpelte ready to run upper assembly only
lower reciever that is pictured can be included for more dollars....
this is like $600 off the...
Up for sale. SW WA, Clark County, Vancouver area. I can meet Oregon folks in North, NE Portland.
Brand new. Never used AR-15 5.56 Barrel. 16” M4 style. 1-9 twist. M4 feed ramps. Carbine length gas. 4140 chromoly steel. Nitride coated. AR Stoner (MidwayUSA house brand). Complete with pinned...
I have for trade a lightly used pistol upper. It works as it should with factory ammo.
psa bolt group
7in eld 5.56 chamber barrel
Stainless clamp on gas block
Krinkov style muzzle device with adapter
I would like to trade for a decent red dot . or 16 in complete upper with fixed...
Edit: Sale is pending(Jan 17th 2020), only item available currently are the American Eagle ammo($150 for 18 boxes). Thank you.
-$695($900+ value)- I'm selling a Bushmaster Blackout upper + ammunition I purchased just earlier this year. This is local face-to-face transaction only, in Tigard...