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complete upper
In mathematics, the least-upper-bound property (sometimes the completeness or supremum property) is a fundamental property of the real numbers and certain other ordered sets. A set X has the least-upper-bound property if and only if every non-empty subset of X with an upper bound has a least upper bound (supremum) in X.
The least-upper-bound property is one form of the completeness axiom for the real numbers, and is sometimes referred to as Dedekind completeness. It can be used to prove many of the fundamental results of real analysis, such as the intermediate value theorem, the Bolzano–Weierstrass theorem, the extreme value theorem, and the Heine–Borel theorem. It is usually taken as an axiom in synthetic constructions of the real numbers (see least upper bound axiom), and it is also intimately related to the construction of the real numbers using Dedekind cuts.
In order theory, this property can be generalized to a notion of completeness for any partially ordered set. A linearly ordered set that is dense and has the least upper bound property is called a linear continuum.
For sale is a complete Aero Precision M4E1 upper. It has a Aero Atlas 15" handguard and a 16" Mid Length Gas Criterion Hybrid Nitride Barrel. The barrel has a 223 Wylde Chamber with a 1-8 twist, hand lapped from the factory, and bedded for accuracy. Yankee Hill Machine Muzzle Brake that kills...
I have a brand new bca 450 bushmaster upper woth bcg 200
Gucci skeletonized 10.5in upper with aim surplus bolt and 18k gold parts like ch amni mag release and bolt release
Eotech 512 might be thrown in or for sale for the right thing
Wanting to trade for a good lpvo
1911
Or any roller...
Selling my complete Radian Wepaons 16" Upper. This was bought as a complete upper directly from Radian Weapons, I did not piece it together, was manufactured and built by Radian and includes everything as it would from the factory. Inlcuded is the following:
- Sub-MOA Accuracy Guarantee with...
For sale is an complete 18" SPR rifle upper. The Upper is an 18" Ballistic Advantage 416R Stainless nitrided barrel with a 1:8 twist and 223 Wylde chamber. 15" free float M-lok rail and a VG6 Delta Muzzle Device. Comes with Magpul vertical grip, BCG, and charging handle. Bought on Black Friday...
Skeleton upper aim surplus bolt carbon handguard 10.5in barrel wont come woth eotech pm for price or trades
Can add cash on my end looking for some cool firearm built a geissele rifle so dont need the gucci ar anymore
Selling my complete Radian Wepaons 16" Upper. This was bought as a complete upper directly from Radian Weapons, I did not piece it together, was manufactured and built by Radian and includes everything as it would from the factory. Inlcuded is the following:
- Sub-MOA Accuracy Guarantee with...
Around 1000 rds fired. 16" .300 AAC Blackout 1:8 twist. A2 birdcage. Pistol length gas system. Dust cover and forward assist. Picatinny rail with two built-in QD sling mounts.
Does not include BCG or charging handle.
I also have a flashlight mount, a BCM vertical grip, and LaRue Tactical...
I have for trade a lightly used pistol upper. It works as it should with factory ammo.
Keyhole upper
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...
Next Generation Arms Billet Lower
Has Parts already installed, but it’s just a lower so it DOES NOT fall under the restrictions imposed by 1639... so it can still be purchased with a simple transfer by WA residents.
It’s a very nice light weight lower with Quality Milspec lower parts, a Noveske...
Aero Precision M4E1 Complete Upper with Gen 2 M-Lok handguard in FDE with 18" 416R stainless barrel and 223 Wylde chamber. Detailed specs here: M4E1 Enhanced 18" .223 Wylde Complete Upper Receiver
Upgraded with 556 Epsilon muzzle break: VG6 EPSILON 556
Purchased new from Aero and test fired...
Factory-built LMT with 14.5 barrel. Extended A2 flash hider was pinned/welded by Adco. Comes with a Daniel Defense 7.0 free-float Omega rail.
Very low round count ~100 total. Bought this in 2008 and it has been in my safe untouched for the last 10 years. Selling to fund a lightweight...
Selling the complete upper with all OEM parts: barrel, BCG, charging handle. The upper is the exact same as:
Complete product information page: 16" Carbine Tactical Evo Upper
Condition and package:
Essentially new condition, total 200-300 rounds through it (tested with brass and steel cased)...
Gone***
I have a very lightly used, less than 200 rounds, Factory built Bootleg/PWS 14.5” Upper with Bootleg 4 position Adjustable BCG and Charge Handle.
Bootleg Industries is the sister company of Primary Weapon Systems (PWS). You may recognize the upper receiver and rail system from the Mod...
Hi I have a excellent condtion Glock 35 gen3 Lone Wolf complete upper. Comes with a Alpha wolf match threaded barrel. TBRC comp. All factory Glock internals. Std sights. Shipped $320. PayPal gift or fee or can do a face to face in Salem great for a poly80 build.
SOLD
For sale is a complete .223 Wylde 18" Premium 416R stainless 1:8 twist upper. The barrel is an SPR profile made by Ballistic Advantage and has a 1 MOA Guarantee from the company. The barrel is set in a matching Billet AT3 upper and 12" handguard set for extra rigidity. The upper was lapped...
This is a factory takeoff of my Colt 6920. 16" threaded barrel. Excellent condition, no damage, blemishes, or scratches. Only approximately 200 rds through it. Only selling because I purchased a different upper. Factory handguard, charging handle, and sling loop included with the following...